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
uverbs_free_cq(struct ib_uobject * uobject,enum rdma_remove_reason why,struct uverbs_attr_bundle * attrs)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
UVERBS_HANDLER(UVERBS_METHOD_CQ_CREATE)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->create_cq || !ib_dev->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
124 ret = ib_dev->create_cq(cq, &attr, &attrs->driver_udata);
125 if (ret)
126 goto err_free;
127
128 obj->uevent.uobject.object = cq;
129 obj->uevent.uobject.user_handle = user_handle;
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_user(cq, uverbs_get_cleared_udata(attrs));
139 cq = NULL;
140 err_free:
141 kfree(cq);
142 err_event_file:
143 if (ev_file)
144 uverbs_uobject_put(ev_file_uobj);
145 return ret;
146 };
147
148 DECLARE_UVERBS_NAMED_METHOD(
149 UVERBS_METHOD_CQ_CREATE,
150 UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_CQ_HANDLE,
151 UVERBS_OBJECT_CQ,
152 UVERBS_ACCESS_NEW,
153 UA_MANDATORY),
154 UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_CQ_CQE,
155 UVERBS_ATTR_TYPE(u32),
156 UA_MANDATORY),
157 UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_CQ_USER_HANDLE,
158 UVERBS_ATTR_TYPE(u64),
159 UA_MANDATORY),
160 UVERBS_ATTR_FD(UVERBS_ATTR_CREATE_CQ_COMP_CHANNEL,
161 UVERBS_OBJECT_COMP_CHANNEL,
162 UVERBS_ACCESS_READ,
163 UA_OPTIONAL),
164 UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CREATE_CQ_COMP_VECTOR,
165 UVERBS_ATTR_TYPE(u32),
166 UA_MANDATORY),
167 UVERBS_ATTR_FLAGS_IN(UVERBS_ATTR_CREATE_CQ_FLAGS,
168 enum ib_uverbs_ex_create_cq_flags),
169 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_CREATE_CQ_RESP_CQE,
170 UVERBS_ATTR_TYPE(u32),
171 UA_MANDATORY),
172 UVERBS_ATTR_UHW());
173
UVERBS_HANDLER(UVERBS_METHOD_CQ_DESTROY)174 static int UVERBS_HANDLER(UVERBS_METHOD_CQ_DESTROY)(
175 struct uverbs_attr_bundle *attrs)
176 {
177 struct ib_uobject *uobj =
178 uverbs_attr_get_uobject(attrs, UVERBS_ATTR_DESTROY_CQ_HANDLE);
179 struct ib_ucq_object *obj =
180 container_of(uobj, struct ib_ucq_object, uevent.uobject);
181 struct ib_uverbs_destroy_cq_resp resp = {
182 .comp_events_reported = obj->comp_events_reported,
183 .async_events_reported = obj->uevent.events_reported
184 };
185
186 return uverbs_copy_to(attrs, UVERBS_ATTR_DESTROY_CQ_RESP, &resp,
187 sizeof(resp));
188 }
189
190 DECLARE_UVERBS_NAMED_METHOD(
191 UVERBS_METHOD_CQ_DESTROY,
192 UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_CQ_HANDLE,
193 UVERBS_OBJECT_CQ,
194 UVERBS_ACCESS_DESTROY,
195 UA_MANDATORY),
196 UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_DESTROY_CQ_RESP,
197 UVERBS_ATTR_TYPE(struct ib_uverbs_destroy_cq_resp),
198 UA_MANDATORY));
199
200 DECLARE_UVERBS_NAMED_OBJECT(
201 UVERBS_OBJECT_CQ,
202 UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_ucq_object), uverbs_free_cq),
203
204 #if 1 /* CONFIG_INFINIBAND_EXP_LEGACY_VERBS_NEW_UAPI */
205 &UVERBS_METHOD(UVERBS_METHOD_CQ_CREATE),
206 &UVERBS_METHOD(UVERBS_METHOD_CQ_DESTROY)
207 #endif
208 );
209
210 const struct uapi_definition uverbs_def_obj_cq[] = {
211 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_CQ,
212 UAPI_DEF_OBJ_NEEDS_FN(destroy_cq)),
213 {}
214 };
215