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 #include "restrack.h" 37 38 static int uverbs_free_cq(struct ib_uobject *uobject, 39 enum rdma_remove_reason why, 40 struct uverbs_attr_bundle *attrs) 41 { 42 struct ib_cq *cq = uobject->object; 43 struct ib_uverbs_event_queue *ev_queue = cq->cq_context; 44 struct ib_ucq_object *ucq = 45 container_of(uobject, struct ib_ucq_object, uevent.uobject); 46 int ret; 47 48 ret = ib_destroy_cq_user(cq, &attrs->driver_udata); 49 if (ret) 50 return ret; 51 52 ib_uverbs_release_ucq( 53 ev_queue ? container_of(ev_queue, 54 struct ib_uverbs_completion_event_file, 55 ev_queue) : 56 NULL, 57 ucq); 58 return 0; 59 } 60 61 static int UVERBS_HANDLER(UVERBS_METHOD_CQ_CREATE)( 62 struct uverbs_attr_bundle *attrs) 63 { 64 struct ib_ucq_object *obj = container_of( 65 uverbs_attr_get_uobject(attrs, UVERBS_ATTR_CREATE_CQ_HANDLE), 66 typeof(*obj), uevent.uobject); 67 struct ib_device *ib_dev = attrs->context->device; 68 int ret; 69 u64 user_handle; 70 struct ib_cq_init_attr attr = {}; 71 struct ib_cq *cq; 72 struct ib_uverbs_completion_event_file *ev_file = NULL; 73 struct ib_uobject *ev_file_uobj; 74 75 if (!ib_dev->ops.create_cq || !ib_dev->ops.destroy_cq) 76 return -EOPNOTSUPP; 77 78 ret = uverbs_copy_from(&attr.comp_vector, attrs, 79 UVERBS_ATTR_CREATE_CQ_COMP_VECTOR); 80 if (!ret) 81 ret = uverbs_copy_from(&attr.cqe, attrs, 82 UVERBS_ATTR_CREATE_CQ_CQE); 83 if (!ret) 84 ret = uverbs_copy_from(&user_handle, attrs, 85 UVERBS_ATTR_CREATE_CQ_USER_HANDLE); 86 if (ret) 87 return ret; 88 89 ret = uverbs_get_flags32(&attr.flags, attrs, 90 UVERBS_ATTR_CREATE_CQ_FLAGS, 91 IB_UVERBS_CQ_FLAGS_TIMESTAMP_COMPLETION | 92 IB_UVERBS_CQ_FLAGS_IGNORE_OVERRUN); 93 if (ret) 94 return ret; 95 96 ev_file_uobj = uverbs_attr_get_uobject(attrs, UVERBS_ATTR_CREATE_CQ_COMP_CHANNEL); 97 if (!IS_ERR(ev_file_uobj)) { 98 ev_file = container_of(ev_file_uobj, 99 struct ib_uverbs_completion_event_file, 100 uobj); 101 uverbs_uobject_get(ev_file_uobj); 102 } 103 104 obj->uevent.event_file = ib_uverbs_get_async_event( 105 attrs, UVERBS_ATTR_CREATE_CQ_EVENT_FD); 106 107 if (attr.comp_vector >= attrs->ufile->device->num_comp_vectors) { 108 ret = -EINVAL; 109 goto err_event_file; 110 } 111 112 INIT_LIST_HEAD(&obj->comp_list); 113 INIT_LIST_HEAD(&obj->uevent.event_list); 114 115 cq = rdma_zalloc_drv_obj(ib_dev, ib_cq); 116 if (!cq) { 117 ret = -ENOMEM; 118 goto err_event_file; 119 } 120 121 cq->device = ib_dev; 122 cq->uobject = obj; 123 cq->comp_handler = ib_uverbs_comp_handler; 124 cq->event_handler = ib_uverbs_cq_event_handler; 125 cq->cq_context = ev_file ? &ev_file->ev_queue : NULL; 126 atomic_set(&cq->usecnt, 0); 127 128 rdma_restrack_new(&cq->res, RDMA_RESTRACK_CQ); 129 rdma_restrack_set_name(&cq->res, NULL); 130 131 ret = ib_dev->ops.create_cq(cq, &attr, &attrs->driver_udata); 132 if (ret) 133 goto err_free; 134 135 obj->uevent.uobject.object = cq; 136 obj->uevent.uobject.user_handle = user_handle; 137 rdma_restrack_add(&cq->res); 138 uverbs_finalize_uobj_create(attrs, UVERBS_ATTR_CREATE_CQ_HANDLE); 139 140 ret = uverbs_copy_to(attrs, UVERBS_ATTR_CREATE_CQ_RESP_CQE, &cq->cqe, 141 sizeof(cq->cqe)); 142 return ret; 143 144 err_free: 145 rdma_restrack_put(&cq->res); 146 kfree(cq); 147 err_event_file: 148 if (obj->uevent.event_file) 149 uverbs_uobject_put(&obj->uevent.event_file->uobj); 150 if (ev_file) 151 uverbs_uobject_put(ev_file_uobj); 152 return ret; 153 }; 154 155 DECLARE_UVERBS_NAMED_METHOD( 156 UVERBS_METHOD_CQ_CREATE, 157 UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_CQ_HANDLE, 158 UVERBS_OBJECT_CQ, 159 UVERBS_ACCESS_NEW, 160 UA_MANDATORY), 161 UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_CQ_CQE, 162 UVERBS_ATTR_TYPE(u32), 163 UA_MANDATORY), 164 UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_CQ_USER_HANDLE, 165 UVERBS_ATTR_TYPE(u64), 166 UA_MANDATORY), 167 UVERBS_ATTR_FD(UVERBS_ATTR_CREATE_CQ_COMP_CHANNEL, 168 UVERBS_OBJECT_COMP_CHANNEL, 169 UVERBS_ACCESS_READ, 170 UA_OPTIONAL), 171 UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_CQ_COMP_VECTOR, 172 UVERBS_ATTR_TYPE(u32), 173 UA_MANDATORY), 174 UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_CREATE_CQ_FLAGS, 175 enum ib_uverbs_ex_create_cq_flags), 176 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_CREATE_CQ_RESP_CQE, 177 UVERBS_ATTR_TYPE(u32), 178 UA_MANDATORY), 179 UVERBS_ATTR_FD(UVERBS_ATTR_CREATE_CQ_EVENT_FD, 180 UVERBS_OBJECT_ASYNC_EVENT, 181 UVERBS_ACCESS_READ, 182 UA_OPTIONAL), 183 UVERBS_ATTR_UHW()); 184 185 static int UVERBS_HANDLER(UVERBS_METHOD_CQ_DESTROY)( 186 struct uverbs_attr_bundle *attrs) 187 { 188 struct ib_uobject *uobj = 189 uverbs_attr_get_uobject(attrs, UVERBS_ATTR_DESTROY_CQ_HANDLE); 190 struct ib_ucq_object *obj = 191 container_of(uobj, struct ib_ucq_object, uevent.uobject); 192 struct ib_uverbs_destroy_cq_resp resp = { 193 .comp_events_reported = obj->comp_events_reported, 194 .async_events_reported = obj->uevent.events_reported 195 }; 196 197 return uverbs_copy_to(attrs, UVERBS_ATTR_DESTROY_CQ_RESP, &resp, 198 sizeof(resp)); 199 } 200 201 DECLARE_UVERBS_NAMED_METHOD( 202 UVERBS_METHOD_CQ_DESTROY, 203 UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_CQ_HANDLE, 204 UVERBS_OBJECT_CQ, 205 UVERBS_ACCESS_DESTROY, 206 UA_MANDATORY), 207 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_DESTROY_CQ_RESP, 208 UVERBS_ATTR_TYPE(struct ib_uverbs_destroy_cq_resp), 209 UA_MANDATORY)); 210 211 DECLARE_UVERBS_NAMED_OBJECT( 212 UVERBS_OBJECT_CQ, 213 UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_ucq_object), uverbs_free_cq), 214 &UVERBS_METHOD(UVERBS_METHOD_CQ_CREATE), 215 &UVERBS_METHOD(UVERBS_METHOD_CQ_DESTROY) 216 ); 217 218 const struct uapi_definition uverbs_def_obj_cq[] = { 219 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_CQ, 220 UAPI_DEF_OBJ_NEEDS_FN(destroy_cq)), 221 {} 222 }; 223