sys/ofed/drivers/infiniband/core/uverbs_cmd.c

   1 /*
   2  * Copyright (c) 2005 Topspin Communications.  All rights reserved.
   3  * Copyright (c) 2005, 2006, 2007 Cisco Systems.  All rights reserved.
   4  * Copyright (c) 2005 PathScale, Inc.  All rights reserved.
   5  * Copyright (c) 2006 Mellanox Technologies.  All rights reserved.
   6  *
   7  * This software is available to you under a choice of one of two
   8  * licenses.  You may choose to be licensed under the terms of the GNU
   9  * General Public License (GPL) Version 2, available from the file
  10  * COPYING in the main directory of this source tree, or the
  11  * OpenIB.org BSD license below:
  12  *
  13  *     Redistribution and use in source and binary forms, with or
  14  *     without modification, are permitted provided that the following
  15  *     conditions are met:
  16  *
  17  *      - Redistributions of source code must retain the above
  18  *        copyright notice, this list of conditions and the following
  19  *        disclaimer.
  20  *
  21  *      - Redistributions in binary form must reproduce the above
  22  *        copyright notice, this list of conditions and the following
  23  *        disclaimer in the documentation and/or other materials
  24  *        provided with the distribution.
  25  *
  26  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  30  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  31  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  32  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  33  * SOFTWARE.
  34  */
  35
  36 #include <linux/file.h>
  37 #include <linux/fs.h>
  38 #include <linux/lockdep.h>
  39
  40 #include <asm/uaccess.h>
  41 #include <asm/fcntl.h>
  42
  43 #include "uverbs.h"
  44
  45 static struct lock_class_key pd_lock_key;
  46 static struct lock_class_key mr_lock_key;
  47 static struct lock_class_key cq_lock_key;
  48 static struct lock_class_key qp_lock_key;
  49 static struct lock_class_key ah_lock_key;
  50 static struct lock_class_key srq_lock_key;
  51
  52 #define INIT_UDATA(udata, ibuf, obuf, ilen, olen)                       \
  53         do {                                                            \
  54                 (udata)->inbuf  = (void __user *) (ibuf);               \
  55                 (udata)->outbuf = (void __user *) (obuf);               \
  56                 (udata)->inlen  = (ilen);                               \
  57                 (udata)->outlen = (olen);                               \
  58         } while (0)
  59
  60 /*
  61  * The ib_uobject locking scheme is as follows:
  62  *
  63  * - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
  64  *   needs to be held during all idr operations.  When an object is
  65  *   looked up, a reference must be taken on the object's kref before
  66  *   dropping this lock.
  67  *
  68  * - Each object also has an rwsem.  This rwsem must be held for
  69  *   reading while an operation that uses the object is performed.
  70  *   For example, while registering an MR, the associated PD's
  71  *   uobject.mutex must be held for reading.  The rwsem must be held
  72  *   for writing while initializing or destroying an object.
  73  *
  74  * - In addition, each object has a "live" flag.  If this flag is not
  75  *   set, then lookups of the object will fail even if it is found in
  76  *   the idr.  This handles a reader that blocks and does not acquire
  77  *   the rwsem until after the object is destroyed.  The destroy
  78  *   operation will set the live flag to 0 and then drop the rwsem;
  79  *   this will allow the reader to acquire the rwsem, see that the
  80  *   live flag is 0, and then drop the rwsem and its reference to
  81  *   object.  The underlying storage will not be freed until the last
  82  *   reference to the object is dropped.
  83  */
  84
  85 static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
  86                       struct ib_ucontext *context, struct lock_class_key *key)
  87 {
  88         uobj->user_handle = user_handle;
  89         uobj->context     = context;
  90         kref_init(&uobj->ref);
  91         init_rwsem(&uobj->mutex);
  92         lockdep_set_class(&uobj->mutex, key);
  93         uobj->live        = 0;
  94 }
  95
  96 static void release_uobj(struct kref *kref)
  97 {
  98         kfree(container_of(kref, struct ib_uobject, ref));
  99 }
 100
 101 static void put_uobj(struct ib_uobject *uobj)
 102 {
 103         kref_put(&uobj->ref, release_uobj);
 104 }
 105
 106 static void put_uobj_read(struct ib_uobject *uobj)
 107 {
 108         up_read(&uobj->mutex);
 109         put_uobj(uobj);
 110 }
 111
 112 static void put_uobj_write(struct ib_uobject *uobj)
 113 {
 114         up_write(&uobj->mutex);
 115         put_uobj(uobj);
 116 }
 117
 118 static int idr_add_uobj(struct idr *idr, struct ib_uobject *uobj)
 119 {
 120         int ret;
 121
 122 retry:
 123         if (!idr_pre_get(idr, GFP_KERNEL))
 124                 return -ENOMEM;
 125
 126         spin_lock(&ib_uverbs_idr_lock);
 127         ret = idr_get_new(idr, uobj, &uobj->id);
 128         spin_unlock(&ib_uverbs_idr_lock);
 129
 130         if (ret == -EAGAIN)
 131                 goto retry;
 132
 133         return ret;
 134 }
 135
 136 void idr_remove_uobj(struct idr *idr, struct ib_uobject *uobj)
 137 {
 138         spin_lock(&ib_uverbs_idr_lock);
 139         idr_remove(idr, uobj->id);
 140         spin_unlock(&ib_uverbs_idr_lock);
 141 }
 142
 143 static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
 144                                          struct ib_ucontext *context)
 145 {
 146         struct ib_uobject *uobj;
 147
 148         spin_lock(&ib_uverbs_idr_lock);
 149         uobj = idr_find(idr, id);
 150         if (uobj) {
 151                 if (uobj->context == context)
 152                         kref_get(&uobj->ref);
 153                 else
 154                         uobj = NULL;
 155         }
 156         spin_unlock(&ib_uverbs_idr_lock);
 157
 158         return uobj;
 159 }
 160
 161 static struct ib_uobject *idr_read_uobj(struct idr *idr, int id,
 162                                         struct ib_ucontext *context, int nested)
 163 {
 164         struct ib_uobject *uobj;
 165
 166         uobj = __idr_get_uobj(idr, id, context);
 167         if (!uobj)
 168                 return NULL;
 169
 170         if (nested)
 171                 down_read_nested(&uobj->mutex, SINGLE_DEPTH_NESTING);
 172         else
 173                 down_read(&uobj->mutex);
 174         if (!uobj->live) {
 175                 put_uobj_read(uobj);
 176                 return NULL;
 177         }
 178
 179         return uobj;
 180 }
 181
 182 static struct ib_uobject *idr_write_uobj(struct idr *idr, int id,
 183                                          struct ib_ucontext *context)
 184 {
 185         struct ib_uobject *uobj;
 186
 187         uobj = __idr_get_uobj(idr, id, context);
 188         if (!uobj)
 189                 return NULL;
 190
 191         down_write(&uobj->mutex);
 192         if (!uobj->live) {
 193                 put_uobj_write(uobj);
 194                 return NULL;
 195         }
 196
 197         return uobj;
 198 }
 199
 200 static void *idr_read_obj(struct idr *idr, int id, struct ib_ucontext *context,
 201                           int nested)
 202 {
 203         struct ib_uobject *uobj;
 204
 205         uobj = idr_read_uobj(idr, id, context, nested);
 206         return uobj ? uobj->object : NULL;
 207 }
 208
 209 static struct ib_pd *idr_read_pd(int pd_handle, struct ib_ucontext *context)
 210 {
 211         return idr_read_obj(&ib_uverbs_pd_idr, pd_handle, context, 0);
 212 }
 213
 214 static void put_pd_read(struct ib_pd *pd)
 215 {
 216         put_uobj_read(pd->uobject);
 217 }
 218
 219 static struct ib_cq *idr_read_cq(int cq_handle, struct ib_ucontext *context, int nested)
 220 {
 221         return idr_read_obj(&ib_uverbs_cq_idr, cq_handle, context, nested);
 222 }
 223
 224 static void put_cq_read(struct ib_cq *cq)
 225 {
 226         put_uobj_read(cq->uobject);
 227 }
 228
 229 static struct ib_ah *idr_read_ah(int ah_handle, struct ib_ucontext *context)
 230 {
 231         return idr_read_obj(&ib_uverbs_ah_idr, ah_handle, context, 0);
 232 }
 233
 234 static void put_ah_read(struct ib_ah *ah)
 235 {
 236         put_uobj_read(ah->uobject);
 237 }
 238
 239 static struct ib_qp *idr_read_qp(int qp_handle, struct ib_ucontext *context)
 240 {
 241         return idr_read_obj(&ib_uverbs_qp_idr, qp_handle, context, 0);
 242 }
 243
 244 static void put_qp_read(struct ib_qp *qp)
 245 {
 246         put_uobj_read(qp->uobject);
 247 }
 248
 249 static struct ib_srq *idr_read_srq(int srq_handle, struct ib_ucontext *context)
 250 {
 251         return idr_read_obj(&ib_uverbs_srq_idr, srq_handle, context, 0);
 252 }
 253
 254 static void put_srq_read(struct ib_srq *srq)
 255 {
 256         put_uobj_read(srq->uobject);
 257 }
 258
 259 static struct ib_xrcd *idr_read_xrcd(int xrcd_handle,
 260                                      struct ib_ucontext *context,
 261                                      struct ib_uobject **uobj)
 262 {
 263         *uobj = idr_read_uobj(&ib_uverbs_xrc_domain_idr, xrcd_handle,
 264                               context, 0);
 265         return *uobj ? (*uobj)->object : NULL;
 266 }
 267
 268 static void put_xrcd_read(struct ib_uobject *uobj)
 269 {
 270         put_uobj_read(uobj);
 271 }
 272
 273 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
 274                               const char __user *buf,
 275                               int in_len, int out_len)
 276 {
 277         struct ib_uverbs_get_context      cmd;
 278         struct ib_uverbs_get_context_resp resp;
 279         struct ib_udata                   udata;
 280         struct ib_device                 *ibdev = file->device->ib_dev;
 281         struct ib_ucontext               *ucontext;
 282         struct file                      *filp;
 283         int ret;
 284
 285         if (out_len < sizeof resp)
 286                 return -ENOSPC;
 287
 288         if (copy_from_user(&cmd, buf, sizeof cmd))
 289                 return -EFAULT;
 290
 291         mutex_lock(&file->mutex);
 292
 293         if (file->ucontext) {
 294                 ret = -EINVAL;
 295                 goto err;
 296         }
 297
 298         INIT_UDATA(&udata, buf + sizeof cmd,
 299                    (unsigned long) cmd.response + sizeof resp,
 300                    in_len - sizeof cmd, out_len - sizeof resp);
 301
 302         ucontext = ibdev->alloc_ucontext(ibdev, &udata);
 303         if (IS_ERR(ucontext)) {
 304                 ret = PTR_ERR(file->ucontext);
 305                 goto err;
 306         }
 307
 308         ucontext->device = ibdev;
 309         INIT_LIST_HEAD(&ucontext->pd_list);
 310         INIT_LIST_HEAD(&ucontext->mr_list);
 311         INIT_LIST_HEAD(&ucontext->mw_list);
 312         INIT_LIST_HEAD(&ucontext->cq_list);
 313         INIT_LIST_HEAD(&ucontext->qp_list);
 314         INIT_LIST_HEAD(&ucontext->srq_list);
 315         INIT_LIST_HEAD(&ucontext->ah_list);
 316         INIT_LIST_HEAD(&ucontext->xrcd_list);
 317         ucontext->closing = 0;
 318
 319         resp.num_comp_vectors = file->device->num_comp_vectors;
 320
 321         filp = ib_uverbs_alloc_event_file(file, 1, &resp.async_fd);
 322         if (IS_ERR(filp)) {
 323                 ret = PTR_ERR(filp);
 324                 goto err_free;
 325         }
 326
 327         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 328                          &resp, sizeof resp)) {
 329                 ret = -EFAULT;
 330                 goto err_file;
 331         }
 332
 333         file->async_file = filp->private_data;
 334
 335         INIT_IB_EVENT_HANDLER(&file->event_handler, file->device->ib_dev,
 336                               ib_uverbs_event_handler);
 337         ret = ib_register_event_handler(&file->event_handler);
 338         if (ret)
 339                 goto err_file;
 340
 341         kref_get(&file->async_file->ref);
 342         kref_get(&file->ref);
 343         file->ucontext = ucontext;
 344
 345         fd_install(resp.async_fd, filp);
 346
 347         mutex_unlock(&file->mutex);
 348
 349         return in_len;
 350
 351 err_file:
 352         put_unused_fd(resp.async_fd);
 353         fput(filp);
 354
 355 err_free:
 356         ibdev->dealloc_ucontext(ucontext);
 357
 358 err:
 359         mutex_unlock(&file->mutex);
 360         return ret;
 361 }
 362
 363 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
 364                                const char __user *buf,
 365                                int in_len, int out_len)
 366 {
 367         struct ib_uverbs_query_device      cmd;
 368         struct ib_uverbs_query_device_resp resp;
 369         struct ib_device_attr              attr;
 370         int                                ret;
 371
 372         if (out_len < sizeof resp)
 373                 return -ENOSPC;
 374
 375         if (copy_from_user(&cmd, buf, sizeof cmd))
 376                 return -EFAULT;
 377
 378         ret = ib_query_device(file->device->ib_dev, &attr);
 379         if (ret)
 380                 return ret;
 381
 382         memset(&resp, 0, sizeof resp);
 383
 384         resp.fw_ver                    = attr.fw_ver;
 385         resp.node_guid                 = file->device->ib_dev->node_guid;
 386         resp.sys_image_guid            = attr.sys_image_guid;
 387         resp.max_mr_size               = attr.max_mr_size;
 388         resp.page_size_cap             = attr.page_size_cap;
 389         resp.vendor_id                 = attr.vendor_id;
 390         resp.vendor_part_id            = attr.vendor_part_id;
 391         resp.hw_ver                    = attr.hw_ver;
 392         resp.max_qp                    = attr.max_qp;
 393         resp.max_qp_wr                 = attr.max_qp_wr;
 394         resp.device_cap_flags          = attr.device_cap_flags;
 395         resp.max_sge                   = attr.max_sge;
 396         resp.max_sge_rd                = attr.max_sge_rd;
 397         resp.max_cq                    = attr.max_cq;
 398         resp.max_cqe                   = attr.max_cqe;
 399         resp.max_mr                    = attr.max_mr;
 400         resp.max_pd                    = attr.max_pd;
 401         resp.max_qp_rd_atom            = attr.max_qp_rd_atom;
 402         resp.max_ee_rd_atom            = attr.max_ee_rd_atom;
 403         resp.max_res_rd_atom           = attr.max_res_rd_atom;
 404         resp.max_qp_init_rd_atom       = attr.max_qp_init_rd_atom;
 405         resp.max_ee_init_rd_atom       = attr.max_ee_init_rd_atom;
 406         resp.atomic_cap                = attr.atomic_cap;
 407         resp.max_ee                    = attr.max_ee;
 408         resp.max_rdd                   = attr.max_rdd;
 409         resp.max_mw                    = attr.max_mw;
 410         resp.max_raw_ipv6_qp           = attr.max_raw_ipv6_qp;
 411         resp.max_raw_ethy_qp           = attr.max_raw_ethy_qp;
 412         resp.max_mcast_grp             = attr.max_mcast_grp;
 413         resp.max_mcast_qp_attach       = attr.max_mcast_qp_attach;
 414         resp.max_total_mcast_qp_attach = attr.max_total_mcast_qp_attach;
 415         resp.max_ah                    = attr.max_ah;
 416         resp.max_fmr                   = attr.max_fmr;
 417         resp.max_map_per_fmr           = attr.max_map_per_fmr;
 418         resp.max_srq                   = attr.max_srq;
 419         resp.max_srq_wr                = attr.max_srq_wr;
 420         resp.max_srq_sge               = attr.max_srq_sge;
 421         resp.max_pkeys                 = attr.max_pkeys;
 422         resp.local_ca_ack_delay        = attr.local_ca_ack_delay;
 423         resp.phys_port_cnt             = file->device->ib_dev->phys_port_cnt;
 424
 425         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 426                          &resp, sizeof resp))
 427                 return -EFAULT;
 428
 429         return in_len;
 430 }
 431
 432 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
 433                              const char __user *buf,
 434                              int in_len, int out_len)
 435 {
 436         struct ib_uverbs_query_port      cmd;
 437         struct ib_uverbs_query_port_resp resp;
 438         struct ib_port_attr              attr;
 439         int                              ret;
 440
 441         if (out_len < sizeof resp)
 442                 return -ENOSPC;
 443
 444         if (copy_from_user(&cmd, buf, sizeof cmd))
 445                 return -EFAULT;
 446
 447         ret = ib_query_port(file->device->ib_dev, cmd.port_num, &attr);
 448         if (ret)
 449                 return ret;
 450
 451         memset(&resp, 0, sizeof resp);
 452
 453         resp.state           = attr.state;
 454         resp.max_mtu         = attr.max_mtu;
 455         resp.active_mtu      = attr.active_mtu;
 456         resp.gid_tbl_len     = attr.gid_tbl_len;
 457         resp.port_cap_flags  = attr.port_cap_flags;
 458         resp.max_msg_sz      = attr.max_msg_sz;
 459         resp.bad_pkey_cntr   = attr.bad_pkey_cntr;
 460         resp.qkey_viol_cntr  = attr.qkey_viol_cntr;
 461         resp.pkey_tbl_len    = attr.pkey_tbl_len;
 462         resp.lid             = attr.lid;
 463         resp.sm_lid          = attr.sm_lid;
 464         resp.lmc             = attr.lmc;
 465         resp.max_vl_num      = attr.max_vl_num;
 466         resp.sm_sl           = attr.sm_sl;
 467         resp.subnet_timeout  = attr.subnet_timeout;
 468         resp.init_type_reply = attr.init_type_reply;
 469         resp.active_width    = attr.active_width;
 470         resp.active_speed    = attr.active_speed;
 471         resp.phys_state      = attr.phys_state;
 472         resp.link_layer      = attr.link_layer;
 473
 474         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 475                          &resp, sizeof resp))
 476                 return -EFAULT;
 477
 478         return in_len;
 479 }
 480
 481 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
 482                            const char __user *buf,
 483                            int in_len, int out_len)
 484 {
 485         struct ib_uverbs_alloc_pd      cmd;
 486         struct ib_uverbs_alloc_pd_resp resp;
 487         struct ib_udata                udata;
 488         struct ib_uobject             *uobj;
 489         struct ib_pd                  *pd;
 490         int                            ret;
 491
 492         if (out_len < sizeof resp)
 493                 return -ENOSPC;
 494
 495         if (copy_from_user(&cmd, buf, sizeof cmd))
 496                 return -EFAULT;
 497
 498         INIT_UDATA(&udata, buf + sizeof cmd,
 499                    (unsigned long) cmd.response + sizeof resp,
 500                    in_len - sizeof cmd, out_len - sizeof resp);
 501
 502         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 503         if (!uobj)
 504                 return -ENOMEM;
 505
 506         init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
 507         down_write(&uobj->mutex);
 508
 509         pd = file->device->ib_dev->alloc_pd(file->device->ib_dev,
 510                                             file->ucontext, &udata);
 511         if (IS_ERR(pd)) {
 512                 ret = PTR_ERR(pd);
 513                 goto err;
 514         }
 515
 516         pd->device  = file->device->ib_dev;
 517         pd->uobject = uobj;
 518         atomic_set(&pd->usecnt, 0);
 519
 520         uobj->object = pd;
 521         ret = idr_add_uobj(&ib_uverbs_pd_idr, uobj);
 522         if (ret)
 523                 goto err_idr;
 524
 525         memset(&resp, 0, sizeof resp);
 526         resp.pd_handle = uobj->id;
 527
 528         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 529                          &resp, sizeof resp)) {
 530                 ret = -EFAULT;
 531                 goto err_copy;
 532         }
 533
 534         mutex_lock(&file->mutex);
 535         list_add_tail(&uobj->list, &file->ucontext->pd_list);
 536         mutex_unlock(&file->mutex);
 537
 538         uobj->live = 1;
 539
 540         up_write(&uobj->mutex);
 541
 542         return in_len;
 543
 544 err_copy:
 545         idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
 546
 547 err_idr:
 548         ib_dealloc_pd(pd);
 549
 550 err:
 551         put_uobj_write(uobj);
 552         return ret;
 553 }
 554
 555 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
 556                              const char __user *buf,
 557                              int in_len, int out_len)
 558 {
 559         struct ib_uverbs_dealloc_pd cmd;
 560         struct ib_uobject          *uobj;
 561         int                         ret;
 562
 563         if (copy_from_user(&cmd, buf, sizeof cmd))
 564                 return -EFAULT;
 565
 566         uobj = idr_write_uobj(&ib_uverbs_pd_idr, cmd.pd_handle, file->ucontext);
 567         if (!uobj)
 568                 return -EINVAL;
 569
 570         ret = ib_dealloc_pd(uobj->object);
 571         if (!ret)
 572                 uobj->live = 0;
 573
 574         put_uobj_write(uobj);
 575
 576         if (ret)
 577                 return ret;
 578
 579         idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
 580
 581         mutex_lock(&file->mutex);
 582         list_del(&uobj->list);
 583         mutex_unlock(&file->mutex);
 584
 585         put_uobj(uobj);
 586
 587         return in_len;
 588 }
 589
 590 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
 591                          const char __user *buf, int in_len,
 592                          int out_len)
 593 {
 594         struct ib_uverbs_reg_mr      cmd;
 595         struct ib_uverbs_reg_mr_resp resp;
 596         struct ib_udata              udata;
 597         struct ib_uobject           *uobj;
 598         struct ib_pd                *pd;
 599         struct ib_mr                *mr;
 600         int                          ret;
 601
 602         if (out_len < sizeof resp)
 603                 return -ENOSPC;
 604
 605         if (copy_from_user(&cmd, buf, sizeof cmd))
 606                 return -EFAULT;
 607
 608         INIT_UDATA(&udata, buf + sizeof cmd,
 609                    (unsigned long) cmd.response + sizeof resp,
 610                    in_len - sizeof cmd, out_len - sizeof resp);
 611
 612         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 613                 return -EINVAL;
 614
 615         /*
 616          * Local write permission is required if remote write or
 617          * remote atomic permission is also requested.
 618          */
 619         if (cmd.access_flags & (IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_REMOTE_WRITE) &&
 620             !(cmd.access_flags & IB_ACCESS_LOCAL_WRITE))
 621                 return -EINVAL;
 622
 623         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
 624         if (!uobj)
 625                 return -ENOMEM;
 626
 627         init_uobj(uobj, 0, file->ucontext, &mr_lock_key);
 628         down_write(&uobj->mutex);
 629
 630         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
 631         if (!pd) {
 632                 ret = -EINVAL;
 633                 goto err_free;
 634         }
 635
 636         mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
 637                                      cmd.access_flags, &udata, 0);
 638         if (IS_ERR(mr)) {
 639                 ret = PTR_ERR(mr);
 640                 goto err_put;
 641         }
 642
 643         mr->device  = pd->device;
 644         mr->pd      = pd;
 645         mr->uobject = uobj;
 646         atomic_inc(&pd->usecnt);
 647         atomic_set(&mr->usecnt, 0);
 648
 649         uobj->object = mr;
 650         ret = idr_add_uobj(&ib_uverbs_mr_idr, uobj);
 651         if (ret)
 652                 goto err_unreg;
 653
 654         memset(&resp, 0, sizeof resp);
 655         resp.lkey      = mr->lkey;
 656         resp.rkey      = mr->rkey;
 657         resp.mr_handle = uobj->id;
 658
 659         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 660                          &resp, sizeof resp)) {
 661                 ret = -EFAULT;
 662                 goto err_copy;
 663         }
 664
 665         put_pd_read(pd);
 666
 667         mutex_lock(&file->mutex);
 668         list_add_tail(&uobj->list, &file->ucontext->mr_list);
 669         mutex_unlock(&file->mutex);
 670
 671         uobj->live = 1;
 672
 673         up_write(&uobj->mutex);
 674
 675         return in_len;
 676
 677 err_copy:
 678         idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
 679
 680 err_unreg:
 681         ib_dereg_mr(mr);
 682
 683 err_put:
 684         put_pd_read(pd);
 685
 686 err_free:
 687         put_uobj_write(uobj);
 688         return ret;
 689 }
 690
 691 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
 692                            const char __user *buf, int in_len,
 693                            int out_len)
 694 {
 695         struct ib_uverbs_dereg_mr cmd;
 696         struct ib_mr             *mr;
 697         struct ib_uobject        *uobj;
 698         int                       ret = -EINVAL;
 699
 700         if (copy_from_user(&cmd, buf, sizeof cmd))
 701                 return -EFAULT;
 702
 703         uobj = idr_write_uobj(&ib_uverbs_mr_idr, cmd.mr_handle, file->ucontext);
 704         if (!uobj)
 705                 return -EINVAL;
 706
 707         mr = uobj->object;
 708
 709         ret = ib_dereg_mr(mr);
 710         if (!ret)
 711                 uobj->live = 0;
 712
 713         put_uobj_write(uobj);
 714
 715         if (ret)
 716                 return ret;
 717
 718         idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
 719
 720         mutex_lock(&file->mutex);
 721         list_del(&uobj->list);
 722         mutex_unlock(&file->mutex);
 723
 724         put_uobj(uobj);
 725
 726         return in_len;
 727 }
 728
 729 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
 730                                       const char __user *buf, int in_len,
 731                                       int out_len)
 732 {
 733         struct ib_uverbs_create_comp_channel       cmd;
 734         struct ib_uverbs_create_comp_channel_resp  resp;
 735         struct file                               *filp;
 736
 737         if (out_len < sizeof resp)
 738                 return -ENOSPC;
 739
 740         if (copy_from_user(&cmd, buf, sizeof cmd))
 741                 return -EFAULT;
 742
 743         filp = ib_uverbs_alloc_event_file(file, 0, &resp.fd);
 744         if (IS_ERR(filp))
 745                 return PTR_ERR(filp);
 746
 747         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 748                          &resp, sizeof resp)) {
 749                 put_unused_fd(resp.fd);
 750                 fput(filp);
 751                 return -EFAULT;
 752         }
 753
 754         fd_install(resp.fd, filp);
 755         return in_len;
 756 }
 757
 758 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
 759                             const char __user *buf, int in_len,
 760                             int out_len)
 761 {
 762         struct ib_uverbs_create_cq      cmd;
 763         struct ib_uverbs_create_cq_resp resp;
 764         struct ib_udata                 udata;
 765         struct ib_ucq_object           *obj;
 766         struct ib_uverbs_event_file    *ev_file = NULL;
 767         struct ib_cq                   *cq;
 768         int                             ret;
 769
 770         if (out_len < sizeof resp)
 771                 return -ENOSPC;
 772
 773         if (copy_from_user(&cmd, buf, sizeof cmd))
 774                 return -EFAULT;
 775
 776         INIT_UDATA(&udata, buf + sizeof cmd,
 777                    (unsigned long) cmd.response + sizeof resp,
 778                    in_len - sizeof cmd, out_len - sizeof resp);
 779
 780         if (cmd.comp_vector >= file->device->num_comp_vectors)
 781                 return -EINVAL;
 782
 783         obj = kmalloc(sizeof *obj, GFP_KERNEL);
 784         if (!obj)
 785                 return -ENOMEM;
 786
 787         init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &cq_lock_key);
 788         down_write(&obj->uobject.mutex);
 789
 790         if (cmd.comp_channel >= 0) {
 791                 ev_file = ib_uverbs_lookup_comp_file(cmd.comp_channel);
 792                 if (!ev_file) {
 793                         ret = -EINVAL;
 794                         goto err;
 795                 }
 796         }
 797
 798         obj->uverbs_file           = file;
 799         obj->comp_events_reported  = 0;
 800         obj->async_events_reported = 0;
 801         INIT_LIST_HEAD(&obj->comp_list);
 802         INIT_LIST_HEAD(&obj->async_list);
 803
 804         cq = file->device->ib_dev->create_cq(file->device->ib_dev, cmd.cqe,
 805                                              cmd.comp_vector,
 806                                              file->ucontext, &udata);
 807         if (IS_ERR(cq)) {
 808                 ret = PTR_ERR(cq);
 809                 goto err_file;
 810         }
 811
 812         cq->device        = file->device->ib_dev;
 813         cq->uobject       = &obj->uobject;
 814         cq->comp_handler  = ib_uverbs_comp_handler;
 815         cq->event_handler = ib_uverbs_cq_event_handler;
 816         cq->cq_context    = ev_file;
 817         atomic_set(&cq->usecnt, 0);
 818
 819         obj->uobject.object = cq;
 820         ret = idr_add_uobj(&ib_uverbs_cq_idr, &obj->uobject);
 821         if (ret)
 822                 goto err_free;
 823
 824         memset(&resp, 0, sizeof resp);
 825         resp.cq_handle = obj->uobject.id;
 826         resp.cqe       = cq->cqe;
 827
 828         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 829                          &resp, sizeof resp)) {
 830                 ret = -EFAULT;
 831                 goto err_copy;
 832         }
 833
 834         mutex_lock(&file->mutex);
 835         list_add_tail(&obj->uobject.list, &file->ucontext->cq_list);
 836         mutex_unlock(&file->mutex);
 837
 838         obj->uobject.live = 1;
 839
 840         up_write(&obj->uobject.mutex);
 841
 842         return in_len;
 843
 844 err_copy:
 845         idr_remove_uobj(&ib_uverbs_cq_idr, &obj->uobject);
 846
 847 err_free:
 848         ib_destroy_cq(cq);
 849
 850 err_file:
 851         if (ev_file)
 852                 ib_uverbs_release_ucq(file, ev_file, obj);
 853
 854 err:
 855         put_uobj_write(&obj->uobject);
 856         return ret;
 857 }
 858
 859 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
 860                             const char __user *buf, int in_len,
 861                             int out_len)
 862 {
 863         struct ib_uverbs_resize_cq      cmd;
 864         struct ib_uverbs_resize_cq_resp resp;
 865         struct ib_udata                 udata;
 866         struct ib_cq                    *cq;
 867         int                             ret = -EINVAL;
 868
 869         if (copy_from_user(&cmd, buf, sizeof cmd))
 870                 return -EFAULT;
 871
 872         INIT_UDATA(&udata, buf + sizeof cmd,
 873                    (unsigned long) cmd.response + sizeof resp,
 874                    in_len - sizeof cmd, out_len - sizeof resp);
 875
 876         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
 877         if (!cq)
 878                 return -EINVAL;
 879
 880         ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
 881         if (ret)
 882                 goto out;
 883
 884         resp.cqe = cq->cqe;
 885
 886         if (copy_to_user((void __user *) (unsigned long) cmd.response,
 887                          &resp, sizeof resp.cqe))
 888                 ret = -EFAULT;
 889
 890 out:
 891         put_cq_read(cq);
 892
 893         return ret ? ret : in_len;
 894 }
 895
 896 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
 897                           const char __user *buf, int in_len,
 898                           int out_len)
 899 {
 900         struct ib_uverbs_poll_cq       cmd;
 901         struct ib_uverbs_poll_cq_resp *resp;
 902         struct ib_cq                  *cq;
 903         struct ib_wc                  *wc;
 904         int                            ret = 0;
 905         int                            i;
 906         int                            rsize;
 907
 908         if (copy_from_user(&cmd, buf, sizeof cmd))
 909                 return -EFAULT;
 910
 911         wc = kmalloc(cmd.ne * sizeof *wc, GFP_KERNEL);
 912         if (!wc)
 913                 return -ENOMEM;
 914
 915         rsize = sizeof *resp + cmd.ne * sizeof(struct ib_uverbs_wc);
 916         resp = kmalloc(rsize, GFP_KERNEL);
 917         if (!resp) {
 918                 ret = -ENOMEM;
 919                 goto out_wc;
 920         }
 921
 922         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
 923         if (!cq) {
 924                 ret = -EINVAL;
 925                 goto out;
 926         }
 927
 928         resp->count = ib_poll_cq(cq, cmd.ne, wc);
 929
 930         put_cq_read(cq);
 931
 932         for (i = 0; i < resp->count; i++) {
 933                 resp->wc[i].wr_id          = wc[i].wr_id;
 934                 resp->wc[i].status         = wc[i].status;
 935                 resp->wc[i].opcode         = wc[i].opcode;
 936                 resp->wc[i].vendor_err     = wc[i].vendor_err;
 937                 resp->wc[i].byte_len       = wc[i].byte_len;
 938                 resp->wc[i].ex.imm_data    = (__u32 __force) wc[i].ex.imm_data;
 939                 resp->wc[i].qp_num         = wc[i].qp->qp_num;
 940                 resp->wc[i].src_qp         = wc[i].src_qp;
 941                 resp->wc[i].wc_flags       = wc[i].wc_flags;
 942                 resp->wc[i].pkey_index     = wc[i].pkey_index;
 943                 resp->wc[i].slid           = wc[i].slid;
 944                 resp->wc[i].sl             = wc[i].sl;
 945                 resp->wc[i].dlid_path_bits = wc[i].dlid_path_bits;
 946                 resp->wc[i].port_num       = wc[i].port_num;
 947         }
 948
 949         if (copy_to_user((void __user *) (unsigned long) cmd.response, resp, rsize))
 950                 ret = -EFAULT;
 951
 952 out:
 953         kfree(resp);
 954
 955 out_wc:
 956         kfree(wc);
 957         return ret ? ret : in_len;
 958 }
 959
 960 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
 961                                 const char __user *buf, int in_len,
 962                                 int out_len)
 963 {
 964         struct ib_uverbs_req_notify_cq cmd;
 965         struct ib_cq                  *cq;
 966
 967         if (copy_from_user(&cmd, buf, sizeof cmd))
 968                 return -EFAULT;
 969
 970         cq = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
 971         if (!cq)
 972                 return -EINVAL;
 973
 974         ib_req_notify_cq(cq, cmd.solicited_only ?
 975                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
 976
 977         put_cq_read(cq);
 978
 979         return in_len;
 980 }
 981
 982 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
 983                              const char __user *buf, int in_len,
 984                              int out_len)
 985 {
 986         struct ib_uverbs_destroy_cq      cmd;
 987         struct ib_uverbs_destroy_cq_resp resp;
 988         struct ib_uobject               *uobj;
 989         struct ib_cq                    *cq;
 990         struct ib_ucq_object            *obj;
 991         struct ib_uverbs_event_file     *ev_file;
 992         int                              ret = -EINVAL;
 993
 994         if (copy_from_user(&cmd, buf, sizeof cmd))
 995                 return -EFAULT;
 996
 997         uobj = idr_write_uobj(&ib_uverbs_cq_idr, cmd.cq_handle, file->ucontext);
 998         if (!uobj)
 999                 return -EINVAL;
1000         cq      = uobj->object;
1001         ev_file = cq->cq_context;
1002         obj     = container_of(cq->uobject, struct ib_ucq_object, uobject);
1003
1004         ret = ib_destroy_cq(cq);
1005         if (!ret)
1006                 uobj->live = 0;
1007
1008         put_uobj_write(uobj);
1009
1010         if (ret)
1011                 return ret;
1012
1013         idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
1014
1015         mutex_lock(&file->mutex);
1016         list_del(&uobj->list);
1017         mutex_unlock(&file->mutex);
1018
1019         ib_uverbs_release_ucq(file, ev_file, obj);
1020
1021         memset(&resp, 0, sizeof resp);
1022         resp.comp_events_reported  = obj->comp_events_reported;
1023         resp.async_events_reported = obj->async_events_reported;
1024
1025         put_uobj(uobj);
1026
1027         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1028                          &resp, sizeof resp))
1029                 return -EFAULT;
1030
1031         return in_len;
1032 }
1033
1034 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1035                             const char __user *buf, int in_len,
1036                             int out_len)
1037 {
1038         struct ib_uverbs_create_qp      cmd;
1039         struct ib_uverbs_create_qp_resp resp;
1040         struct ib_udata                 udata;
1041         struct ib_uqp_object           *obj;
1042         struct ib_pd                   *pd;
1043         struct ib_cq                   *scq, *rcq;
1044         struct ib_srq                  *srq;
1045         struct ib_qp                   *qp;
1046         struct ib_qp_init_attr          attr;
1047         struct ib_xrcd                 *xrcd;
1048         struct ib_uobject              *xrcd_uobj;
1049         int ret;
1050
1051         if (out_len < sizeof resp)
1052                 return -ENOSPC;
1053
1054         if (copy_from_user(&cmd, buf, sizeof cmd))
1055                 return -EFAULT;
1056
1057         INIT_UDATA(&udata, buf + sizeof cmd,
1058                    (unsigned long) cmd.response + sizeof resp,
1059                    in_len - sizeof cmd, out_len - sizeof resp);
1060
1061         obj = kmalloc(sizeof *obj, GFP_KERNEL);
1062         if (!obj)
1063                 return -ENOMEM;
1064
1065         init_uobj(&obj->uevent.uobject, cmd.user_handle, file->ucontext, &qp_lock_key);
1066         down_write(&obj->uevent.uobject.mutex);
1067
1068         srq = (cmd.is_srq && cmd.qp_type != IB_QPT_XRC) ?
1069                 idr_read_srq(cmd.srq_handle, file->ucontext) : NULL;
1070         xrcd = cmd.qp_type == IB_QPT_XRC ?
1071                 idr_read_xrcd(cmd.srq_handle, file->ucontext, &xrcd_uobj) : NULL;
1072         pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
1073         scq = idr_read_cq(cmd.send_cq_handle, file->ucontext, 0);
1074         rcq = cmd.recv_cq_handle == cmd.send_cq_handle ?
1075                 scq : idr_read_cq(cmd.recv_cq_handle, file->ucontext, 1);
1076
1077         if (!pd || !scq || !rcq || (cmd.is_srq && !srq) ||
1078             (cmd.qp_type == IB_QPT_XRC && !xrcd)) {
1079                 ret = -EINVAL;
1080                 goto err_put;
1081         }
1082
1083         attr.create_flags  = 0;
1084         attr.event_handler = ib_uverbs_qp_event_handler;
1085         attr.qp_context    = file;
1086         attr.send_cq       = scq;
1087         attr.recv_cq       = rcq;
1088         attr.srq           = srq;
1089         attr.sq_sig_type   = cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
1090         attr.qp_type       = cmd.qp_type;
1091         attr.xrcd    = xrcd;
1092         attr.create_flags  = 0;
1093
1094         attr.cap.max_send_wr     = cmd.max_send_wr;
1095         attr.cap.max_recv_wr     = cmd.max_recv_wr;
1096         attr.cap.max_send_sge    = cmd.max_send_sge;
1097         attr.cap.max_recv_sge    = cmd.max_recv_sge;
1098         attr.cap.max_inline_data = cmd.max_inline_data;
1099
1100         obj->uevent.events_reported     = 0;
1101         INIT_LIST_HEAD(&obj->uevent.event_list);
1102         INIT_LIST_HEAD(&obj->mcast_list);
1103
1104         qp = pd->device->create_qp(pd, &attr, &udata);
1105         if (IS_ERR(qp)) {
1106                 ret = PTR_ERR(qp);
1107                 goto err_put;
1108         }
1109
1110         qp->device        = pd->device;
1111         qp->pd            = pd;
1112         qp->send_cq       = attr.send_cq;
1113         qp->recv_cq       = attr.recv_cq;
1114         qp->srq           = attr.srq;
1115         qp->uobject       = &obj->uevent.uobject;
1116         qp->event_handler = attr.event_handler;
1117         qp->qp_context    = attr.qp_context;
1118         qp->qp_type       = attr.qp_type;
1119         qp->xrcd          = attr.xrcd;
1120         atomic_inc(&pd->usecnt);
1121         atomic_inc(&attr.send_cq->usecnt);
1122         atomic_inc(&attr.recv_cq->usecnt);
1123         if (attr.srq)
1124                 atomic_inc(&attr.srq->usecnt);
1125         else if (attr.xrcd)
1126                 atomic_inc(&attr.xrcd->usecnt);
1127
1128         obj->uevent.uobject.object = qp;
1129         ret = idr_add_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1130         if (ret)
1131                 goto err_destroy;
1132
1133         memset(&resp, 0, sizeof resp);
1134         resp.qpn             = qp->qp_num;
1135         resp.qp_handle       = obj->uevent.uobject.id;
1136         resp.max_recv_sge    = attr.cap.max_recv_sge;
1137         resp.max_send_sge    = attr.cap.max_send_sge;
1138         resp.max_recv_wr     = attr.cap.max_recv_wr;
1139         resp.max_send_wr     = attr.cap.max_send_wr;
1140         resp.max_inline_data = attr.cap.max_inline_data;
1141
1142         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1143                          &resp, sizeof resp)) {
1144                 ret = -EFAULT;
1145                 goto err_copy;
1146         }
1147
1148         put_pd_read(pd);
1149         put_cq_read(scq);
1150         if (rcq != scq)
1151                 put_cq_read(rcq);
1152         if (srq)
1153                 put_srq_read(srq);
1154         if (xrcd)
1155                 put_xrcd_read(xrcd_uobj);
1156
1157         mutex_lock(&file->mutex);
1158         list_add_tail(&obj->uevent.uobject.list, &file->ucontext->qp_list);
1159         mutex_unlock(&file->mutex);
1160
1161         obj->uevent.uobject.live = 1;
1162
1163         up_write(&obj->uevent.uobject.mutex);
1164
1165         return in_len;
1166
1167 err_copy:
1168         idr_remove_uobj(&ib_uverbs_qp_idr, &obj->uevent.uobject);
1169
1170 err_destroy:
1171         ib_destroy_qp(qp);
1172
1173 err_put:
1174         if (pd)
1175                 put_pd_read(pd);
1176         if (scq)
1177                 put_cq_read(scq);
1178         if (rcq && rcq != scq)
1179                 put_cq_read(rcq);
1180         if (srq)
1181                 put_srq_read(srq);
1182         if (xrcd)
1183                 put_xrcd_read(xrcd_uobj);
1184
1185         put_uobj_write(&obj->uevent.uobject);
1186         return ret;
1187 }
1188
1189 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1190                            const char __user *buf, int in_len,
1191                            int out_len)
1192 {
1193         struct ib_uverbs_query_qp      cmd;
1194         struct ib_uverbs_query_qp_resp resp;
1195         struct ib_qp                   *qp;
1196         struct ib_qp_attr              *attr;
1197         struct ib_qp_init_attr         *init_attr;
1198         int                            ret;
1199
1200         if (copy_from_user(&cmd, buf, sizeof cmd))
1201                 return -EFAULT;
1202
1203         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1204         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1205         if (!attr || !init_attr) {
1206                 ret = -ENOMEM;
1207                 goto out;
1208         }
1209
1210         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1211         if (!qp) {
1212                 ret = -EINVAL;
1213                 goto out;
1214         }
1215
1216         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1217
1218         put_qp_read(qp);
1219
1220         if (ret)
1221                 goto out;
1222
1223         memset(&resp, 0, sizeof resp);
1224
1225         resp.qp_state               = attr->qp_state;
1226         resp.cur_qp_state           = attr->cur_qp_state;
1227         resp.path_mtu               = attr->path_mtu;
1228         resp.path_mig_state         = attr->path_mig_state;
1229         resp.qkey                   = attr->qkey;
1230         resp.rq_psn                 = attr->rq_psn;
1231         resp.sq_psn                 = attr->sq_psn;
1232         resp.dest_qp_num            = attr->dest_qp_num;
1233         resp.qp_access_flags        = attr->qp_access_flags;
1234         resp.pkey_index             = attr->pkey_index;
1235         resp.alt_pkey_index         = attr->alt_pkey_index;
1236         resp.sq_draining            = attr->sq_draining;
1237         resp.max_rd_atomic          = attr->max_rd_atomic;
1238         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1239         resp.min_rnr_timer          = attr->min_rnr_timer;
1240         resp.port_num               = attr->port_num;
1241         resp.timeout                = attr->timeout;
1242         resp.retry_cnt              = attr->retry_cnt;
1243         resp.rnr_retry              = attr->rnr_retry;
1244         resp.alt_port_num           = attr->alt_port_num;
1245         resp.alt_timeout            = attr->alt_timeout;
1246
1247         memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
1248         resp.dest.flow_label        = attr->ah_attr.grh.flow_label;
1249         resp.dest.sgid_index        = attr->ah_attr.grh.sgid_index;
1250         resp.dest.hop_limit         = attr->ah_attr.grh.hop_limit;
1251         resp.dest.traffic_class     = attr->ah_attr.grh.traffic_class;
1252         resp.dest.dlid              = attr->ah_attr.dlid;
1253         resp.dest.sl                = attr->ah_attr.sl;
1254         resp.dest.src_path_bits     = attr->ah_attr.src_path_bits;
1255         resp.dest.static_rate       = attr->ah_attr.static_rate;
1256         resp.dest.is_global         = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
1257         resp.dest.port_num          = attr->ah_attr.port_num;
1258
1259         memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
1260         resp.alt_dest.flow_label    = attr->alt_ah_attr.grh.flow_label;
1261         resp.alt_dest.sgid_index    = attr->alt_ah_attr.grh.sgid_index;
1262         resp.alt_dest.hop_limit     = attr->alt_ah_attr.grh.hop_limit;
1263         resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
1264         resp.alt_dest.dlid          = attr->alt_ah_attr.dlid;
1265         resp.alt_dest.sl            = attr->alt_ah_attr.sl;
1266         resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
1267         resp.alt_dest.static_rate   = attr->alt_ah_attr.static_rate;
1268         resp.alt_dest.is_global     = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
1269         resp.alt_dest.port_num      = attr->alt_ah_attr.port_num;
1270
1271         resp.max_send_wr            = init_attr->cap.max_send_wr;
1272         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1273         resp.max_send_sge           = init_attr->cap.max_send_sge;
1274         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1275         resp.max_inline_data        = init_attr->cap.max_inline_data;
1276         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1277
1278         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1279                          &resp, sizeof resp))
1280                 ret = -EFAULT;
1281
1282 out:
1283         kfree(attr);
1284         kfree(init_attr);
1285
1286         return ret ? ret : in_len;
1287 }
1288
1289 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
1290                             const char __user *buf, int in_len,
1291                             int out_len)
1292 {
1293         struct ib_uverbs_modify_qp cmd;
1294         struct ib_udata            udata;
1295         struct ib_qp              *qp;
1296         struct ib_qp_attr         *attr;
1297         int                        ret;
1298
1299         if (copy_from_user(&cmd, buf, sizeof cmd))
1300                 return -EFAULT;
1301
1302         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
1303                    out_len);
1304
1305         attr = kmalloc(sizeof *attr, GFP_KERNEL);
1306         if (!attr)
1307                 return -ENOMEM;
1308
1309         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1310         if (!qp) {
1311                 ret = -EINVAL;
1312                 goto out;
1313         }
1314
1315         attr->qp_state            = cmd.qp_state;
1316         attr->cur_qp_state        = cmd.cur_qp_state;
1317         attr->path_mtu            = cmd.path_mtu;
1318         attr->path_mig_state      = cmd.path_mig_state;
1319         attr->qkey                = cmd.qkey;
1320         attr->rq_psn              = cmd.rq_psn;
1321         attr->sq_psn              = cmd.sq_psn;
1322         attr->dest_qp_num         = cmd.dest_qp_num;
1323         attr->qp_access_flags     = cmd.qp_access_flags;
1324         attr->pkey_index          = cmd.pkey_index;
1325         attr->alt_pkey_index      = cmd.alt_pkey_index;
1326         attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
1327         attr->max_rd_atomic       = cmd.max_rd_atomic;
1328         attr->max_dest_rd_atomic  = cmd.max_dest_rd_atomic;
1329         attr->min_rnr_timer       = cmd.min_rnr_timer;
1330         attr->port_num            = cmd.port_num;
1331         attr->timeout             = cmd.timeout;
1332         attr->retry_cnt           = cmd.retry_cnt;
1333         attr->rnr_retry           = cmd.rnr_retry;
1334         attr->alt_port_num        = cmd.alt_port_num;
1335         attr->alt_timeout         = cmd.alt_timeout;
1336
1337         memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
1338         attr->ah_attr.grh.flow_label        = cmd.dest.flow_label;
1339         attr->ah_attr.grh.sgid_index        = cmd.dest.sgid_index;
1340         attr->ah_attr.grh.hop_limit         = cmd.dest.hop_limit;
1341         attr->ah_attr.grh.traffic_class     = cmd.dest.traffic_class;
1342         attr->ah_attr.dlid                  = cmd.dest.dlid;
1343         attr->ah_attr.sl                    = cmd.dest.sl;
1344         attr->ah_attr.src_path_bits         = cmd.dest.src_path_bits;
1345         attr->ah_attr.static_rate           = cmd.dest.static_rate;
1346         attr->ah_attr.ah_flags              = cmd.dest.is_global ? IB_AH_GRH : 0;
1347         attr->ah_attr.port_num              = cmd.dest.port_num;
1348
1349         memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
1350         attr->alt_ah_attr.grh.flow_label    = cmd.alt_dest.flow_label;
1351         attr->alt_ah_attr.grh.sgid_index    = cmd.alt_dest.sgid_index;
1352         attr->alt_ah_attr.grh.hop_limit     = cmd.alt_dest.hop_limit;
1353         attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
1354         attr->alt_ah_attr.dlid              = cmd.alt_dest.dlid;
1355         attr->alt_ah_attr.sl                = cmd.alt_dest.sl;
1356         attr->alt_ah_attr.src_path_bits     = cmd.alt_dest.src_path_bits;
1357         attr->alt_ah_attr.static_rate       = cmd.alt_dest.static_rate;
1358         attr->alt_ah_attr.ah_flags          = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
1359         attr->alt_ah_attr.port_num          = cmd.alt_dest.port_num;
1360
1361         ret = qp->device->modify_qp(qp, attr, cmd.attr_mask, &udata);
1362
1363         put_qp_read(qp);
1364
1365         if (ret)
1366                 goto out;
1367
1368         ret = in_len;
1369
1370 out:
1371         kfree(attr);
1372
1373         return ret;
1374 }
1375
1376 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
1377                              const char __user *buf, int in_len,
1378                              int out_len)
1379 {
1380         struct ib_uverbs_destroy_qp      cmd;
1381         struct ib_uverbs_destroy_qp_resp resp;
1382         struct ib_uobject               *uobj;
1383         struct ib_qp                    *qp;
1384         struct ib_uqp_object            *obj;
1385         int                              ret = -EINVAL;
1386
1387         if (copy_from_user(&cmd, buf, sizeof cmd))
1388                 return -EFAULT;
1389
1390         memset(&resp, 0, sizeof resp);
1391
1392         uobj = idr_write_uobj(&ib_uverbs_qp_idr, cmd.qp_handle, file->ucontext);
1393         if (!uobj)
1394                 return -EINVAL;
1395         qp  = uobj->object;
1396         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1397
1398         if (!list_empty(&obj->mcast_list)) {
1399                 put_uobj_write(uobj);
1400                 return -EBUSY;
1401         }
1402
1403         ret = ib_destroy_qp(qp);
1404         if (!ret)
1405                 uobj->live = 0;
1406
1407         put_uobj_write(uobj);
1408
1409         if (ret)
1410                 return ret;
1411
1412         idr_remove_uobj(&ib_uverbs_qp_idr, uobj);
1413
1414         mutex_lock(&file->mutex);
1415         list_del(&uobj->list);
1416         mutex_unlock(&file->mutex);
1417
1418         ib_uverbs_release_uevent(file, &obj->uevent);
1419
1420         resp.events_reported = obj->uevent.events_reported;
1421
1422         put_uobj(uobj);
1423
1424         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1425                          &resp, sizeof resp))
1426                 return -EFAULT;
1427
1428         return in_len;
1429 }
1430
1431 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
1432                             const char __user *buf, int in_len,
1433                             int out_len)
1434 {
1435         struct ib_uverbs_post_send      cmd;
1436         struct ib_uverbs_post_send_resp resp;
1437         struct ib_uverbs_send_wr       *user_wr;
1438         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
1439         struct ib_qp                   *qp;
1440         int                             i, sg_ind;
1441         int                             is_ud;
1442         ssize_t                         ret = -EINVAL;
1443
1444         if (copy_from_user(&cmd, buf, sizeof cmd))
1445                 return -EFAULT;
1446
1447         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
1448             cmd.sge_count * sizeof (struct ib_uverbs_sge))
1449                 return -EINVAL;
1450
1451         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
1452                 return -EINVAL;
1453
1454         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
1455         if (!user_wr)
1456                 return -ENOMEM;
1457
1458         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1459         if (!qp)
1460                 goto out;
1461
1462         is_ud = qp->qp_type == IB_QPT_UD;
1463         sg_ind = 0;
1464         last = NULL;
1465         for (i = 0; i < cmd.wr_count; ++i) {
1466                 if (copy_from_user(user_wr,
1467                                    buf + sizeof cmd + i * cmd.wqe_size,
1468                                    cmd.wqe_size)) {
1469                         ret = -EFAULT;
1470                         goto out_put;
1471                 }
1472
1473                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
1474                         ret = -EINVAL;
1475                         goto out_put;
1476                 }
1477
1478                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1479                                user_wr->num_sge * sizeof (struct ib_sge),
1480                                GFP_KERNEL);
1481                 if (!next) {
1482                         ret = -ENOMEM;
1483                         goto out_put;
1484                 }
1485
1486                 if (!last)
1487                         wr = next;
1488                 else
1489                         last->next = next;
1490                 last = next;
1491
1492                 next->next       = NULL;
1493                 next->wr_id      = user_wr->wr_id;
1494                 next->num_sge    = user_wr->num_sge;
1495                 next->opcode     = user_wr->opcode;
1496                 next->send_flags = user_wr->send_flags;
1497
1498                 if (is_ud) {
1499                         next->wr.ud.ah = idr_read_ah(user_wr->wr.ud.ah,
1500                                                      file->ucontext);
1501                         if (!next->wr.ud.ah) {
1502                                 ret = -EINVAL;
1503                                 goto out_put;
1504                         }
1505                         next->wr.ud.remote_qpn  = user_wr->wr.ud.remote_qpn;
1506                         next->wr.ud.remote_qkey = user_wr->wr.ud.remote_qkey;
1507                 } else {
1508                         switch (next->opcode) {
1509                         case IB_WR_RDMA_WRITE_WITH_IMM:
1510                                 next->ex.imm_data =
1511                                         (__be32 __force) user_wr->ex.imm_data;
1512                         case IB_WR_RDMA_WRITE:
1513                         case IB_WR_RDMA_READ:
1514                                 next->wr.rdma.remote_addr =
1515                                         user_wr->wr.rdma.remote_addr;
1516                                 next->wr.rdma.rkey        =
1517                                         user_wr->wr.rdma.rkey;
1518                                 break;
1519                         case IB_WR_SEND_WITH_IMM:
1520                                 next->ex.imm_data =
1521                                         (__be32 __force) user_wr->ex.imm_data;
1522                                 break;
1523                         case IB_WR_SEND_WITH_INV:
1524                                 next->ex.invalidate_rkey =
1525                                         user_wr->ex.invalidate_rkey;
1526                                 break;
1527                         case IB_WR_ATOMIC_CMP_AND_SWP:
1528                         case IB_WR_ATOMIC_FETCH_AND_ADD:
1529                                 next->wr.atomic.remote_addr =
1530                                         user_wr->wr.atomic.remote_addr;
1531                                 next->wr.atomic.compare_add =
1532                                         user_wr->wr.atomic.compare_add;
1533                                 next->wr.atomic.swap = user_wr->wr.atomic.swap;
1534                                 next->wr.atomic.rkey = user_wr->wr.atomic.rkey;
1535                                 break;
1536                         default:
1537                                 break;
1538                         }
1539                 }
1540
1541                 if (next->num_sge) {
1542                         next->sg_list = (void *) next +
1543                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
1544                         if (copy_from_user(next->sg_list,
1545                                            buf + sizeof cmd +
1546                                            cmd.wr_count * cmd.wqe_size +
1547                                            sg_ind * sizeof (struct ib_sge),
1548                                            next->num_sge * sizeof (struct ib_sge))) {
1549                                 ret = -EFAULT;
1550                                 goto out_put;
1551                         }
1552                         sg_ind += next->num_sge;
1553                 } else
1554                         next->sg_list = NULL;
1555         }
1556
1557         resp.bad_wr = 0;
1558         ret = qp->device->post_send(qp, wr, &bad_wr);
1559         if (ret)
1560                 for (next = wr; next; next = next->next) {
1561                         ++resp.bad_wr;
1562                         if (next == bad_wr)
1563                                 break;
1564                 }
1565
1566         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1567                          &resp, sizeof resp))
1568                 ret = -EFAULT;
1569
1570 out_put:
1571         put_qp_read(qp);
1572
1573         while (wr) {
1574                 if (is_ud && wr->wr.ud.ah)
1575                         put_ah_read(wr->wr.ud.ah);
1576                 next = wr->next;
1577                 kfree(wr);
1578                 wr = next;
1579         }
1580
1581 out:
1582         kfree(user_wr);
1583
1584         return ret ? ret : in_len;
1585 }
1586
1587 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
1588                                                     int in_len,
1589                                                     u32 wr_count,
1590                                                     u32 sge_count,
1591                                                     u32 wqe_size)
1592 {
1593         struct ib_uverbs_recv_wr *user_wr;
1594         struct ib_recv_wr        *wr = NULL, *last, *next;
1595         int                       sg_ind;
1596         int                       i;
1597         int                       ret;
1598
1599         if (in_len < wqe_size * wr_count +
1600             sge_count * sizeof (struct ib_uverbs_sge))
1601                 return ERR_PTR(-EINVAL);
1602
1603         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
1604                 return ERR_PTR(-EINVAL);
1605
1606         user_wr = kmalloc(wqe_size, GFP_KERNEL);
1607         if (!user_wr)
1608                 return ERR_PTR(-ENOMEM);
1609
1610         sg_ind = 0;
1611         last = NULL;
1612         for (i = 0; i < wr_count; ++i) {
1613                 if (copy_from_user(user_wr, buf + i * wqe_size,
1614                                    wqe_size)) {
1615                         ret = -EFAULT;
1616                         goto err;
1617                 }
1618
1619                 if (user_wr->num_sge + sg_ind > sge_count) {
1620                         ret = -EINVAL;
1621                         goto err;
1622                 }
1623
1624                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
1625                                user_wr->num_sge * sizeof (struct ib_sge),
1626                                GFP_KERNEL);
1627                 if (!next) {
1628                         ret = -ENOMEM;
1629                         goto err;
1630                 }
1631
1632                 if (!last)
1633                         wr = next;
1634                 else
1635                         last->next = next;
1636                 last = next;
1637
1638                 next->next       = NULL;
1639                 next->wr_id      = user_wr->wr_id;
1640                 next->num_sge    = user_wr->num_sge;
1641
1642                 if (next->num_sge) {
1643                         next->sg_list = (void *) next +
1644                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
1645                         if (copy_from_user(next->sg_list,
1646                                            buf + wr_count * wqe_size +
1647                                            sg_ind * sizeof (struct ib_sge),
1648                                            next->num_sge * sizeof (struct ib_sge))) {
1649                                 ret = -EFAULT;
1650                                 goto err;
1651                         }
1652                         sg_ind += next->num_sge;
1653                 } else
1654                         next->sg_list = NULL;
1655         }
1656
1657         kfree(user_wr);
1658         return wr;
1659
1660 err:
1661         kfree(user_wr);
1662
1663         while (wr) {
1664                 next = wr->next;
1665                 kfree(wr);
1666                 wr = next;
1667         }
1668
1669         return ERR_PTR(ret);
1670 }
1671
1672 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
1673                             const char __user *buf, int in_len,
1674                             int out_len)
1675 {
1676         struct ib_uverbs_post_recv      cmd;
1677         struct ib_uverbs_post_recv_resp resp;
1678         struct ib_recv_wr              *wr, *next, *bad_wr;
1679         struct ib_qp                   *qp;
1680         ssize_t                         ret = -EINVAL;
1681
1682         if (copy_from_user(&cmd, buf, sizeof cmd))
1683                 return -EFAULT;
1684
1685         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1686                                        in_len - sizeof cmd, cmd.wr_count,
1687                                        cmd.sge_count, cmd.wqe_size);
1688         if (IS_ERR(wr))
1689                 return PTR_ERR(wr);
1690
1691         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1692         if (!qp)
1693                 goto out;
1694
1695         resp.bad_wr = 0;
1696         ret = qp->device->post_recv(qp, wr, &bad_wr);
1697
1698         put_qp_read(qp);
1699
1700         if (ret)
1701                 for (next = wr; next; next = next->next) {
1702                         ++resp.bad_wr;
1703                         if (next == bad_wr)
1704                                 break;
1705                 }
1706
1707         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1708                          &resp, sizeof resp))
1709                 ret = -EFAULT;
1710
1711 out:
1712         while (wr) {
1713                 next = wr->next;
1714                 kfree(wr);
1715                 wr = next;
1716         }
1717
1718         return ret ? ret : in_len;
1719 }
1720
1721 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
1722                                 const char __user *buf, int in_len,
1723                                 int out_len)
1724 {
1725         struct ib_uverbs_post_srq_recv      cmd;
1726         struct ib_uverbs_post_srq_recv_resp resp;
1727         struct ib_recv_wr                  *wr, *next, *bad_wr;
1728         struct ib_srq                      *srq;
1729         ssize_t                             ret = -EINVAL;
1730
1731         if (copy_from_user(&cmd, buf, sizeof cmd))
1732                 return -EFAULT;
1733
1734         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
1735                                        in_len - sizeof cmd, cmd.wr_count,
1736                                        cmd.sge_count, cmd.wqe_size);
1737         if (IS_ERR(wr))
1738                 return PTR_ERR(wr);
1739
1740         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
1741         if (!srq)
1742                 goto out;
1743
1744         resp.bad_wr = 0;
1745         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
1746
1747         put_srq_read(srq);
1748
1749         if (ret)
1750                 for (next = wr; next; next = next->next) {
1751                         ++resp.bad_wr;
1752                         if (next == bad_wr)
1753                                 break;
1754                 }
1755
1756         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1757                          &resp, sizeof resp))
1758                 ret = -EFAULT;
1759
1760 out:
1761         while (wr) {
1762                 next = wr->next;
1763                 kfree(wr);
1764                 wr = next;
1765         }
1766
1767         return ret ? ret : in_len;
1768 }
1769
1770 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
1771                             const char __user *buf, int in_len,
1772                             int out_len)
1773 {
1774         struct ib_uverbs_create_ah       cmd;
1775         struct ib_uverbs_create_ah_resp  resp;
1776         struct ib_uobject               *uobj;
1777         struct ib_pd                    *pd;
1778         struct ib_ah                    *ah;
1779         struct ib_ah_attr               attr;
1780         int ret;
1781
1782         if (out_len < sizeof resp)
1783                 return -ENOSPC;
1784
1785         if (copy_from_user(&cmd, buf, sizeof cmd))
1786                 return -EFAULT;
1787
1788         uobj = kmalloc(sizeof *uobj, GFP_KERNEL);
1789         if (!uobj)
1790                 return -ENOMEM;
1791
1792         init_uobj(uobj, cmd.user_handle, file->ucontext, &ah_lock_key);
1793         down_write(&uobj->mutex);
1794
1795         pd = idr_read_pd(cmd.pd_handle, file->ucontext);
1796         if (!pd) {
1797                 ret = -EINVAL;
1798                 goto err;
1799         }
1800
1801         attr.dlid              = cmd.attr.dlid;
1802         attr.sl                = cmd.attr.sl;
1803         attr.src_path_bits     = cmd.attr.src_path_bits;
1804         attr.static_rate       = cmd.attr.static_rate;
1805         attr.ah_flags          = cmd.attr.is_global ? IB_AH_GRH : 0;
1806         attr.port_num          = cmd.attr.port_num;
1807         attr.grh.flow_label    = cmd.attr.grh.flow_label;
1808         attr.grh.sgid_index    = cmd.attr.grh.sgid_index;
1809         attr.grh.hop_limit     = cmd.attr.grh.hop_limit;
1810         attr.grh.traffic_class = cmd.attr.grh.traffic_class;
1811         memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);
1812
1813         ah = ib_create_ah(pd, &attr);
1814         if (IS_ERR(ah)) {
1815                 ret = PTR_ERR(ah);
1816                 goto err_put;
1817         }
1818
1819         ah->uobject  = uobj;
1820         uobj->object = ah;
1821
1822         ret = idr_add_uobj(&ib_uverbs_ah_idr, uobj);
1823         if (ret)
1824                 goto err_destroy;
1825
1826         resp.ah_handle = uobj->id;
1827
1828         if (copy_to_user((void __user *) (unsigned long) cmd.response,
1829                          &resp, sizeof resp)) {
1830                 ret = -EFAULT;
1831                 goto err_copy;
1832         }
1833
1834         put_pd_read(pd);
1835
1836         mutex_lock(&file->mutex);
1837         list_add_tail(&uobj->list, &file->ucontext->ah_list);
1838         mutex_unlock(&file->mutex);
1839
1840         uobj->live = 1;
1841
1842         up_write(&uobj->mutex);
1843
1844         return in_len;
1845
1846 err_copy:
1847         idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1848
1849 err_destroy:
1850         ib_destroy_ah(ah);
1851
1852 err_put:
1853         put_pd_read(pd);
1854
1855 err:
1856         put_uobj_write(uobj);
1857         return ret;
1858 }
1859
1860 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
1861                              const char __user *buf, int in_len, int out_len)
1862 {
1863         struct ib_uverbs_destroy_ah cmd;
1864         struct ib_ah               *ah;
1865         struct ib_uobject          *uobj;
1866         int                         ret;
1867
1868         if (copy_from_user(&cmd, buf, sizeof cmd))
1869                 return -EFAULT;
1870
1871         uobj = idr_write_uobj(&ib_uverbs_ah_idr, cmd.ah_handle, file->ucontext);
1872         if (!uobj)
1873                 return -EINVAL;
1874         ah = uobj->object;
1875
1876         ret = ib_destroy_ah(ah);
1877         if (!ret)
1878                 uobj->live = 0;
1879
1880         put_uobj_write(uobj);
1881
1882         if (ret)
1883                 return ret;
1884
1885         idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
1886
1887         mutex_lock(&file->mutex);
1888         list_del(&uobj->list);
1889         mutex_unlock(&file->mutex);
1890
1891         put_uobj(uobj);
1892
1893         return in_len;
1894 }
1895
1896 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
1897                                const char __user *buf, int in_len,
1898                                int out_len)
1899 {
1900         struct ib_uverbs_attach_mcast cmd;
1901         struct ib_qp                 *qp;
1902         struct ib_uqp_object         *obj;
1903         struct ib_uverbs_mcast_entry *mcast;
1904         int                           ret;
1905
1906         if (copy_from_user(&cmd, buf, sizeof cmd))
1907                 return -EFAULT;
1908
1909         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1910         if (!qp)
1911                 return -EINVAL;
1912
1913         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1914
1915         list_for_each_entry(mcast, &obj->mcast_list, list)
1916                 if (cmd.mlid == mcast->lid &&
1917                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1918                         ret = 0;
1919                         goto out_put;
1920                 }
1921
1922         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
1923         if (!mcast) {
1924                 ret = -ENOMEM;
1925                 goto out_put;
1926         }
1927
1928         mcast->lid = cmd.mlid;
1929         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
1930
1931         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
1932         if (!ret)
1933                 list_add_tail(&mcast->list, &obj->mcast_list);
1934         else
1935                 kfree(mcast);
1936
1937 out_put:
1938         put_qp_read(qp);
1939
1940         return ret ? ret : in_len;
1941 }
1942
1943 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
1944                                const char __user *buf, int in_len,
1945                                int out_len)
1946 {
1947         struct ib_uverbs_detach_mcast cmd;
1948         struct ib_uqp_object         *obj;
1949         struct ib_qp                 *qp;
1950         struct ib_uverbs_mcast_entry *mcast;
1951         int                           ret = -EINVAL;
1952
1953         if (copy_from_user(&cmd, buf, sizeof cmd))
1954                 return -EFAULT;
1955
1956         qp = idr_read_qp(cmd.qp_handle, file->ucontext);
1957         if (!qp)
1958                 return -EINVAL;
1959
1960         ret = ib_detach_mcast(qp, (union ib_gid *) cmd.gid, cmd.mlid);
1961         if (ret)
1962                 goto out_put;
1963
1964         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
1965
1966         list_for_each_entry(mcast, &obj->mcast_list, list)
1967                 if (cmd.mlid == mcast->lid &&
1968                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
1969                         list_del(&mcast->list);
1970                         kfree(mcast);
1971                         break;
1972                 }
1973
1974 out_put:
1975         put_qp_read(qp);
1976
1977         return ret ? ret : in_len;
1978 }
1979
1980 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
1981                              const char __user *buf, int in_len,
1982                              int out_len)
1983 {
1984         struct ib_uverbs_create_srq      cmd;
1985         struct ib_uverbs_create_srq_resp resp;
1986         struct ib_udata                  udata;
1987         struct ib_uevent_object         *obj;
1988         struct ib_pd                    *pd;
1989         struct ib_srq                   *srq;
1990         struct ib_srq_init_attr          attr;
1991         int ret;
1992
1993         if (out_len < sizeof resp)
1994                 return -ENOSPC;
1995
1996         if (copy_from_user(&cmd, buf, sizeof cmd))
1997                 return -EFAULT;
1998
1999         INIT_UDATA(&udata, buf + sizeof cmd,
2000                    (unsigned long) cmd.response + sizeof resp,
2001                    in_len - sizeof cmd, out_len - sizeof resp);
2002
2003         obj = kmalloc(sizeof *obj, GFP_KERNEL);
2004         if (!obj)
2005                 return -ENOMEM;
2006
2007         init_uobj(&obj->uobject, cmd.user_handle, file->ucontext, &srq_lock_key);
2008         down_write(&obj->uobject.mutex);
2009
2010         pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
2011         if (!pd) {
2012                 ret = -EINVAL;
2013                 goto err;
2014         }
2015
2016         attr.event_handler  = ib_uverbs_srq_event_handler;
2017         attr.srq_context    = file;
2018         attr.attr.max_wr    = cmd.max_wr;
2019         attr.attr.max_sge   = cmd.max_sge;
2020         attr.attr.srq_limit = cmd.srq_limit;
2021
2022         obj->events_reported     = 0;
2023         INIT_LIST_HEAD(&obj->event_list);
2024
2025         srq = pd->device->create_srq(pd, &attr, &udata);
2026         if (IS_ERR(srq)) {
2027                 ret = PTR_ERR(srq);
2028                 goto err_put;
2029         }
2030
2031         srq->device        = pd->device;
2032         srq->pd            = pd;
2033         srq->uobject       = &obj->uobject;
2034         srq->event_handler = attr.event_handler;
2035         srq->srq_context   = attr.srq_context;
2036         srq->ext.xrc.cq = NULL;
2037         srq->ext.xrc.xrcd = NULL;
2038         atomic_inc(&pd->usecnt);
2039         atomic_set(&srq->usecnt, 0);
2040
2041         obj->uobject.object = srq;
2042         ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2043         if (ret)
2044                 goto err_destroy;
2045
2046         memset(&resp, 0, sizeof resp);
2047         resp.srq_handle = obj->uobject.id;
2048         resp.max_wr     = attr.attr.max_wr;
2049         resp.max_sge    = attr.attr.max_sge;
2050
2051         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2052                          &resp, sizeof resp)) {
2053                 ret = -EFAULT;
2054                 goto err_copy;
2055         }
2056
2057         put_pd_read(pd);
2058
2059         mutex_lock(&file->mutex);
2060         list_add_tail(&obj->uobject.list, &file->ucontext->srq_list);
2061         mutex_unlock(&file->mutex);
2062
2063         obj->uobject.live = 1;
2064
2065         up_write(&obj->uobject.mutex);
2066
2067         return in_len;
2068
2069 err_copy:
2070         idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2071
2072 err_destroy:
2073         ib_destroy_srq(srq);
2074
2075 err_put:
2076         put_pd_read(pd);
2077
2078 err:
2079         put_uobj_write(&obj->uobject);
2080         return ret;
2081 }
2082
2083 ssize_t ib_uverbs_create_xrc_srq(struct ib_uverbs_file *file,
2084                              const char __user *buf, int in_len,
2085                              int out_len)
2086 {
2087         struct ib_uverbs_create_xsrq  cmd;
2088         struct ib_uverbs_create_srq_resp resp;
2089         struct ib_udata                  udata;
2090         struct ib_uevent_object         *obj;
2091         struct ib_pd                    *pd;
2092         struct ib_srq                   *srq;
2093         struct ib_cq                    *xrc_cq;
2094         struct ib_xrcd                  *xrcd;
2095         struct ib_srq_init_attr          attr;
2096         struct ib_uobject               *xrcd_uobj;
2097         int ret;
2098
2099         if (out_len < sizeof resp)
2100                 return -ENOSPC;
2101
2102         if (copy_from_user(&cmd, buf, sizeof cmd))
2103                 return -EFAULT;
2104
2105         INIT_UDATA(&udata, buf + sizeof cmd,
2106                    (unsigned long) cmd.response + sizeof resp,
2107                    in_len - sizeof cmd, out_len - sizeof resp);
2108
2109         obj = kmalloc(sizeof *obj, GFP_KERNEL);
2110         if (!obj)
2111                 return -ENOMEM;
2112
2113         init_uobj(&obj->uobject, cmd.user_handle, file->ucontext,
2114                   &srq_lock_key);
2115         down_write(&obj->uobject.mutex);
2116
2117         pd  = idr_read_pd(cmd.pd_handle, file->ucontext);
2118         if (!pd) {
2119                 ret = -EINVAL;
2120                 goto err;
2121         }
2122
2123         xrc_cq  = idr_read_cq(cmd.cq_handle, file->ucontext, 0);
2124         if (!xrc_cq) {
2125                 ret = -EINVAL;
2126                 goto err_put_pd;
2127         }
2128
2129         xrcd  = idr_read_xrcd(cmd.xrcd_handle, file->ucontext, &xrcd_uobj);
2130         if (!xrcd) {
2131                 ret = -EINVAL;
2132                 goto err_put_cq;
2133         }
2134
2135
2136         attr.event_handler  = ib_uverbs_srq_event_handler;
2137         attr.srq_context    = file;
2138         attr.attr.max_wr    = cmd.max_wr;
2139         attr.attr.max_sge   = cmd.max_sge;
2140         attr.attr.srq_limit = cmd.srq_limit;
2141
2142         obj->events_reported     = 0;
2143         INIT_LIST_HEAD(&obj->event_list);
2144
2145         srq = pd->device->create_xrc_srq(pd, xrc_cq, xrcd, &attr, &udata);
2146         if (IS_ERR(srq)) {
2147                 ret = PTR_ERR(srq);
2148                 goto err_put;
2149         }
2150
2151         srq->device        = pd->device;
2152         srq->pd            = pd;
2153         srq->uobject       = &obj->uobject;
2154         srq->event_handler = attr.event_handler;
2155         srq->srq_context   = attr.srq_context;
2156         srq->ext.xrc.cq    = xrc_cq;
2157         srq->ext.xrc.xrcd          = xrcd;
2158         atomic_inc(&pd->usecnt);
2159         atomic_inc(&xrc_cq->usecnt);
2160         atomic_inc(&xrcd->usecnt);
2161
2162         atomic_set(&srq->usecnt, 0);
2163
2164         obj->uobject.object = srq;
2165         ret = idr_add_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2166         if (ret)
2167                 goto err_destroy;
2168
2169         memset(&resp, 0, sizeof resp);
2170         resp.srq_handle = obj->uobject.id;
2171         resp.max_wr     = attr.attr.max_wr;
2172         resp.max_sge    = attr.attr.max_sge;
2173
2174         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2175                          &resp, sizeof resp)) {
2176                 ret = -EFAULT;
2177                 goto err_copy;
2178         }
2179
2180         put_xrcd_read(xrcd_uobj);
2181         put_cq_read(xrc_cq);
2182         put_pd_read(pd);
2183
2184         mutex_lock(&file->mutex);
2185         list_add_tail(&obj->uobject.list, &file->ucontext->srq_list);
2186         mutex_unlock(&file->mutex);
2187
2188         obj->uobject.live = 1;
2189
2190         up_write(&obj->uobject.mutex);
2191
2192         return in_len;
2193
2194 err_copy:
2195         idr_remove_uobj(&ib_uverbs_srq_idr, &obj->uobject);
2196
2197 err_destroy:
2198         ib_destroy_srq(srq);
2199
2200 err_put:
2201         put_xrcd_read(xrcd_uobj);
2202
2203 err_put_cq:
2204         put_cq_read(xrc_cq);
2205
2206 err_put_pd:
2207         put_pd_read(pd);
2208
2209 err:
2210         put_uobj_write(&obj->uobject);
2211         return ret;
2212 }
2213
2214 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
2215                              const char __user *buf, int in_len,
2216                              int out_len)
2217 {
2218         struct ib_uverbs_modify_srq cmd;
2219         struct ib_udata             udata;
2220         struct ib_srq              *srq;
2221         struct ib_srq_attr          attr;
2222         int                         ret;
2223
2224         if (copy_from_user(&cmd, buf, sizeof cmd))
2225                 return -EFAULT;
2226
2227         INIT_UDATA(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
2228                    out_len);
2229
2230         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2231         if (!srq)
2232                 return -EINVAL;
2233
2234         attr.max_wr    = cmd.max_wr;
2235         attr.srq_limit = cmd.srq_limit;
2236
2237         ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
2238
2239         put_srq_read(srq);
2240
2241         return ret ? ret : in_len;
2242 }
2243
2244 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
2245                             const char __user *buf,
2246                             int in_len, int out_len)
2247 {
2248         struct ib_uverbs_query_srq      cmd;
2249         struct ib_uverbs_query_srq_resp resp;
2250         struct ib_srq_attr              attr;
2251         struct ib_srq                   *srq;
2252         int                             ret;
2253
2254         if (out_len < sizeof resp)
2255                 return -ENOSPC;
2256
2257         if (copy_from_user(&cmd, buf, sizeof cmd))
2258                 return -EFAULT;
2259
2260         srq = idr_read_srq(cmd.srq_handle, file->ucontext);
2261         if (!srq)
2262                 return -EINVAL;
2263
2264         ret = ib_query_srq(srq, &attr);
2265
2266         put_srq_read(srq);
2267
2268         if (ret)
2269                 return ret;
2270
2271         memset(&resp, 0, sizeof resp);
2272
2273         resp.max_wr    = attr.max_wr;
2274         resp.max_sge   = attr.max_sge;
2275         resp.srq_limit = attr.srq_limit;
2276
2277         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2278                          &resp, sizeof resp))
2279                 return -EFAULT;
2280
2281         return in_len;
2282 }
2283
2284 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
2285                               const char __user *buf, int in_len,
2286                               int out_len)
2287 {
2288         struct ib_uverbs_destroy_srq      cmd;
2289         struct ib_uverbs_destroy_srq_resp resp;
2290         struct ib_uobject                *uobj;
2291         struct ib_srq                    *srq;
2292         struct ib_uevent_object          *obj;
2293         int                               ret = -EINVAL;
2294
2295         if (copy_from_user(&cmd, buf, sizeof cmd))
2296                 return -EFAULT;
2297
2298         uobj = idr_write_uobj(&ib_uverbs_srq_idr, cmd.srq_handle, file->ucontext);
2299         if (!uobj)
2300                 return -EINVAL;
2301         srq = uobj->object;
2302         obj = container_of(uobj, struct ib_uevent_object, uobject);
2303
2304         ret = ib_destroy_srq(srq);
2305         if (!ret)
2306                 uobj->live = 0;
2307
2308         put_uobj_write(uobj);
2309
2310         if (ret)
2311                 return ret;
2312
2313         idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
2314
2315         mutex_lock(&file->mutex);
2316         list_del(&uobj->list);
2317         mutex_unlock(&file->mutex);
2318
2319         ib_uverbs_release_uevent(file, obj);
2320
2321         memset(&resp, 0, sizeof resp);
2322         resp.events_reported = obj->events_reported;
2323
2324         put_uobj(uobj);
2325
2326         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2327                          &resp, sizeof resp))
2328                 ret = -EFAULT;
2329
2330         return ret ? ret : in_len;
2331 }
2332
2333 static struct inode *xrc_file2inode(struct file *f)
2334 {
2335         return f->f_dentry->d_inode;
2336 }
2337
2338 struct xrcd_table_entry {
2339         struct rb_node node;
2340         struct inode *inode;
2341         struct ib_xrcd *xrcd;
2342 };
2343
2344 static int xrcd_table_insert(struct ib_device *dev,
2345                              struct inode *i_n,
2346                              struct ib_xrcd *xrcd)
2347 {
2348         struct xrcd_table_entry *entry, *scan;
2349         struct rb_node **p = &dev->ib_uverbs_xrcd_table.rb_node;
2350         struct rb_node *parent = NULL;
2351
2352         entry = kmalloc(sizeof(struct xrcd_table_entry), GFP_KERNEL);
2353         if (!entry)
2354                 return -ENOMEM;
2355
2356         entry->inode = i_n;
2357         entry->xrcd = xrcd;
2358
2359         while (*p) {
2360                 parent = *p;
2361                 scan = rb_entry(parent, struct xrcd_table_entry, node);
2362
2363                 if (i_n < scan->inode)
2364                         p = &(*p)->rb_left;
2365                 else if (i_n > scan->inode)
2366                         p = &(*p)->rb_right;
2367                 else {
2368                         kfree(entry);
2369                         return -EEXIST;
2370                 }
2371         }
2372
2373         rb_link_node(&entry->node, parent, p);
2374         rb_insert_color(&entry->node, &dev->ib_uverbs_xrcd_table);
2375         igrab(i_n);
2376         return 0;
2377 }
2378
2379 static struct xrcd_table_entry *xrcd_table_search(struct ib_device *dev,
2380                                                    struct inode *i_n)
2381 {
2382         struct xrcd_table_entry *scan;
2383         struct rb_node **p = &dev->ib_uverbs_xrcd_table.rb_node;
2384         struct rb_node *parent = NULL;
2385
2386         while (*p) {
2387                 parent = *p;
2388                 scan = rb_entry(parent, struct xrcd_table_entry, node);
2389
2390                 if (i_n < scan->inode)
2391                         p = &(*p)->rb_left;
2392                 else if (i_n > scan->inode)
2393                         p = &(*p)->rb_right;
2394                 else
2395                         return scan;
2396         }
2397         return NULL;
2398 }
2399
2400 static int find_xrcd(struct ib_device *dev, struct inode *i_n,
2401                      struct ib_xrcd **xrcd)
2402 {
2403         struct xrcd_table_entry *entry;
2404
2405         entry = xrcd_table_search(dev, i_n);
2406         if (!entry)
2407                 return -EINVAL;
2408
2409         *xrcd = entry->xrcd;
2410         return 0;
2411 }
2412
2413
2414 static void xrcd_table_delete(struct ib_device *dev,
2415                               struct inode *i_n)
2416 {
2417         struct xrcd_table_entry *entry = xrcd_table_search(dev, i_n);
2418
2419         if (entry) {
2420                 iput(i_n);
2421                 rb_erase(&entry->node, &dev->ib_uverbs_xrcd_table);
2422                 kfree(entry);
2423         }
2424 }
2425
2426 ssize_t ib_uverbs_open_xrc_domain(struct ib_uverbs_file *file,
2427                                   const char __user *buf, int in_len,
2428                                   int out_len)
2429 {
2430         struct ib_uverbs_open_xrc_domain cmd;
2431         struct ib_uverbs_open_xrc_domain_resp resp;
2432         struct ib_udata udata;
2433         struct ib_uobject *uobj;
2434         struct ib_uxrcd_object          *xrcd_uobj;
2435         struct ib_xrcd                  *xrcd = NULL;
2436         struct file                     *f = NULL;
2437         struct inode                    *inode = NULL;
2438         int                              ret = 0;
2439         int                              new_xrcd = 0;
2440
2441         if (out_len < sizeof resp)
2442                 return -ENOSPC;
2443
2444         if (copy_from_user(&cmd, buf, sizeof cmd))
2445                 return -EFAULT;
2446
2447         INIT_UDATA(&udata, buf + sizeof cmd,
2448                    (unsigned long) cmd.response + sizeof resp,
2449                    in_len - sizeof cmd, out_len - sizeof resp);
2450
2451         mutex_lock(&file->device->ib_dev->xrcd_table_mutex);
2452         if (cmd.fd != (u32) (-1)) {
2453                 /* search for file descriptor */
2454                 f = fget(cmd.fd);
2455                 if (!f) {
2456                         ret = -EBADF;
2457                         goto err_table_mutex_unlock;
2458                 }
2459
2460                 inode = xrc_file2inode(f);
2461                 if (!inode) {
2462                         ret = -EBADF;
2463                         goto err_table_mutex_unlock;
2464                 }
2465
2466                 ret = find_xrcd(file->device->ib_dev, inode, &xrcd);
2467                 if (ret && !(cmd.oflags & O_CREAT)) {
2468                         /* no file descriptor. Need CREATE flag */
2469                         ret = -EAGAIN;
2470                         goto err_table_mutex_unlock;
2471                 }
2472
2473                 if (xrcd && cmd.oflags & O_EXCL) {
2474                         ret = -EINVAL;
2475                         goto err_table_mutex_unlock;
2476                 }
2477         }
2478
2479         xrcd_uobj = kmalloc(sizeof *xrcd_uobj, GFP_KERNEL);
2480         if (!xrcd_uobj) {
2481                 ret = -ENOMEM;
2482                 goto err_table_mutex_unlock;
2483         }
2484
2485         uobj = &xrcd_uobj->uobject;
2486         init_uobj(uobj, 0, file->ucontext, &pd_lock_key);
2487         down_write(&uobj->mutex);
2488
2489         if (!xrcd) {
2490                 xrcd = file->device->ib_dev->alloc_xrcd(file->device->ib_dev,
2491                                                         file->ucontext, &udata);
2492                 if (IS_ERR(xrcd)) {
2493                         ret = PTR_ERR(xrcd);
2494                         goto err;
2495                 }
2496                 xrcd->uobject = (cmd.fd == -1) ? uobj : NULL;
2497                 xrcd->inode = inode;
2498                 xrcd->device  = file->device->ib_dev;
2499                 atomic_set(&xrcd->usecnt, 0);
2500                 new_xrcd = 1;
2501         }
2502
2503         uobj->object = xrcd;
2504         ret = idr_add_uobj(&ib_uverbs_xrc_domain_idr, uobj);
2505         if (ret)
2506                 goto err_idr;
2507
2508         memset(&resp, 0, sizeof resp);
2509         resp.xrcd_handle = uobj->id;
2510
2511         if (inode) {
2512                 if (new_xrcd) {
2513                 /* create new inode/xrcd table entry */
2514                         ret = xrcd_table_insert(file->device->ib_dev, inode, xrcd);
2515                         if (ret)
2516                                 goto err_insert_xrcd;
2517                 }
2518                 atomic_inc(&xrcd->usecnt);
2519         }
2520         if (f)
2521                 fput(f);
2522
2523         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2524                          &resp, sizeof resp)) {
2525                 ret = -EFAULT;
2526                 goto err_copy;
2527         }
2528
2529         INIT_LIST_HEAD(&xrcd_uobj->xrc_reg_qp_list);
2530
2531         mutex_lock(&file->mutex);
2532         list_add_tail(&uobj->list, &file->ucontext->xrcd_list);
2533         mutex_unlock(&file->mutex);
2534
2535         uobj->live = 1;
2536
2537         up_write(&uobj->mutex);
2538
2539         mutex_unlock(&file->device->ib_dev->xrcd_table_mutex);
2540         return in_len;
2541
2542 err_copy:
2543
2544         if (inode) {
2545                 if (new_xrcd)
2546                         xrcd_table_delete(file->device->ib_dev, inode);
2547                 atomic_dec(&xrcd->usecnt);
2548         }
2549
2550 err_insert_xrcd:
2551         idr_remove_uobj(&ib_uverbs_xrc_domain_idr, uobj);
2552
2553 err_idr:
2554         ib_dealloc_xrcd(xrcd);
2555
2556 err:
2557         put_uobj_write(uobj);
2558
2559 err_table_mutex_unlock:
2560
2561         if (f)
2562                 fput(f);
2563         mutex_unlock(&file->device->ib_dev->xrcd_table_mutex);
2564         return ret;
2565 }
2566
2567 ssize_t ib_uverbs_close_xrc_domain(struct ib_uverbs_file *file,
2568                                    const char __user *buf, int in_len,
2569                                    int out_len)
2570 {
2571         struct ib_uverbs_close_xrc_domain cmd;
2572         struct ib_uobject *uobj, *t_uobj;
2573         struct ib_uxrcd_object *xrcd_uobj;
2574         struct ib_xrcd *xrcd = NULL;
2575         struct inode *inode = NULL;
2576         int ret = 0;
2577
2578         if (copy_from_user(&cmd, buf, sizeof cmd))
2579                 return -EFAULT;
2580
2581         mutex_lock(&file->device->ib_dev->xrcd_table_mutex);
2582         uobj = idr_write_uobj(&ib_uverbs_xrc_domain_idr, cmd.xrcd_handle,
2583                               file->ucontext);
2584         if (!uobj) {
2585                 ret = -EINVAL;
2586                 goto err_unlock_mutex;
2587         }
2588
2589         mutex_lock(&file->mutex);
2590         if (!ret) {
2591                 list_for_each_entry(t_uobj, &file->ucontext->qp_list, list) {
2592                         struct ib_qp *qp = t_uobj->object;
2593                         if (qp->xrcd && qp->xrcd == uobj->object) {
2594                                 ret = -EBUSY;
2595                                 break;
2596                         }
2597                 }
2598         }
2599         if (!ret) {
2600                 list_for_each_entry(t_uobj, &file->ucontext->srq_list, list) {
2601                         struct ib_srq *srq = t_uobj->object;
2602                         if (srq->ext.xrc.xrcd && srq->ext.xrc.xrcd == uobj->object) {
2603                                 ret = -EBUSY;
2604                                 break;
2605                         }
2606                 }
2607         }
2608         mutex_unlock(&file->mutex);
2609         if (ret) {
2610                 put_uobj_write(uobj);
2611                 goto err_unlock_mutex;
2612         }
2613
2614         xrcd_uobj = container_of(uobj, struct ib_uxrcd_object, uobject);
2615         if (!list_empty(&xrcd_uobj->xrc_reg_qp_list)) {
2616                 ret = -EBUSY;
2617                 put_uobj_write(uobj);
2618                 goto err_unlock_mutex;
2619         }
2620
2621         xrcd = (struct ib_xrcd *) (uobj->object);
2622         inode = xrcd->inode;
2623
2624         if (inode)
2625                 atomic_dec(&xrcd->usecnt);
2626
2627         ret = ib_dealloc_xrcd(uobj->object);
2628         if (!ret)
2629                 uobj->live = 0;
2630
2631         put_uobj_write(uobj);
2632
2633         if (ret && !inode)
2634                 goto err_unlock_mutex;
2635
2636         if (!ret && inode)
2637                 xrcd_table_delete(file->device->ib_dev, inode);
2638
2639         idr_remove_uobj(&ib_uverbs_xrc_domain_idr, uobj);
2640
2641         mutex_lock(&file->mutex);
2642         list_del(&uobj->list);
2643         mutex_unlock(&file->mutex);
2644
2645         put_uobj(uobj);
2646
2647         mutex_unlock(&file->device->ib_dev->xrcd_table_mutex);
2648         return in_len;
2649
2650 err_unlock_mutex:
2651         mutex_unlock(&file->device->ib_dev->xrcd_table_mutex);
2652         return ret;
2653 }
2654
2655 void ib_uverbs_dealloc_xrcd(struct ib_device *ib_dev,
2656                             struct ib_xrcd *xrcd)
2657 {
2658         struct inode *inode = NULL;
2659         int ret = 0;
2660
2661         inode = xrcd->inode;
2662         if (inode)
2663                 atomic_dec(&xrcd->usecnt);
2664
2665         ret = ib_dealloc_xrcd(xrcd);
2666         if (!ret && inode)
2667                 xrcd_table_delete(ib_dev, inode);
2668 }
2669
2670 ssize_t ib_uverbs_create_xrc_rcv_qp(struct ib_uverbs_file *file,
2671                                     const char __user *buf, int in_len,
2672                                     int out_len)
2673 {
2674         struct ib_uverbs_create_xrc_rcv_qp      cmd;
2675         struct ib_uverbs_create_xrc_rcv_qp_resp resp;
2676         struct ib_uxrc_rcv_object      *obj;
2677         struct ib_qp_init_attr          init_attr;
2678         struct ib_xrcd                 *xrcd;
2679         struct ib_uobject              *uobj;
2680         struct ib_uxrcd_object         *xrcd_uobj;
2681         u32                             qp_num;
2682         int                             err;
2683
2684         if (out_len < sizeof resp)
2685                 return -ENOSPC;
2686
2687         if (copy_from_user(&cmd, buf, sizeof cmd))
2688                 return -EFAULT;
2689
2690         obj = kzalloc(sizeof *obj, GFP_KERNEL);
2691         if (!obj)
2692                 return -ENOMEM;
2693
2694         xrcd = idr_read_xrcd(cmd.xrc_domain_handle, file->ucontext, &uobj);
2695         if (!xrcd) {
2696                 err = -EINVAL;
2697                 goto err_out;
2698         }
2699
2700         init_attr.event_handler = ib_uverbs_xrc_rcv_qp_event_handler;
2701         init_attr.qp_context    = file;
2702         init_attr.srq           = NULL;
2703         init_attr.sq_sig_type   =
2704                 cmd.sq_sig_all ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR;
2705         init_attr.qp_type       = IB_QPT_XRC;
2706         init_attr.xrcd  = xrcd;
2707
2708         init_attr.cap.max_send_wr       = 1;
2709         init_attr.cap.max_recv_wr       = 0;
2710         init_attr.cap.max_send_sge      = 1;
2711         init_attr.cap.max_recv_sge      = 0;
2712         init_attr.cap.max_inline_data   = 0;
2713
2714         err = xrcd->device->create_xrc_rcv_qp(&init_attr, &qp_num);
2715         if (err)
2716                 goto err_put;
2717
2718         memset(&resp, 0, sizeof resp);
2719         resp.qpn = qp_num;
2720
2721         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2722                          &resp, sizeof resp)) {
2723                 err = -EFAULT;
2724                 goto err_destroy;
2725         }
2726
2727         atomic_inc(&xrcd->usecnt);
2728         put_xrcd_read(uobj);
2729         obj->qp_num = qp_num;
2730         obj->domain_handle = cmd.xrc_domain_handle;
2731         xrcd_uobj = container_of(uobj, struct ib_uxrcd_object, uobject);
2732         mutex_lock(&file->device->ib_dev->xrcd_table_mutex);
2733         list_add_tail(&obj->list, &xrcd_uobj->xrc_reg_qp_list);
2734         mutex_unlock(&file->device->ib_dev->xrcd_table_mutex);
2735
2736         return in_len;
2737
2738 err_destroy:
2739         xrcd->device->unreg_xrc_rcv_qp(xrcd, file, qp_num);
2740 err_put:
2741         put_xrcd_read(uobj);
2742 err_out:
2743         kfree(obj);
2744         return err;
2745 }
2746
2747 ssize_t ib_uverbs_modify_xrc_rcv_qp(struct ib_uverbs_file *file,
2748                                     const char __user *buf, int in_len,
2749                                     int out_len)
2750 {
2751         struct ib_uverbs_modify_xrc_rcv_qp      cmd;
2752         struct ib_qp_attr              *attr;
2753         struct ib_xrcd                 *xrcd;
2754         struct ib_uobject              *uobj;
2755         int                             err;
2756
2757         if (copy_from_user(&cmd, buf, sizeof cmd))
2758                 return -EFAULT;
2759
2760         attr = kzalloc(sizeof *attr, GFP_KERNEL);
2761         if (!attr)
2762                 return -ENOMEM;
2763
2764         xrcd = idr_read_xrcd(cmd.xrc_domain_handle, file->ucontext, &uobj);
2765         if (!xrcd) {
2766                 kfree(attr);
2767                 return -EINVAL;
2768         }
2769
2770         attr->qp_state            = cmd.qp_state;
2771         attr->cur_qp_state        = cmd.cur_qp_state;
2772         attr->qp_access_flags     = cmd.qp_access_flags;
2773         attr->pkey_index          = cmd.pkey_index;
2774         attr->port_num            = cmd.port_num;
2775         attr->path_mtu            = cmd.path_mtu;
2776         attr->path_mig_state      = cmd.path_mig_state;
2777         attr->qkey                = cmd.qkey;
2778         attr->rq_psn              = cmd.rq_psn;
2779         attr->sq_psn              = cmd.sq_psn;
2780         attr->dest_qp_num         = cmd.dest_qp_num;
2781         attr->alt_pkey_index      = cmd.alt_pkey_index;
2782         attr->en_sqd_async_notify = cmd.en_sqd_async_notify;
2783         attr->max_rd_atomic       = cmd.max_rd_atomic;
2784         attr->max_dest_rd_atomic  = cmd.max_dest_rd_atomic;
2785         attr->min_rnr_timer       = cmd.min_rnr_timer;
2786         attr->port_num            = cmd.port_num;
2787         attr->timeout             = cmd.timeout;
2788         attr->retry_cnt           = cmd.retry_cnt;
2789         attr->rnr_retry           = cmd.rnr_retry;
2790         attr->alt_port_num        = cmd.alt_port_num;
2791         attr->alt_timeout         = cmd.alt_timeout;
2792
2793         memcpy(attr->ah_attr.grh.dgid.raw, cmd.dest.dgid, 16);
2794         attr->ah_attr.grh.flow_label        = cmd.dest.flow_label;
2795         attr->ah_attr.grh.sgid_index        = cmd.dest.sgid_index;
2796         attr->ah_attr.grh.hop_limit         = cmd.dest.hop_limit;
2797         attr->ah_attr.grh.traffic_class     = cmd.dest.traffic_class;
2798         attr->ah_attr.dlid                  = cmd.dest.dlid;
2799         attr->ah_attr.sl                    = cmd.dest.sl;
2800         attr->ah_attr.src_path_bits         = cmd.dest.src_path_bits;
2801         attr->ah_attr.static_rate           = cmd.dest.static_rate;
2802         attr->ah_attr.ah_flags              = cmd.dest.is_global ? IB_AH_GRH : 0;
2803         attr->ah_attr.port_num              = cmd.dest.port_num;
2804
2805         memcpy(attr->alt_ah_attr.grh.dgid.raw, cmd.alt_dest.dgid, 16);
2806         attr->alt_ah_attr.grh.flow_label    = cmd.alt_dest.flow_label;
2807         attr->alt_ah_attr.grh.sgid_index    = cmd.alt_dest.sgid_index;
2808         attr->alt_ah_attr.grh.hop_limit     = cmd.alt_dest.hop_limit;
2809         attr->alt_ah_attr.grh.traffic_class = cmd.alt_dest.traffic_class;
2810         attr->alt_ah_attr.dlid              = cmd.alt_dest.dlid;
2811         attr->alt_ah_attr.sl                = cmd.alt_dest.sl;
2812         attr->alt_ah_attr.src_path_bits     = cmd.alt_dest.src_path_bits;
2813         attr->alt_ah_attr.static_rate       = cmd.alt_dest.static_rate;
2814         attr->alt_ah_attr.ah_flags          = cmd.alt_dest.is_global ? IB_AH_GRH : 0;
2815         attr->alt_ah_attr.port_num          = cmd.alt_dest.port_num;
2816
2817         err = xrcd->device->modify_xrc_rcv_qp(xrcd, cmd.qp_num, attr, cmd.attr_mask);
2818         put_xrcd_read(uobj);
2819         kfree(attr);
2820         return err ? err : in_len;
2821 }
2822
2823 ssize_t ib_uverbs_query_xrc_rcv_qp(struct ib_uverbs_file *file,
2824                                    const char __user *buf, int in_len,
2825                                    int out_len)
2826 {
2827         struct ib_uverbs_query_xrc_rcv_qp cmd;
2828         struct ib_uverbs_query_qp_resp   resp;
2829         struct ib_qp_attr               *attr;
2830         struct ib_qp_init_attr          *init_attr;
2831         struct ib_xrcd                  *xrcd;
2832         struct ib_uobject               *uobj;
2833         int                              ret;
2834
2835         if (copy_from_user(&cmd, buf, sizeof cmd))
2836                 return -EFAULT;
2837
2838         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
2839         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
2840         if (!attr || !init_attr) {
2841                 ret = -ENOMEM;
2842                 goto out;
2843         }
2844
2845         xrcd = idr_read_xrcd(cmd.xrc_domain_handle, file->ucontext, &uobj);
2846         if (!xrcd) {
2847                 ret = -EINVAL;
2848                 goto out;
2849         }
2850
2851         ret = xrcd->device->query_xrc_rcv_qp(xrcd, cmd.qp_num, attr,
2852                                              cmd.attr_mask, init_attr);
2853
2854         put_xrcd_read(uobj);
2855
2856         if (ret)
2857                 goto out;
2858
2859         memset(&resp, 0, sizeof resp);
2860         resp.qp_state               = attr->qp_state;
2861         resp.cur_qp_state           = attr->cur_qp_state;
2862         resp.path_mtu               = attr->path_mtu;
2863         resp.path_mig_state         = attr->path_mig_state;
2864         resp.qkey                   = attr->qkey;
2865         resp.rq_psn                 = attr->rq_psn;
2866         resp.sq_psn                 = attr->sq_psn;
2867         resp.dest_qp_num            = attr->dest_qp_num;
2868         resp.qp_access_flags        = attr->qp_access_flags;
2869         resp.pkey_index             = attr->pkey_index;
2870         resp.alt_pkey_index         = attr->alt_pkey_index;
2871         resp.sq_draining            = attr->sq_draining;
2872         resp.max_rd_atomic          = attr->max_rd_atomic;
2873         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
2874         resp.min_rnr_timer          = attr->min_rnr_timer;
2875         resp.port_num               = attr->port_num;
2876         resp.timeout                = attr->timeout;
2877         resp.retry_cnt              = attr->retry_cnt;
2878         resp.rnr_retry              = attr->rnr_retry;
2879         resp.alt_port_num           = attr->alt_port_num;
2880         resp.alt_timeout            = attr->alt_timeout;
2881
2882         memcpy(resp.dest.dgid, attr->ah_attr.grh.dgid.raw, 16);
2883         resp.dest.flow_label        = attr->ah_attr.grh.flow_label;
2884         resp.dest.sgid_index        = attr->ah_attr.grh.sgid_index;
2885         resp.dest.hop_limit         = attr->ah_attr.grh.hop_limit;
2886         resp.dest.traffic_class     = attr->ah_attr.grh.traffic_class;
2887         resp.dest.dlid              = attr->ah_attr.dlid;
2888         resp.dest.sl                = attr->ah_attr.sl;
2889         resp.dest.src_path_bits     = attr->ah_attr.src_path_bits;
2890         resp.dest.static_rate       = attr->ah_attr.static_rate;
2891         resp.dest.is_global         = !!(attr->ah_attr.ah_flags & IB_AH_GRH);
2892         resp.dest.port_num          = attr->ah_attr.port_num;
2893
2894         memcpy(resp.alt_dest.dgid, attr->alt_ah_attr.grh.dgid.raw, 16);
2895         resp.alt_dest.flow_label    = attr->alt_ah_attr.grh.flow_label;
2896         resp.alt_dest.sgid_index    = attr->alt_ah_attr.grh.sgid_index;
2897         resp.alt_dest.hop_limit     = attr->alt_ah_attr.grh.hop_limit;
2898         resp.alt_dest.traffic_class = attr->alt_ah_attr.grh.traffic_class;
2899         resp.alt_dest.dlid          = attr->alt_ah_attr.dlid;
2900         resp.alt_dest.sl            = attr->alt_ah_attr.sl;
2901         resp.alt_dest.src_path_bits = attr->alt_ah_attr.src_path_bits;
2902         resp.alt_dest.static_rate   = attr->alt_ah_attr.static_rate;
2903         resp.alt_dest.is_global     = !!(attr->alt_ah_attr.ah_flags & IB_AH_GRH);
2904         resp.alt_dest.port_num      = attr->alt_ah_attr.port_num;
2905
2906         resp.max_send_wr            = init_attr->cap.max_send_wr;
2907         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
2908         resp.max_send_sge           = init_attr->cap.max_send_sge;
2909         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
2910         resp.max_inline_data        = init_attr->cap.max_inline_data;
2911         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
2912
2913         if (copy_to_user((void __user *) (unsigned long) cmd.response,
2914                          &resp, sizeof resp))
2915                 ret = -EFAULT;
2916
2917 out:
2918         kfree(attr);
2919         kfree(init_attr);
2920
2921         return ret ? ret : in_len;
2922 }
2923
2924 ssize_t ib_uverbs_reg_xrc_rcv_qp(struct ib_uverbs_file *file,
2925                                  const char __user *buf, int in_len,
2926                                  int out_len)
2927 {
2928         struct ib_uverbs_reg_xrc_rcv_qp  cmd;
2929         struct ib_uxrc_rcv_object       *qp_obj, *tmp;
2930         struct ib_xrcd                  *xrcd;
2931         struct ib_uobject               *uobj;
2932         struct ib_uxrcd_object          *xrcd_uobj;
2933         int                              ret;
2934
2935         if (copy_from_user(&cmd, buf, sizeof cmd))
2936                 return -EFAULT;
2937
2938         qp_obj = kmalloc(sizeof *qp_obj, GFP_KERNEL);
2939         if (!qp_obj)
2940                 return -ENOMEM;
2941
2942         xrcd = idr_read_xrcd(cmd.xrc_domain_handle, file->ucontext, &uobj);
2943         if (!xrcd) {
2944                 ret = -EINVAL;
2945                 goto err_out;
2946         }
2947
2948         ret = xrcd->device->reg_xrc_rcv_qp(xrcd, file, cmd.qp_num);
2949         if (ret)
2950                 goto err_put;
2951
2952         xrcd_uobj = container_of(uobj, struct ib_uxrcd_object, uobject);
2953         mutex_lock(&file->device->ib_dev->xrcd_table_mutex);
2954         list_for_each_entry(tmp, &xrcd_uobj->xrc_reg_qp_list, list)
2955                 if (cmd.qp_num == tmp->qp_num) {
2956                         kfree(qp_obj);
2957                         mutex_unlock(&file->device->ib_dev->xrcd_table_mutex);
2958                         put_xrcd_read(uobj);
2959                         return in_len;
2960                 }
2961         qp_obj->qp_num = cmd.qp_num;
2962         qp_obj->domain_handle = cmd.xrc_domain_handle;
2963         list_add_tail(&qp_obj->list, &xrcd_uobj->xrc_reg_qp_list);
2964         mutex_unlock(&file->device->ib_dev->xrcd_table_mutex);
2965         atomic_inc(&xrcd->usecnt);
2966         put_xrcd_read(uobj);
2967         return in_len;
2968
2969 err_put:
2970         put_xrcd_read(uobj);
2971 err_out:
2972
2973         kfree(qp_obj);
2974         return ret;
2975 }
2976
2977 int ib_uverbs_cleanup_xrc_rcv_qp(struct ib_uverbs_file *file,
2978                                  struct ib_xrcd *xrcd, u32 qp_num)
2979 {
2980         int err;
2981         err = xrcd->device->unreg_xrc_rcv_qp(xrcd, file, qp_num);
2982         if (!err)
2983                 atomic_dec(&xrcd->usecnt);
2984         return err;
2985 }
2986
2987 ssize_t ib_uverbs_unreg_xrc_rcv_qp(struct ib_uverbs_file *file,
2988                                    const char __user *buf, int in_len,
2989                                    int out_len)
2990 {
2991         struct ib_uverbs_unreg_xrc_rcv_qp cmd;
2992         struct ib_uxrc_rcv_object *qp_obj, *tmp;
2993         struct ib_xrcd *xrcd;
2994         struct ib_uobject *uobj;
2995         struct ib_uxrcd_object *xrcd_uobj;
2996         int ret;
2997
2998         if (copy_from_user(&cmd, buf, sizeof cmd))
2999                 return -EFAULT;
3000
3001         xrcd = idr_read_xrcd(cmd.xrc_domain_handle, file->ucontext, &uobj);
3002         if (!xrcd)
3003                 return -EINVAL;
3004
3005         ret = xrcd->device->unreg_xrc_rcv_qp(xrcd, file, cmd.qp_num);
3006         if (ret) {
3007                 put_xrcd_read(uobj);
3008                 return -EINVAL;
3009         }
3010         atomic_dec(&xrcd->usecnt);
3011
3012         xrcd_uobj = container_of(uobj, struct ib_uxrcd_object, uobject);
3013         mutex_lock(&file->device->ib_dev->xrcd_table_mutex);
3014         list_for_each_entry_safe(qp_obj, tmp, &xrcd_uobj->xrc_reg_qp_list, list)
3015                 if (cmd.qp_num == qp_obj->qp_num) {
3016                         list_del(&qp_obj->list);
3017                         kfree(qp_obj);
3018                         break;
3019                 }
3020         mutex_unlock(&file->device->ib_dev->xrcd_table_mutex);
3021         put_xrcd_read(uobj);
3022         return in_len;
3023 }