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_core.h"
  39 #include "uverbs.h"
  40
  41 static int uverbs_free_ah(struct ib_uobject *uobject,
  42                           enum rdma_remove_reason why)
  43 {
  44         return ib_destroy_ah((struct ib_ah *)uobject->object);
  45 }
  46
  47 static int uverbs_free_flow(struct ib_uobject *uobject,
  48                             enum rdma_remove_reason why)
  49 {
  50         return ib_destroy_flow((struct ib_flow *)uobject->object);
  51 }
  52
  53 static int uverbs_free_mw(struct ib_uobject *uobject,
  54                           enum rdma_remove_reason why)
  55 {
  56         return uverbs_dealloc_mw((struct ib_mw *)uobject->object);
  57 }
  58
  59 static int uverbs_free_qp(struct ib_uobject *uobject,
  60                           enum rdma_remove_reason why)
  61 {
  62         struct ib_qp *qp = uobject->object;
  63         struct ib_uqp_object *uqp =
  64                 container_of(uobject, struct ib_uqp_object, uevent.uobject);
  65         int ret;
  66
  67         if (why == RDMA_REMOVE_DESTROY) {
  68                 if (!list_empty(&uqp->mcast_list))
  69                         return -EBUSY;
  70         } else if (qp == qp->real_qp) {
  71                 ib_uverbs_detach_umcast(qp, uqp);
  72         }
  73
  74         ret = ib_destroy_qp(qp);
  75         if (ret && why == RDMA_REMOVE_DESTROY)
  76                 return ret;
  77
  78         if (uqp->uxrcd)
  79                 atomic_dec(&uqp->uxrcd->refcnt);
  80
  81         ib_uverbs_release_uevent(uobject->context->ufile, &uqp->uevent);
  82         return ret;
  83 }
  84
  85 static int uverbs_free_rwq_ind_tbl(struct ib_uobject *uobject,
  86                                    enum rdma_remove_reason why)
  87 {
  88         struct ib_rwq_ind_table *rwq_ind_tbl = uobject->object;
  89         struct ib_wq **ind_tbl = rwq_ind_tbl->ind_tbl;
  90         int ret;
  91
  92         ret = ib_destroy_rwq_ind_table(rwq_ind_tbl);
  93         if (!ret || why != RDMA_REMOVE_DESTROY)
  94                 kfree(ind_tbl);
  95         return ret;
  96 }
  97
  98 static int uverbs_free_wq(struct ib_uobject *uobject,
  99                           enum rdma_remove_reason why)
 100 {
 101         struct ib_wq *wq = uobject->object;
 102         struct ib_uwq_object *uwq =
 103                 container_of(uobject, struct ib_uwq_object, uevent.uobject);
 104         int ret;
 105
 106         ret = ib_destroy_wq(wq);
 107         if (!ret || why != RDMA_REMOVE_DESTROY)
 108                 ib_uverbs_release_uevent(uobject->context->ufile, &uwq->uevent);
 109         return ret;
 110 }
 111
 112 static int uverbs_free_srq(struct ib_uobject *uobject,
 113                            enum rdma_remove_reason why)
 114 {
 115         struct ib_srq *srq = uobject->object;
 116         struct ib_uevent_object *uevent =
 117                 container_of(uobject, struct ib_uevent_object, uobject);
 118         enum ib_srq_type  srq_type = srq->srq_type;
 119         int ret;
 120
 121         ret = ib_destroy_srq(srq);
 122
 123         if (ret && why == RDMA_REMOVE_DESTROY)
 124                 return ret;
 125
 126         if (srq_type == IB_SRQT_XRC) {
 127                 struct ib_usrq_object *us =
 128                         container_of(uevent, struct ib_usrq_object, uevent);
 129
 130                 atomic_dec(&us->uxrcd->refcnt);
 131         }
 132
 133         ib_uverbs_release_uevent(uobject->context->ufile, uevent);
 134         return ret;
 135 }
 136
 137 static int uverbs_free_cq(struct ib_uobject *uobject,
 138                           enum rdma_remove_reason why)
 139 {
 140         struct ib_cq *cq = uobject->object;
 141         struct ib_uverbs_event_queue *ev_queue = cq->cq_context;
 142         struct ib_ucq_object *ucq =
 143                 container_of(uobject, struct ib_ucq_object, uobject);
 144         int ret;
 145
 146         ret = ib_destroy_cq(cq);
 147         if (!ret || why != RDMA_REMOVE_DESTROY)
 148                 ib_uverbs_release_ucq(uobject->context->ufile, ev_queue ?
 149                                       container_of(ev_queue,
 150                                                    struct ib_uverbs_completion_event_file,
 151                                                    ev_queue) : NULL,
 152                                       ucq);
 153         return ret;
 154 }
 155
 156 static int uverbs_free_mr(struct ib_uobject *uobject,
 157                           enum rdma_remove_reason why)
 158 {
 159         return ib_dereg_mr((struct ib_mr *)uobject->object);
 160 }
 161
 162 static int uverbs_free_xrcd(struct ib_uobject *uobject,
 163                             enum rdma_remove_reason why)
 164 {
 165         struct ib_xrcd *xrcd = uobject->object;
 166         struct ib_uxrcd_object *uxrcd =
 167                 container_of(uobject, struct ib_uxrcd_object, uobject);
 168         int ret;
 169
 170         mutex_lock(&uobject->context->ufile->device->xrcd_tree_mutex);
 171         if (why == RDMA_REMOVE_DESTROY && atomic_read(&uxrcd->refcnt))
 172                 ret = -EBUSY;
 173         else
 174                 ret = ib_uverbs_dealloc_xrcd(uobject->context->ufile->device,
 175                                              xrcd, why);
 176         mutex_unlock(&uobject->context->ufile->device->xrcd_tree_mutex);
 177
 178         return ret;
 179 }
 180
 181 static int uverbs_free_pd(struct ib_uobject *uobject,
 182                           enum rdma_remove_reason why)
 183 {
 184         struct ib_pd *pd = uobject->object;
 185
 186         if (why == RDMA_REMOVE_DESTROY && atomic_read(&pd->usecnt))
 187                 return -EBUSY;
 188
 189         ib_dealloc_pd((struct ib_pd *)uobject->object);
 190         return 0;
 191 }
 192
 193 static int uverbs_hot_unplug_completion_event_file(struct ib_uobject_file *uobj_file,
 194                                                    enum rdma_remove_reason why)
 195 {
 196         struct ib_uverbs_completion_event_file *comp_event_file =
 197                 container_of(uobj_file, struct ib_uverbs_completion_event_file,
 198                              uobj_file);
 199         struct ib_uverbs_event_queue *event_queue = &comp_event_file->ev_queue;
 200
 201         spin_lock_irq(&event_queue->lock);
 202         event_queue->is_closed = 1;
 203         spin_unlock_irq(&event_queue->lock);
 204
 205         if (why == RDMA_REMOVE_DRIVER_REMOVE) {
 206                 wake_up_interruptible(&event_queue->poll_wait);
 207                 kill_fasync(&event_queue->async_queue, SIGIO, POLL_IN);
 208         }
 209         return 0;
 210 };
 211
 212 const struct uverbs_obj_fd_type uverbs_type_attrs_comp_channel = {
 213         .type = UVERBS_TYPE_ALLOC_FD(sizeof(struct ib_uverbs_completion_event_file), 0),
 214         .context_closed = uverbs_hot_unplug_completion_event_file,
 215         .fops = &uverbs_event_fops,
 216         .name = "[infinibandevent]",
 217         .flags = O_RDONLY,
 218 };
 219
 220 const struct uverbs_obj_idr_type uverbs_type_attrs_cq = {
 221         .type = UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_ucq_object), 0),
 222         .destroy_object = uverbs_free_cq,
 223 };
 224
 225 const struct uverbs_obj_idr_type uverbs_type_attrs_qp = {
 226         .type = UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uqp_object), 0),
 227         .destroy_object = uverbs_free_qp,
 228 };
 229
 230 const struct uverbs_obj_idr_type uverbs_type_attrs_mw = {
 231         .type = UVERBS_TYPE_ALLOC_IDR(0),
 232         .destroy_object = uverbs_free_mw,
 233 };
 234
 235 const struct uverbs_obj_idr_type uverbs_type_attrs_mr = {
 236         /* 1 is used in order to free the MR after all the MWs */
 237         .type = UVERBS_TYPE_ALLOC_IDR(1),
 238         .destroy_object = uverbs_free_mr,
 239 };
 240
 241 const struct uverbs_obj_idr_type uverbs_type_attrs_srq = {
 242         .type = UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_usrq_object), 0),
 243         .destroy_object = uverbs_free_srq,
 244 };
 245
 246 const struct uverbs_obj_idr_type uverbs_type_attrs_ah = {
 247         .type = UVERBS_TYPE_ALLOC_IDR(0),
 248         .destroy_object = uverbs_free_ah,
 249 };
 250
 251 const struct uverbs_obj_idr_type uverbs_type_attrs_flow = {
 252         .type = UVERBS_TYPE_ALLOC_IDR(0),
 253         .destroy_object = uverbs_free_flow,
 254 };
 255
 256 const struct uverbs_obj_idr_type uverbs_type_attrs_wq = {
 257         .type = UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uwq_object), 0),
 258         .destroy_object = uverbs_free_wq,
 259 };
 260
 261 const struct uverbs_obj_idr_type uverbs_type_attrs_rwq_ind_table = {
 262         .type = UVERBS_TYPE_ALLOC_IDR(0),
 263         .destroy_object = uverbs_free_rwq_ind_tbl,
 264 };
 265
 266 const struct uverbs_obj_idr_type uverbs_type_attrs_xrcd = {
 267         .type = UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uxrcd_object), 0),
 268         .destroy_object = uverbs_free_xrcd,
 269 };
 270
 271 const struct uverbs_obj_idr_type uverbs_type_attrs_pd = {
 272         /* 2 is used in order to free the PD after MRs */
 273         .type = UVERBS_TYPE_ALLOC_IDR(2),
 274         .destroy_object = uverbs_free_pd,
 275 };