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 (!ret || why != RDMA_REMOVE_DESTROY) 48 ib_uverbs_release_ucq(uobject->context->ufile, ev_queue ? 49 container_of(ev_queue, 50 struct ib_uverbs_completion_event_file, 51 ev_queue) : NULL, 52 ucq); 53 return ret; 54 } 55 56 static int UVERBS_HANDLER(UVERBS_METHOD_CQ_CREATE)(struct ib_device *ib_dev, 57 struct ib_uverbs_file *file, 58 struct uverbs_attr_bundle *attrs) 59 { 60 struct ib_ucontext *ucontext = file->ucontext; 61 struct ib_ucq_object *obj; 62 struct ib_udata uhw; 63 int ret; 64 u64 user_handle; 65 struct ib_cq_init_attr attr = {}; 66 struct ib_cq *cq; 67 struct ib_uverbs_completion_event_file *ev_file = NULL; 68 struct ib_uobject *ev_file_uobj; 69 70 if (!(ib_dev->uverbs_cmd_mask & 1ULL << IB_USER_VERBS_CMD_CREATE_CQ)) 71 return -EOPNOTSUPP; 72 73 ret = uverbs_copy_from(&attr.comp_vector, attrs, 74 UVERBS_ATTR_CREATE_CQ_COMP_VECTOR); 75 if (!ret) 76 ret = uverbs_copy_from(&attr.cqe, attrs, 77 UVERBS_ATTR_CREATE_CQ_CQE); 78 if (!ret) 79 ret = uverbs_copy_from(&user_handle, attrs, 80 UVERBS_ATTR_CREATE_CQ_USER_HANDLE); 81 if (ret) 82 return ret; 83 84 /* Optional param, if it doesn't exist, we get -ENOENT and skip it */ 85 if (IS_UVERBS_COPY_ERR(uverbs_copy_from(&attr.flags, attrs, 86 UVERBS_ATTR_CREATE_CQ_FLAGS))) 87 return -EFAULT; 88 89 ev_file_uobj = uverbs_attr_get_uobject(attrs, UVERBS_ATTR_CREATE_CQ_COMP_CHANNEL); 90 if (!IS_ERR(ev_file_uobj)) { 91 ev_file = container_of(ev_file_uobj, 92 struct ib_uverbs_completion_event_file, 93 uobj_file.uobj); 94 uverbs_uobject_get(ev_file_uobj); 95 } 96 97 if (attr.comp_vector >= ucontext->ufile->device->num_comp_vectors) { 98 ret = -EINVAL; 99 goto err_event_file; 100 } 101 102 obj = container_of(uverbs_attr_get_uobject(attrs, 103 UVERBS_ATTR_CREATE_CQ_HANDLE), 104 typeof(*obj), uobject); 105 obj->uverbs_file = ucontext->ufile; 106 obj->comp_events_reported = 0; 107 obj->async_events_reported = 0; 108 INIT_LIST_HEAD(&obj->comp_list); 109 INIT_LIST_HEAD(&obj->async_list); 110 111 /* Temporary, only until drivers get the new uverbs_attr_bundle */ 112 create_udata(attrs, &uhw); 113 114 cq = ib_dev->create_cq(ib_dev, &attr, ucontext, &uhw); 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_add(&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 static DECLARE_UVERBS_NAMED_METHOD(UVERBS_METHOD_CQ_CREATE, 147 &UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_CQ_HANDLE, UVERBS_OBJECT_CQ, 148 UVERBS_ACCESS_NEW, 149 UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), 150 &UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_CQ_CQE, 151 UVERBS_ATTR_TYPE(u32), 152 UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), 153 &UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_CQ_USER_HANDLE, 154 UVERBS_ATTR_TYPE(u64), 155 UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), 156 &UVERBS_ATTR_FD(UVERBS_ATTR_CREATE_CQ_COMP_CHANNEL, 157 UVERBS_OBJECT_COMP_CHANNEL, 158 UVERBS_ACCESS_READ), 159 &UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_CQ_COMP_VECTOR, UVERBS_ATTR_TYPE(u32), 160 UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), 161 &UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_CQ_FLAGS, UVERBS_ATTR_TYPE(u32)), 162 &UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_CREATE_CQ_RESP_CQE, UVERBS_ATTR_TYPE(u32), 163 UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), 164 &uverbs_uhw_compat_in, &uverbs_uhw_compat_out); 165 166 static int UVERBS_HANDLER(UVERBS_METHOD_CQ_DESTROY)(struct ib_device *ib_dev, 167 struct ib_uverbs_file *file, 168 struct uverbs_attr_bundle *attrs) 169 { 170 struct ib_uobject *uobj = 171 uverbs_attr_get_uobject(attrs, UVERBS_ATTR_DESTROY_CQ_HANDLE); 172 struct ib_uverbs_destroy_cq_resp resp; 173 struct ib_ucq_object *obj; 174 int ret; 175 176 if (IS_ERR(uobj)) 177 return PTR_ERR(uobj); 178 179 obj = container_of(uobj, struct ib_ucq_object, uobject); 180 181 if (!(ib_dev->uverbs_cmd_mask & 1ULL << IB_USER_VERBS_CMD_DESTROY_CQ)) 182 return -EOPNOTSUPP; 183 184 ret = rdma_explicit_destroy(uobj); 185 if (ret) 186 return ret; 187 188 resp.comp_events_reported = obj->comp_events_reported; 189 resp.async_events_reported = obj->async_events_reported; 190 191 return uverbs_copy_to(attrs, UVERBS_ATTR_DESTROY_CQ_RESP, &resp, 192 sizeof(resp)); 193 } 194 195 static DECLARE_UVERBS_NAMED_METHOD(UVERBS_METHOD_CQ_DESTROY, 196 &UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_CQ_HANDLE, UVERBS_OBJECT_CQ, 197 UVERBS_ACCESS_DESTROY, 198 UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), 199 &UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_DESTROY_CQ_RESP, 200 UVERBS_ATTR_TYPE(struct ib_uverbs_destroy_cq_resp), 201 UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY))); 202 203 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_CQ, 204 &UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_ucq_object), 0, 205 uverbs_free_cq), 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