xref: /openbmc/qemu/backends/cryptodev.c (revision 2562755e) 
1 /*
2  * QEMU Crypto Device Implementation
3  *
4  * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
5  *
6  * Authors:
7  *    Gonglei <arei.gonglei@huawei.com>
8  *
9  * This library is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2 of the License, or (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
21  *
22  */
23 
24 #include "qemu/osdep.h"
25 #include "sysemu/cryptodev.h"
26 #include "hw/boards.h"
27 #include "qapi/error.h"
28 #include "qapi/visitor.h"
29 #include "qapi-types.h"
30 #include "qapi-visit.h"
31 #include "qemu/config-file.h"
32 #include "qom/object_interfaces.h"
33 #include "hw/virtio/virtio-crypto.h"
34 
35 
36 static QTAILQ_HEAD(, CryptoDevBackendClient) crypto_clients;
37 
38 
39 CryptoDevBackendClient *
40 cryptodev_backend_new_client(const char *model,
41                                     const char *name)
42 {
43     CryptoDevBackendClient *cc;
44 
45     cc = g_malloc0(sizeof(CryptoDevBackendClient));
46     cc->model = g_strdup(model);
47     if (name) {
48         cc->name = g_strdup(name);
49     }
50 
51     QTAILQ_INSERT_TAIL(&crypto_clients, cc, next);
52 
53     return cc;
54 }
55 
56 void cryptodev_backend_free_client(
57                   CryptoDevBackendClient *cc)
58 {
59     QTAILQ_REMOVE(&crypto_clients, cc, next);
60     g_free(cc->name);
61     g_free(cc->model);
62     g_free(cc->info_str);
63     g_free(cc);
64 }
65 
66 void cryptodev_backend_cleanup(
67              CryptoDevBackend *backend,
68              Error **errp)
69 {
70     CryptoDevBackendClass *bc =
71                   CRYPTODEV_BACKEND_GET_CLASS(backend);
72 
73     if (bc->cleanup) {
74         bc->cleanup(backend, errp);
75     }
76 }
77 
78 int64_t cryptodev_backend_sym_create_session(
79            CryptoDevBackend *backend,
80            CryptoDevBackendSymSessionInfo *sess_info,
81            uint32_t queue_index, Error **errp)
82 {
83     CryptoDevBackendClass *bc =
84                       CRYPTODEV_BACKEND_GET_CLASS(backend);
85 
86     if (bc->create_session) {
87         return bc->create_session(backend, sess_info, queue_index, errp);
88     }
89 
90     return -1;
91 }
92 
93 int cryptodev_backend_sym_close_session(
94            CryptoDevBackend *backend,
95            uint64_t session_id,
96            uint32_t queue_index, Error **errp)
97 {
98     CryptoDevBackendClass *bc =
99                       CRYPTODEV_BACKEND_GET_CLASS(backend);
100 
101     if (bc->close_session) {
102         return bc->close_session(backend, session_id, queue_index, errp);
103     }
104 
105     return -1;
106 }
107 
108 static int cryptodev_backend_sym_operation(
109                  CryptoDevBackend *backend,
110                  CryptoDevBackendSymOpInfo *op_info,
111                  uint32_t queue_index, Error **errp)
112 {
113     CryptoDevBackendClass *bc =
114                       CRYPTODEV_BACKEND_GET_CLASS(backend);
115 
116     if (bc->do_sym_op) {
117         return bc->do_sym_op(backend, op_info, queue_index, errp);
118     }
119 
120     return -VIRTIO_CRYPTO_ERR;
121 }
122 
123 int cryptodev_backend_crypto_operation(
124                  CryptoDevBackend *backend,
125                  void *opaque,
126                  uint32_t queue_index, Error **errp)
127 {
128     VirtIOCryptoReq *req = opaque;
129 
130     if (req->flags == CRYPTODEV_BACKEND_ALG_SYM) {
131         CryptoDevBackendSymOpInfo *op_info;
132         op_info = req->u.sym_op_info;
133 
134         return cryptodev_backend_sym_operation(backend,
135                          op_info, queue_index, errp);
136     } else {
137         error_setg(errp, "Unsupported cryptodev alg type: %" PRIu32 "",
138                    req->flags);
139        return -VIRTIO_CRYPTO_NOTSUPP;
140     }
141 
142     return -VIRTIO_CRYPTO_ERR;
143 }
144 
145 static void
146 cryptodev_backend_get_queues(Object *obj, Visitor *v, const char *name,
147                              void *opaque, Error **errp)
148 {
149     CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
150     uint32_t value = backend->conf.peers.queues;
151 
152     visit_type_uint32(v, name, &value, errp);
153 }
154 
155 static void
156 cryptodev_backend_set_queues(Object *obj, Visitor *v, const char *name,
157                              void *opaque, Error **errp)
158 {
159     CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
160     Error *local_err = NULL;
161     uint32_t value;
162 
163     visit_type_uint32(v, name, &value, &local_err);
164     if (local_err) {
165         goto out;
166     }
167     if (!value) {
168         error_setg(&local_err, "Property '%s.%s' doesn't take value '%"
169                    PRIu32 "'", object_get_typename(obj), name, value);
170         goto out;
171     }
172     backend->conf.peers.queues = value;
173 out:
174     error_propagate(errp, local_err);
175 }
176 
177 static void
178 cryptodev_backend_complete(UserCreatable *uc, Error **errp)
179 {
180     CryptoDevBackend *backend = CRYPTODEV_BACKEND(uc);
181     CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_GET_CLASS(uc);
182     Error *local_err = NULL;
183 
184     if (bc->init) {
185         bc->init(backend, &local_err);
186         if (local_err) {
187             goto out;
188         }
189     }
190 
191     return;
192 
193 out:
194     error_propagate(errp, local_err);
195 }
196 
197 void cryptodev_backend_set_used(CryptoDevBackend *backend, bool used)
198 {
199     backend->is_used = used;
200 }
201 
202 bool cryptodev_backend_is_used(CryptoDevBackend *backend)
203 {
204     return backend->is_used;
205 }
206 
207 void cryptodev_backend_set_ready(CryptoDevBackend *backend, bool ready)
208 {
209     backend->ready = ready;
210 }
211 
212 bool cryptodev_backend_is_ready(CryptoDevBackend *backend)
213 {
214     return backend->ready;
215 }
216 
217 static bool
218 cryptodev_backend_can_be_deleted(UserCreatable *uc)
219 {
220     return !cryptodev_backend_is_used(CRYPTODEV_BACKEND(uc));
221 }
222 
223 static void cryptodev_backend_instance_init(Object *obj)
224 {
225     object_property_add(obj, "queues", "uint32",
226                           cryptodev_backend_get_queues,
227                           cryptodev_backend_set_queues,
228                           NULL, NULL, NULL);
229     /* Initialize devices' queues property to 1 */
230     object_property_set_int(obj, 1, "queues", NULL);
231 }
232 
233 static void cryptodev_backend_finalize(Object *obj)
234 {
235     CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
236 
237     cryptodev_backend_cleanup(backend, NULL);
238 }
239 
240 static void
241 cryptodev_backend_class_init(ObjectClass *oc, void *data)
242 {
243     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
244 
245     ucc->complete = cryptodev_backend_complete;
246     ucc->can_be_deleted = cryptodev_backend_can_be_deleted;
247 
248     QTAILQ_INIT(&crypto_clients);
249 }
250 
251 static const TypeInfo cryptodev_backend_info = {
252     .name = TYPE_CRYPTODEV_BACKEND,
253     .parent = TYPE_OBJECT,
254     .instance_size = sizeof(CryptoDevBackend),
255     .instance_init = cryptodev_backend_instance_init,
256     .instance_finalize = cryptodev_backend_finalize,
257     .class_size = sizeof(CryptoDevBackendClass),
258     .class_init = cryptodev_backend_class_init,
259     .interfaces = (InterfaceInfo[]) {
260         { TYPE_USER_CREATABLE },
261         { }
262     }
263 };
264 
265 static void
266 cryptodev_backend_register_types(void)
267 {
268     type_register_static(&cryptodev_backend_info);
269 }
270 
271 type_init(cryptodev_backend_register_types);
272