xref: /qemu/backends/cryptodev.c (revision 8d6d4c1b) 
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 "qapi/error.h"
27 #include "qapi/visitor.h"
28 #include "qemu/config-file.h"
29 #include "qom/object_interfaces.h"
30 #include "hw/virtio/virtio-crypto.h"
31 
32 
33 static QTAILQ_HEAD(, CryptoDevBackendClient) crypto_clients;
34 
35 
36 CryptoDevBackendClient *
37 cryptodev_backend_new_client(const char *model,
38                                     const char *name)
39 {
40     CryptoDevBackendClient *cc;
41 
42     cc = g_malloc0(sizeof(CryptoDevBackendClient));
43     cc->model = g_strdup(model);
44     if (name) {
45         cc->name = g_strdup(name);
46     }
47 
48     QTAILQ_INSERT_TAIL(&crypto_clients, cc, next);
49 
50     return cc;
51 }
52 
53 void cryptodev_backend_free_client(
54                   CryptoDevBackendClient *cc)
55 {
56     QTAILQ_REMOVE(&crypto_clients, cc, next);
57     g_free(cc->name);
58     g_free(cc->model);
59     g_free(cc->info_str);
60     g_free(cc);
61 }
62 
63 void cryptodev_backend_cleanup(
64              CryptoDevBackend *backend,
65              Error **errp)
66 {
67     CryptoDevBackendClass *bc =
68                   CRYPTODEV_BACKEND_GET_CLASS(backend);
69 
70     if (bc->cleanup) {
71         bc->cleanup(backend, errp);
72     }
73 }
74 
75 int64_t cryptodev_backend_sym_create_session(
76            CryptoDevBackend *backend,
77            CryptoDevBackendSymSessionInfo *sess_info,
78            uint32_t queue_index, Error **errp)
79 {
80     CryptoDevBackendClass *bc =
81                       CRYPTODEV_BACKEND_GET_CLASS(backend);
82 
83     if (bc->create_session) {
84         return bc->create_session(backend, sess_info, queue_index, errp);
85     }
86 
87     return -1;
88 }
89 
90 int cryptodev_backend_sym_close_session(
91            CryptoDevBackend *backend,
92            uint64_t session_id,
93            uint32_t queue_index, Error **errp)
94 {
95     CryptoDevBackendClass *bc =
96                       CRYPTODEV_BACKEND_GET_CLASS(backend);
97 
98     if (bc->close_session) {
99         return bc->close_session(backend, session_id, queue_index, errp);
100     }
101 
102     return -1;
103 }
104 
105 static int cryptodev_backend_sym_operation(
106                  CryptoDevBackend *backend,
107                  CryptoDevBackendSymOpInfo *op_info,
108                  uint32_t queue_index, Error **errp)
109 {
110     CryptoDevBackendClass *bc =
111                       CRYPTODEV_BACKEND_GET_CLASS(backend);
112 
113     if (bc->do_sym_op) {
114         return bc->do_sym_op(backend, op_info, queue_index, errp);
115     }
116 
117     return -VIRTIO_CRYPTO_ERR;
118 }
119 
120 int cryptodev_backend_crypto_operation(
121                  CryptoDevBackend *backend,
122                  void *opaque,
123                  uint32_t queue_index, Error **errp)
124 {
125     VirtIOCryptoReq *req = opaque;
126 
127     if (req->flags == CRYPTODEV_BACKEND_ALG_SYM) {
128         CryptoDevBackendSymOpInfo *op_info;
129         op_info = req->u.sym_op_info;
130 
131         return cryptodev_backend_sym_operation(backend,
132                          op_info, queue_index, errp);
133     } else {
134         error_setg(errp, "Unsupported cryptodev alg type: %" PRIu32 "",
135                    req->flags);
136        return -VIRTIO_CRYPTO_NOTSUPP;
137     }
138 
139     return -VIRTIO_CRYPTO_ERR;
140 }
141 
142 static void
143 cryptodev_backend_get_queues(Object *obj, Visitor *v, const char *name,
144                              void *opaque, Error **errp)
145 {
146     CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
147     uint32_t value = backend->conf.peers.queues;
148 
149     visit_type_uint32(v, name, &value, errp);
150 }
151 
152 static void
153 cryptodev_backend_set_queues(Object *obj, Visitor *v, const char *name,
154                              void *opaque, Error **errp)
155 {
156     CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
157     Error *local_err = NULL;
158     uint32_t value;
159 
160     visit_type_uint32(v, name, &value, &local_err);
161     if (local_err) {
162         goto out;
163     }
164     if (!value) {
165         error_setg(&local_err, "Property '%s.%s' doesn't take value '%"
166                    PRIu32 "'", object_get_typename(obj), name, value);
167         goto out;
168     }
169     backend->conf.peers.queues = value;
170 out:
171     error_propagate(errp, local_err);
172 }
173 
174 static void
175 cryptodev_backend_complete(UserCreatable *uc, Error **errp)
176 {
177     CryptoDevBackend *backend = CRYPTODEV_BACKEND(uc);
178     CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_GET_CLASS(uc);
179 
180     if (bc->init) {
181         bc->init(backend, errp);
182     }
183 }
184 
185 void cryptodev_backend_set_used(CryptoDevBackend *backend, bool used)
186 {
187     backend->is_used = used;
188 }
189 
190 bool cryptodev_backend_is_used(CryptoDevBackend *backend)
191 {
192     return backend->is_used;
193 }
194 
195 void cryptodev_backend_set_ready(CryptoDevBackend *backend, bool ready)
196 {
197     backend->ready = ready;
198 }
199 
200 bool cryptodev_backend_is_ready(CryptoDevBackend *backend)
201 {
202     return backend->ready;
203 }
204 
205 static bool
206 cryptodev_backend_can_be_deleted(UserCreatable *uc)
207 {
208     return !cryptodev_backend_is_used(CRYPTODEV_BACKEND(uc));
209 }
210 
211 static void cryptodev_backend_instance_init(Object *obj)
212 {
213     object_property_add(obj, "queues", "uint32",
214                           cryptodev_backend_get_queues,
215                           cryptodev_backend_set_queues,
216                           NULL, NULL, NULL);
217     /* Initialize devices' queues property to 1 */
218     object_property_set_int(obj, 1, "queues", NULL);
219 }
220 
221 static void cryptodev_backend_finalize(Object *obj)
222 {
223     CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
224 
225     cryptodev_backend_cleanup(backend, NULL);
226 }
227 
228 static void
229 cryptodev_backend_class_init(ObjectClass *oc, void *data)
230 {
231     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
232 
233     ucc->complete = cryptodev_backend_complete;
234     ucc->can_be_deleted = cryptodev_backend_can_be_deleted;
235 
236     QTAILQ_INIT(&crypto_clients);
237 }
238 
239 static const TypeInfo cryptodev_backend_info = {
240     .name = TYPE_CRYPTODEV_BACKEND,
241     .parent = TYPE_OBJECT,
242     .instance_size = sizeof(CryptoDevBackend),
243     .instance_init = cryptodev_backend_instance_init,
244     .instance_finalize = cryptodev_backend_finalize,
245     .class_size = sizeof(CryptoDevBackendClass),
246     .class_init = cryptodev_backend_class_init,
247     .interfaces = (InterfaceInfo[]) {
248         { TYPE_USER_CREATABLE },
249         { }
250     }
251 };
252 
253 static void
254 cryptodev_backend_register_types(void)
255 {
256     type_register_static(&cryptodev_backend_info);
257 }
258 
259 type_init(cryptodev_backend_register_types);
260