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 { 40 struct ib_cq *cq = uobject->object; 41 struct ib_uverbs_event_queue *ev_queue = cq->cq_context; 42 struct ib_ucq_object *ucq = 43 container_of(uobject, struct ib_ucq_object, uobject); 44 int ret; 45 46 ret = ib_destroy_cq(cq); 47 if (ib_is_destroy_retryable(ret, why, uobject)) 48 return ret; 49 50 ib_uverbs_release_ucq( 51 uobject->context->ufile, 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), uobject); 66 struct ib_device *ib_dev = obj->uobject.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 obj->comp_events_reported = 0; 109 obj->async_events_reported = 0; 110 INIT_LIST_HEAD(&obj->comp_list); 111 INIT_LIST_HEAD(&obj->async_list); 112 113 cq = ib_dev->ops.create_cq(ib_dev, &attr, obj->uobject.context, 114 &attrs->driver_udata); 115 if (IS_ERR(cq)) { 116 ret = PTR_ERR(cq); 117 goto err_event_file; 118 } 119 120 cq->device = ib_dev; 121 cq->uobject = &obj->uobject; 122 cq->comp_handler = ib_uverbs_comp_handler; 123 cq->event_handler = ib_uverbs_cq_event_handler; 124 cq->cq_context = ev_file ? &ev_file->ev_queue : NULL; 125 obj->uobject.object = cq; 126 obj->uobject.user_handle = user_handle; 127 atomic_set(&cq->usecnt, 0); 128 cq->res.type = RDMA_RESTRACK_CQ; 129 rdma_restrack_uadd(&cq->res); 130 131 ret = uverbs_copy_to(attrs, UVERBS_ATTR_CREATE_CQ_RESP_CQE, &cq->cqe, 132 sizeof(cq->cqe)); 133 if (ret) 134 goto err_cq; 135 136 return 0; 137 err_cq: 138 ib_destroy_cq(cq); 139 140 err_event_file: 141 if (ev_file) 142 uverbs_uobject_put(ev_file_uobj); 143 return ret; 144 }; 145 146 DECLARE_UVERBS_NAMED_METHOD( 147 UVERBS_METHOD_CQ_CREATE, 148 UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_CQ_HANDLE, 149 UVERBS_OBJECT_CQ, 150 UVERBS_ACCESS_NEW, 151 UA_MANDATORY), 152 UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_CQ_CQE, 153 UVERBS_ATTR_TYPE(u32), 154 UA_MANDATORY), 155 UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_CQ_USER_HANDLE, 156 UVERBS_ATTR_TYPE(u64), 157 UA_MANDATORY), 158 UVERBS_ATTR_FD(UVERBS_ATTR_CREATE_CQ_COMP_CHANNEL, 159 UVERBS_OBJECT_COMP_CHANNEL, 160 UVERBS_ACCESS_READ, 161 UA_OPTIONAL), 162 UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_CQ_COMP_VECTOR, 163 UVERBS_ATTR_TYPE(u32), 164 UA_MANDATORY), 165 UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_CREATE_CQ_FLAGS, 166 enum ib_uverbs_ex_create_cq_flags), 167 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_CREATE_CQ_RESP_CQE, 168 UVERBS_ATTR_TYPE(u32), 169 UA_MANDATORY), 170 UVERBS_ATTR_UHW()); 171 172 static int UVERBS_HANDLER(UVERBS_METHOD_CQ_DESTROY)( 173 struct uverbs_attr_bundle *attrs) 174 { 175 struct ib_uobject *uobj = 176 uverbs_attr_get_uobject(attrs, UVERBS_ATTR_DESTROY_CQ_HANDLE); 177 struct ib_ucq_object *obj = 178 container_of(uobj, struct ib_ucq_object, uobject); 179 struct ib_uverbs_destroy_cq_resp resp = { 180 .comp_events_reported = obj->comp_events_reported, 181 .async_events_reported = obj->async_events_reported 182 }; 183 184 return uverbs_copy_to(attrs, UVERBS_ATTR_DESTROY_CQ_RESP, &resp, 185 sizeof(resp)); 186 } 187 188 DECLARE_UVERBS_NAMED_METHOD( 189 UVERBS_METHOD_CQ_DESTROY, 190 UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_CQ_HANDLE, 191 UVERBS_OBJECT_CQ, 192 UVERBS_ACCESS_DESTROY, 193 UA_MANDATORY), 194 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_DESTROY_CQ_RESP, 195 UVERBS_ATTR_TYPE(struct ib_uverbs_destroy_cq_resp), 196 UA_MANDATORY)); 197 198 DECLARE_UVERBS_NAMED_OBJECT( 199 UVERBS_OBJECT_CQ, 200 UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_ucq_object), uverbs_free_cq), 201 202 #if IS_ENABLED(CONFIG_INFINIBAND_EXP_LEGACY_VERBS_NEW_UAPI) 203 &UVERBS_METHOD(UVERBS_METHOD_CQ_CREATE), 204 &UVERBS_METHOD(UVERBS_METHOD_CQ_DESTROY) 205 #endif 206 ); 207 208 const struct uapi_definition uverbs_def_obj_cq[] = { 209 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_CQ, 210 UAPI_DEF_OBJ_NEEDS_FN(destroy_cq)), 211 {} 212 }; 213