drivers/infiniband/core/uverbs_std_types.c

   1 /*
   2  * Copyright (c) 2017, Mellanox Technologies inc.  All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #include <rdma/uverbs_std_types.h>
  34 #include <rdma/ib_user_verbs.h>
  35 #include <rdma/ib_verbs.h>
  36 #include <linux/bug.h>
  37 #include <linux/file.h>
  38 #include <rdma/restrack.h>
  39 #include "rdma_core.h"
  40 #include "uverbs.h"
  41
  42 static int uverbs_free_ah(struct ib_uobject *uobject,
  43                           enum rdma_remove_reason why)
  44 {
  45         return rdma_destroy_ah((struct ib_ah *)uobject->object);
  46 }
  47
  48 static int uverbs_free_flow(struct ib_uobject *uobject,
  49                             enum rdma_remove_reason why)
  50 {
  51         struct ib_flow *flow = (struct ib_flow *)uobject->object;
  52         struct ib_uflow_object *uflow =
  53                 container_of(uobject, struct ib_uflow_object, uobject);
  54         struct ib_qp *qp = flow->qp;
  55         int ret;
  56
  57         ret = flow->device->destroy_flow(flow);
  58         if (!ret) {
  59                 if (qp)
  60                         atomic_dec(&qp->usecnt);
  61                 ib_uverbs_flow_resources_free(uflow->resources);
  62         }
  63
  64         return ret;
  65 }
  66
  67 static int uverbs_free_mw(struct ib_uobject *uobject,
  68                           enum rdma_remove_reason why)
  69 {
  70         return uverbs_dealloc_mw((struct ib_mw *)uobject->object);
  71 }
  72
  73 static int uverbs_free_qp(struct ib_uobject *uobject,
  74                           enum rdma_remove_reason why)
  75 {
  76         struct ib_qp *qp = uobject->object;
  77         struct ib_uqp_object *uqp =
  78                 container_of(uobject, struct ib_uqp_object, uevent.uobject);
  79         int ret;
  80
  81         /*
  82          * If this is a user triggered destroy then do not allow destruction
  83          * until the user cleans up all the mcast bindings. Unlike in other
  84          * places we forcibly clean up the mcast attachments for !DESTROY
  85          * because the mcast attaches are not ubojects and will not be
  86          * destroyed by anything else during cleanup processing.
  87          */
  88         if (why == RDMA_REMOVE_DESTROY) {
  89                 if (!list_empty(&uqp->mcast_list))
  90                         return -EBUSY;
  91         } else if (qp == qp->real_qp) {
  92                 ib_uverbs_detach_umcast(qp, uqp);
  93         }
  94
  95         ret = ib_destroy_qp(qp);
  96         if (ib_is_destroy_retryable(ret, why, uobject))
  97                 return ret;
  98
  99         if (uqp->uxrcd)
 100                 atomic_dec(&uqp->uxrcd->refcnt);
 101
 102         ib_uverbs_release_uevent(uobject->context->ufile, &uqp->uevent);
 103         return ret;
 104 }
 105
 106 static int uverbs_free_rwq_ind_tbl(struct ib_uobject *uobject,
 107                                    enum rdma_remove_reason why)
 108 {
 109         struct ib_rwq_ind_table *rwq_ind_tbl = uobject->object;
 110         struct ib_wq **ind_tbl = rwq_ind_tbl->ind_tbl;
 111         int ret;
 112
 113         ret = ib_destroy_rwq_ind_table(rwq_ind_tbl);
 114         if (ib_is_destroy_retryable(ret, why, uobject))
 115                 return ret;
 116
 117         kfree(ind_tbl);
 118         return ret;
 119 }
 120
 121 static int uverbs_free_wq(struct ib_uobject *uobject,
 122                           enum rdma_remove_reason why)
 123 {
 124         struct ib_wq *wq = uobject->object;
 125         struct ib_uwq_object *uwq =
 126                 container_of(uobject, struct ib_uwq_object, uevent.uobject);
 127         int ret;
 128
 129         ret = ib_destroy_wq(wq);
 130         if (ib_is_destroy_retryable(ret, why, uobject))
 131                 return ret;
 132
 133         ib_uverbs_release_uevent(uobject->context->ufile, &uwq->uevent);
 134         return ret;
 135 }
 136
 137 static int uverbs_free_srq(struct ib_uobject *uobject,
 138                            enum rdma_remove_reason why)
 139 {
 140         struct ib_srq *srq = uobject->object;
 141         struct ib_uevent_object *uevent =
 142                 container_of(uobject, struct ib_uevent_object, uobject);
 143         enum ib_srq_type  srq_type = srq->srq_type;
 144         int ret;
 145
 146         ret = ib_destroy_srq(srq);
 147         if (ib_is_destroy_retryable(ret, why, uobject))
 148                 return ret;
 149
 150         if (srq_type == IB_SRQT_XRC) {
 151                 struct ib_usrq_object *us =
 152                         container_of(uevent, struct ib_usrq_object, uevent);
 153
 154                 atomic_dec(&us->uxrcd->refcnt);
 155         }
 156
 157         ib_uverbs_release_uevent(uobject->context->ufile, uevent);
 158         return ret;
 159 }
 160
 161 static int uverbs_free_xrcd(struct ib_uobject *uobject,
 162                             enum rdma_remove_reason why)
 163 {
 164         struct ib_xrcd *xrcd = uobject->object;
 165         struct ib_uxrcd_object *uxrcd =
 166                 container_of(uobject, struct ib_uxrcd_object, uobject);
 167         int ret;
 168
 169         ret = ib_destroy_usecnt(&uxrcd->refcnt, why, uobject);
 170         if (ret)
 171                 return ret;
 172
 173         mutex_lock(&uobject->context->ufile->device->xrcd_tree_mutex);
 174         ret = ib_uverbs_dealloc_xrcd(uobject, xrcd, why);
 175         mutex_unlock(&uobject->context->ufile->device->xrcd_tree_mutex);
 176
 177         return ret;
 178 }
 179
 180 static int uverbs_free_pd(struct ib_uobject *uobject,
 181                           enum rdma_remove_reason why)
 182 {
 183         struct ib_pd *pd = uobject->object;
 184         int ret;
 185
 186         ret = ib_destroy_usecnt(&pd->usecnt, why, uobject);
 187         if (ret)
 188                 return ret;
 189
 190         ib_dealloc_pd((struct ib_pd *)uobject->object);
 191         return 0;
 192 }
 193
 194 static int uverbs_hot_unplug_completion_event_file(struct ib_uobject *uobj,
 195                                                    enum rdma_remove_reason why)
 196 {
 197         struct ib_uverbs_completion_event_file *comp_event_file =
 198                 container_of(uobj, struct ib_uverbs_completion_event_file,
 199                              uobj);
 200         struct ib_uverbs_event_queue *event_queue = &comp_event_file->ev_queue;
 201
 202         spin_lock_irq(&event_queue->lock);
 203         event_queue->is_closed = 1;
 204         spin_unlock_irq(&event_queue->lock);
 205
 206         if (why == RDMA_REMOVE_DRIVER_REMOVE) {
 207                 wake_up_interruptible(&event_queue->poll_wait);
 208                 kill_fasync(&event_queue->async_queue, SIGIO, POLL_IN);
 209         }
 210         return 0;
 211 };
 212
 213 int uverbs_destroy_def_handler(struct ib_uverbs_file *file,
 214                                struct uverbs_attr_bundle *attrs)
 215 {
 216         return 0;
 217 }
 218 EXPORT_SYMBOL(uverbs_destroy_def_handler);
 219
 220 DECLARE_UVERBS_NAMED_OBJECT(
 221         UVERBS_OBJECT_COMP_CHANNEL,
 222         UVERBS_TYPE_ALLOC_FD(sizeof(struct ib_uverbs_completion_event_file),
 223                              uverbs_hot_unplug_completion_event_file,
 224                              &uverbs_event_fops,
 225                              "[infinibandevent]",
 226                              O_RDONLY));
 227
 228 DECLARE_UVERBS_NAMED_OBJECT(
 229         UVERBS_OBJECT_QP,
 230         UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uqp_object), uverbs_free_qp));
 231
 232 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_MW,
 233                             UVERBS_TYPE_ALLOC_IDR(uverbs_free_mw));
 234
 235 DECLARE_UVERBS_NAMED_OBJECT(
 236         UVERBS_OBJECT_SRQ,
 237         UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_usrq_object),
 238                                  uverbs_free_srq));
 239
 240 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_AH,
 241                             UVERBS_TYPE_ALLOC_IDR(uverbs_free_ah));
 242
 243 DECLARE_UVERBS_NAMED_OBJECT(
 244         UVERBS_OBJECT_FLOW,
 245         UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uflow_object),
 246                                  uverbs_free_flow));
 247
 248 DECLARE_UVERBS_NAMED_OBJECT(
 249         UVERBS_OBJECT_WQ,
 250         UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uwq_object), uverbs_free_wq));
 251
 252 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_RWQ_IND_TBL,
 253                             UVERBS_TYPE_ALLOC_IDR(uverbs_free_rwq_ind_tbl));
 254
 255 DECLARE_UVERBS_NAMED_OBJECT(
 256         UVERBS_OBJECT_XRCD,
 257         UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uxrcd_object),
 258                                  uverbs_free_xrcd));
 259
 260 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_PD,
 261                             UVERBS_TYPE_ALLOC_IDR(uverbs_free_pd));
 262
 263 DECLARE_UVERBS_GLOBAL_METHODS(UVERBS_OBJECT_DEVICE);
 264
 265 DECLARE_UVERBS_OBJECT_TREE(uverbs_default_objects,
 266                            &UVERBS_OBJECT(UVERBS_OBJECT_DEVICE),
 267                            &UVERBS_OBJECT(UVERBS_OBJECT_PD),
 268                            &UVERBS_OBJECT(UVERBS_OBJECT_MR),
 269                            &UVERBS_OBJECT(UVERBS_OBJECT_COMP_CHANNEL),
 270                            &UVERBS_OBJECT(UVERBS_OBJECT_CQ),
 271                            &UVERBS_OBJECT(UVERBS_OBJECT_QP),
 272                            &UVERBS_OBJECT(UVERBS_OBJECT_AH),
 273                            &UVERBS_OBJECT(UVERBS_OBJECT_MW),
 274                            &UVERBS_OBJECT(UVERBS_OBJECT_SRQ),
 275                            &UVERBS_OBJECT(UVERBS_OBJECT_FLOW),
 276                            &UVERBS_OBJECT(UVERBS_OBJECT_WQ),
 277                            &UVERBS_OBJECT(UVERBS_OBJECT_RWQ_IND_TBL),
 278                            &UVERBS_OBJECT(UVERBS_OBJECT_XRCD),
 279                            &UVERBS_OBJECT(UVERBS_OBJECT_FLOW_ACTION),
 280                            &UVERBS_OBJECT(UVERBS_OBJECT_DM),
 281                            &UVERBS_OBJECT(UVERBS_OBJECT_COUNTERS));
 282
 283 const struct uverbs_object_tree_def *uverbs_default_get_objects(void)
 284 {
 285         return &uverbs_default_objects;
 286 }