xref: /openbmc/qemu/backends/cryptodev.c (revision fbf32752) 
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 "qemu/config-file.h"
30 #include "qom/object_interfaces.h"
31 #include "hw/virtio/virtio-crypto.h"
32 
33 
34 static QTAILQ_HEAD(, CryptoDevBackendClient) crypto_clients;
35 
36 
37 CryptoDevBackendClient *
38 cryptodev_backend_new_client(const char *model,
39                                     const char *name)
40 {
41     CryptoDevBackendClient *cc;
42 
43     cc = g_malloc0(sizeof(CryptoDevBackendClient));
44     cc->model = g_strdup(model);
45     if (name) {
46         cc->name = g_strdup(name);
47     }
48 
49     QTAILQ_INSERT_TAIL(&crypto_clients, cc, next);
50 
51     return cc;
52 }
53 
54 void cryptodev_backend_free_client(
55                   CryptoDevBackendClient *cc)
56 {
57     QTAILQ_REMOVE(&crypto_clients, cc, next);
58     g_free(cc->name);
59     g_free(cc->model);
60     g_free(cc->info_str);
61     g_free(cc);
62 }
63 
64 void cryptodev_backend_cleanup(
65              CryptoDevBackend *backend,
66              Error **errp)
67 {
68     CryptoDevBackendClass *bc =
69                   CRYPTODEV_BACKEND_GET_CLASS(backend);
70 
71     if (bc->cleanup) {
72         bc->cleanup(backend, errp);
73     }
74 }
75 
76 int64_t cryptodev_backend_sym_create_session(
77            CryptoDevBackend *backend,
78            CryptoDevBackendSymSessionInfo *sess_info,
79            uint32_t queue_index, Error **errp)
80 {
81     CryptoDevBackendClass *bc =
82                       CRYPTODEV_BACKEND_GET_CLASS(backend);
83 
84     if (bc->create_session) {
85         return bc->create_session(backend, sess_info, queue_index, errp);
86     }
87 
88     return -1;
89 }
90 
91 int cryptodev_backend_sym_close_session(
92            CryptoDevBackend *backend,
93            uint64_t session_id,
94            uint32_t queue_index, Error **errp)
95 {
96     CryptoDevBackendClass *bc =
97                       CRYPTODEV_BACKEND_GET_CLASS(backend);
98 
99     if (bc->close_session) {
100         return bc->close_session(backend, session_id, queue_index, errp);
101     }
102 
103     return -1;
104 }
105 
106 static int cryptodev_backend_sym_operation(
107                  CryptoDevBackend *backend,
108                  CryptoDevBackendSymOpInfo *op_info,
109                  uint32_t queue_index, Error **errp)
110 {
111     CryptoDevBackendClass *bc =
112                       CRYPTODEV_BACKEND_GET_CLASS(backend);
113 
114     if (bc->do_sym_op) {
115         return bc->do_sym_op(backend, op_info, queue_index, errp);
116     }
117 
118     return -VIRTIO_CRYPTO_ERR;
119 }
120 
121 int cryptodev_backend_crypto_operation(
122                  CryptoDevBackend *backend,
123                  void *opaque,
124                  uint32_t queue_index, Error **errp)
125 {
126     VirtIOCryptoReq *req = opaque;
127 
128     if (req->flags == CRYPTODEV_BACKEND_ALG_SYM) {
129         CryptoDevBackendSymOpInfo *op_info;
130         op_info = req->u.sym_op_info;
131 
132         return cryptodev_backend_sym_operation(backend,
133                          op_info, queue_index, errp);
134     } else {
135         error_setg(errp, "Unsupported cryptodev alg type: %" PRIu32 "",
136                    req->flags);
137        return -VIRTIO_CRYPTO_NOTSUPP;
138     }
139 
140     return -VIRTIO_CRYPTO_ERR;
141 }
142 
143 static void
144 cryptodev_backend_get_queues(Object *obj, Visitor *v, const char *name,
145                              void *opaque, Error **errp)
146 {
147     CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
148     uint32_t value = backend->conf.peers.queues;
149 
150     visit_type_uint32(v, name, &value, errp);
151 }
152 
153 static void
154 cryptodev_backend_set_queues(Object *obj, Visitor *v, const char *name,
155                              void *opaque, Error **errp)
156 {
157     CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
158     Error *local_err = NULL;
159     uint32_t value;
160 
161     visit_type_uint32(v, name, &value, &local_err);
162     if (local_err) {
163         goto out;
164     }
165     if (!value) {
166         error_setg(&local_err, "Property '%s.%s' doesn't take value '%"
167                    PRIu32 "'", object_get_typename(obj), name, value);
168         goto out;
169     }
170     backend->conf.peers.queues = value;
171 out:
172     error_propagate(errp, local_err);
173 }
174 
175 static void
176 cryptodev_backend_complete(UserCreatable *uc, Error **errp)
177 {
178     CryptoDevBackend *backend = CRYPTODEV_BACKEND(uc);
179     CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_GET_CLASS(uc);
180     Error *local_err = NULL;
181 
182     if (bc->init) {
183         bc->init(backend, &local_err);
184         if (local_err) {
185             goto out;
186         }
187     }
188 
189     return;
190 
191 out:
192     error_propagate(errp, local_err);
193 }
194 
195 void cryptodev_backend_set_used(CryptoDevBackend *backend, bool used)
196 {
197     backend->is_used = used;
198 }
199 
200 bool cryptodev_backend_is_used(CryptoDevBackend *backend)
201 {
202     return backend->is_used;
203 }
204 
205 void cryptodev_backend_set_ready(CryptoDevBackend *backend, bool ready)
206 {
207     backend->ready = ready;
208 }
209 
210 bool cryptodev_backend_is_ready(CryptoDevBackend *backend)
211 {
212     return backend->ready;
213 }
214 
215 static bool
216 cryptodev_backend_can_be_deleted(UserCreatable *uc)
217 {
218     return !cryptodev_backend_is_used(CRYPTODEV_BACKEND(uc));
219 }
220 
221 static void cryptodev_backend_instance_init(Object *obj)
222 {
223     object_property_add(obj, "queues", "uint32",
224                           cryptodev_backend_get_queues,
225                           cryptodev_backend_set_queues,
226                           NULL, NULL, NULL);
227     /* Initialize devices' queues property to 1 */
228     object_property_set_int(obj, 1, "queues", NULL);
229 }
230 
231 static void cryptodev_backend_finalize(Object *obj)
232 {
233     CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
234 
235     cryptodev_backend_cleanup(backend, NULL);
236 }
237 
238 static void
239 cryptodev_backend_class_init(ObjectClass *oc, void *data)
240 {
241     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
242 
243     ucc->complete = cryptodev_backend_complete;
244     ucc->can_be_deleted = cryptodev_backend_can_be_deleted;
245 
246     QTAILQ_INIT(&crypto_clients);
247 }
248 
249 static const TypeInfo cryptodev_backend_info = {
250     .name = TYPE_CRYPTODEV_BACKEND,
251     .parent = TYPE_OBJECT,
252     .instance_size = sizeof(CryptoDevBackend),
253     .instance_init = cryptodev_backend_instance_init,
254     .instance_finalize = cryptodev_backend_finalize,
255     .class_size = sizeof(CryptoDevBackendClass),
256     .class_init = cryptodev_backend_class_init,
257     .interfaces = (InterfaceInfo[]) {
258         { TYPE_USER_CREATABLE },
259         { }
260     }
261 };
262 
263 static void
264 cryptodev_backend_register_types(void)
265 {
266     type_register_static(&cryptodev_backend_info);
267 }
268 
269 type_init(cryptodev_backend_register_types);
270