drivers/infiniband/core/uverbs_std_types_cq.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_core.h"
  35 #include "uverbs.h"
  36
  37 static int uverbs_free_cq(struct ib_uobject *uobject,
  38                           enum rdma_remove_reason why,
  39                           struct uverbs_attr_bundle *attrs)
  40 {
  41         struct ib_cq *cq = uobject->object;
  42         struct ib_uverbs_event_queue *ev_queue = cq->cq_context;
  43         struct ib_ucq_object *ucq =
  44                 container_of(uobject, struct ib_ucq_object, uevent.uobject);
  45         int ret;
  46
  47         ret = ib_destroy_cq_user(cq, &attrs->driver_udata);
  48         if (ib_is_destroy_retryable(ret, why, uobject))
  49                 return ret;
  50
  51         ib_uverbs_release_ucq(
  52                 ev_queue ? container_of(ev_queue,
  53                                         struct ib_uverbs_completion_event_file,
  54                                         ev_queue) :
  55                            NULL,
  56                 ucq);
  57         return ret;
  58 }
  59
  60 static int UVERBS_HANDLER(UVERBS_METHOD_CQ_CREATE)(
  61         struct uverbs_attr_bundle *attrs)
  62 {
  63         struct ib_ucq_object *obj = container_of(
  64                 uverbs_attr_get_uobject(attrs, UVERBS_ATTR_CREATE_CQ_HANDLE),
  65                 typeof(*obj), uevent.uobject);
  66         struct ib_device *ib_dev = attrs->context->device;
  67         int ret;
  68         u64 user_handle;
  69         struct ib_cq_init_attr attr = {};
  70         struct ib_cq                   *cq;
  71         struct ib_uverbs_completion_event_file    *ev_file = NULL;
  72         struct ib_uobject *ev_file_uobj;
  73
  74         if (!ib_dev->ops.create_cq || !ib_dev->ops.destroy_cq)
  75                 return -EOPNOTSUPP;
  76
  77         ret = uverbs_copy_from(&attr.comp_vector, attrs,
  78                                UVERBS_ATTR_CREATE_CQ_COMP_VECTOR);
  79         if (!ret)
  80                 ret = uverbs_copy_from(&attr.cqe, attrs,
  81                                        UVERBS_ATTR_CREATE_CQ_CQE);
  82         if (!ret)
  83                 ret = uverbs_copy_from(&user_handle, attrs,
  84                                        UVERBS_ATTR_CREATE_CQ_USER_HANDLE);
  85         if (ret)
  86                 return ret;
  87
  88         ret = uverbs_get_flags32(&attr.flags, attrs,
  89                                  UVERBS_ATTR_CREATE_CQ_FLAGS,
  90                                  IB_UVERBS_CQ_FLAGS_TIMESTAMP_COMPLETION |
  91                                          IB_UVERBS_CQ_FLAGS_IGNORE_OVERRUN);
  92         if (ret)
  93                 return ret;
  94
  95         ev_file_uobj = uverbs_attr_get_uobject(attrs, UVERBS_ATTR_CREATE_CQ_COMP_CHANNEL);
  96         if (!IS_ERR(ev_file_uobj)) {
  97                 ev_file = container_of(ev_file_uobj,
  98                                        struct ib_uverbs_completion_event_file,
  99                                        uobj);
 100                 uverbs_uobject_get(ev_file_uobj);
 101         }
 102
 103         if (attr.comp_vector >= attrs->ufile->device->num_comp_vectors) {
 104                 ret = -EINVAL;
 105                 goto err_event_file;
 106         }
 107
 108         INIT_LIST_HEAD(&obj->comp_list);
 109         INIT_LIST_HEAD(&obj->uevent.event_list);
 110
 111         cq = rdma_zalloc_drv_obj(ib_dev, ib_cq);
 112         if (!cq) {
 113                 ret = -ENOMEM;
 114                 goto err_event_file;
 115         }
 116
 117         cq->device        = ib_dev;
 118         cq->uobject       = obj;
 119         cq->comp_handler  = ib_uverbs_comp_handler;
 120         cq->event_handler = ib_uverbs_cq_event_handler;
 121         cq->cq_context    = ev_file ? &ev_file->ev_queue : NULL;
 122         atomic_set(&cq->usecnt, 0);
 123         cq->res.type = RDMA_RESTRACK_CQ;
 124
 125         ret = ib_dev->ops.create_cq(cq, &attr, &attrs->driver_udata);
 126         if (ret)
 127                 goto err_free;
 128
 129         obj->uevent.uobject.object = cq;
 130         obj->uevent.uobject.user_handle = user_handle;
 131         rdma_restrack_uadd(&cq->res);
 132
 133         ret = uverbs_copy_to(attrs, UVERBS_ATTR_CREATE_CQ_RESP_CQE, &cq->cqe,
 134                              sizeof(cq->cqe));
 135         if (ret)
 136                 goto err_cq;
 137
 138         return 0;
 139 err_cq:
 140         ib_destroy_cq_user(cq, uverbs_get_cleared_udata(attrs));
 141         cq = NULL;
 142 err_free:
 143         kfree(cq);
 144 err_event_file:
 145         if (ev_file)
 146                 uverbs_uobject_put(ev_file_uobj);
 147         return ret;
 148 };
 149
 150 DECLARE_UVERBS_NAMED_METHOD(
 151         UVERBS_METHOD_CQ_CREATE,
 152         UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_CQ_HANDLE,
 153                         UVERBS_OBJECT_CQ,
 154                         UVERBS_ACCESS_NEW,
 155                         UA_MANDATORY),
 156         UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_CQ_CQE,
 157                            UVERBS_ATTR_TYPE(u32),
 158                            UA_MANDATORY),
 159         UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_CQ_USER_HANDLE,
 160                            UVERBS_ATTR_TYPE(u64),
 161                            UA_MANDATORY),
 162         UVERBS_ATTR_FD(UVERBS_ATTR_CREATE_CQ_COMP_CHANNEL,
 163                        UVERBS_OBJECT_COMP_CHANNEL,
 164                        UVERBS_ACCESS_READ,
 165                        UA_OPTIONAL),
 166         UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_CQ_COMP_VECTOR,
 167                            UVERBS_ATTR_TYPE(u32),
 168                            UA_MANDATORY),
 169         UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_CREATE_CQ_FLAGS,
 170                              enum ib_uverbs_ex_create_cq_flags),
 171         UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_CREATE_CQ_RESP_CQE,
 172                             UVERBS_ATTR_TYPE(u32),
 173                             UA_MANDATORY),
 174         UVERBS_ATTR_UHW());
 175
 176 static int UVERBS_HANDLER(UVERBS_METHOD_CQ_DESTROY)(
 177         struct uverbs_attr_bundle *attrs)
 178 {
 179         struct ib_uobject *uobj =
 180                 uverbs_attr_get_uobject(attrs, UVERBS_ATTR_DESTROY_CQ_HANDLE);
 181         struct ib_ucq_object *obj =
 182                 container_of(uobj, struct ib_ucq_object, uevent.uobject);
 183         struct ib_uverbs_destroy_cq_resp resp = {
 184                 .comp_events_reported = obj->comp_events_reported,
 185                 .async_events_reported = obj->uevent.events_reported
 186         };
 187
 188         return uverbs_copy_to(attrs, UVERBS_ATTR_DESTROY_CQ_RESP, &resp,
 189                               sizeof(resp));
 190 }
 191
 192 DECLARE_UVERBS_NAMED_METHOD(
 193         UVERBS_METHOD_CQ_DESTROY,
 194         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_CQ_HANDLE,
 195                         UVERBS_OBJECT_CQ,
 196                         UVERBS_ACCESS_DESTROY,
 197                         UA_MANDATORY),
 198         UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_DESTROY_CQ_RESP,
 199                             UVERBS_ATTR_TYPE(struct ib_uverbs_destroy_cq_resp),
 200                             UA_MANDATORY));
 201
 202 DECLARE_UVERBS_NAMED_OBJECT(
 203         UVERBS_OBJECT_CQ,
 204         UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_ucq_object), uverbs_free_cq),
 205
 206 #if IS_ENABLED(CONFIG_INFINIBAND_EXP_LEGACY_VERBS_NEW_UAPI)
 207         &UVERBS_METHOD(UVERBS_METHOD_CQ_CREATE),
 208         &UVERBS_METHOD(UVERBS_METHOD_CQ_DESTROY)
 209 #endif
 210 );
 211
 212 const struct uapi_definition uverbs_def_obj_cq[] = {
 213         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_CQ,
 214                                       UAPI_DEF_OBJ_NEEDS_FN(destroy_cq)),
 215         {}
 216 };