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 | Error *local_err = NULL; |
180 | |
181 | if (bc->init) { |
182 | bc->init(backend, &local_err); |
183 | if (local_err) { |
184 | goto out; |
185 | } |
186 | } |
187 | |
188 | return; |
189 | |
190 | out: |
191 | error_propagate(errp, local_err); |
192 | } |
193 | |
194 | void cryptodev_backend_set_used(CryptoDevBackend *backend, bool used) |
195 | { |
196 | backend->is_used = used; |
197 | } |
198 | |
199 | bool cryptodev_backend_is_used(CryptoDevBackend *backend) |
200 | { |
201 | return backend->is_used; |
202 | } |
203 | |
204 | void cryptodev_backend_set_ready(CryptoDevBackend *backend, bool ready) |
205 | { |
206 | backend->ready = ready; |
207 | } |
208 | |
209 | bool cryptodev_backend_is_ready(CryptoDevBackend *backend) |
210 | { |
211 | return backend->ready; |
212 | } |
213 | |
214 | static bool |
215 | cryptodev_backend_can_be_deleted(UserCreatable *uc) |
216 | { |
217 | return !cryptodev_backend_is_used(CRYPTODEV_BACKEND(uc)); |
218 | } |
219 | |
220 | static void cryptodev_backend_instance_init(Object *obj) |
221 | { |
222 | object_property_add(obj, "queues" , "uint32" , |
223 | cryptodev_backend_get_queues, |
224 | cryptodev_backend_set_queues, |
225 | NULL, NULL, NULL); |
226 | /* Initialize devices' queues property to 1 */ |
227 | object_property_set_int(obj, 1, "queues" , NULL); |
228 | } |
229 | |
230 | static void cryptodev_backend_finalize(Object *obj) |
231 | { |
232 | CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj); |
233 | |
234 | cryptodev_backend_cleanup(backend, NULL); |
235 | } |
236 | |
237 | static void |
238 | cryptodev_backend_class_init(ObjectClass *oc, void *data) |
239 | { |
240 | UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc); |
241 | |
242 | ucc->complete = cryptodev_backend_complete; |
243 | ucc->can_be_deleted = cryptodev_backend_can_be_deleted; |
244 | |
245 | QTAILQ_INIT(&crypto_clients); |
246 | } |
247 | |
248 | static const TypeInfo cryptodev_backend_info = { |
249 | .name = TYPE_CRYPTODEV_BACKEND, |
250 | .parent = TYPE_OBJECT, |
251 | .instance_size = sizeof(CryptoDevBackend), |
252 | .instance_init = cryptodev_backend_instance_init, |
253 | .instance_finalize = cryptodev_backend_finalize, |
254 | .class_size = sizeof(CryptoDevBackendClass), |
255 | .class_init = cryptodev_backend_class_init, |
256 | .interfaces = (InterfaceInfo[]) { |
257 | { TYPE_USER_CREATABLE }, |
258 | { } |
259 | } |
260 | }; |
261 | |
262 | static void |
263 | cryptodev_backend_register_types(void) |
264 | { |
265 | type_register_static(&cryptodev_backend_info); |
266 | } |
267 | |
268 | type_init(cryptodev_backend_register_types); |
269 | |