backends/cryptodev.c

   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     backend->ready = false;
  78 }
  79
  80 int64_t cryptodev_backend_sym_create_session(
  81            CryptoDevBackend *backend,
  82            CryptoDevBackendSymSessionInfo *sess_info,
  83            uint32_t queue_index, Error **errp)
  84 {
  85     CryptoDevBackendClass *bc =
  86                       CRYPTODEV_BACKEND_GET_CLASS(backend);
  87
  88     if (bc->create_session) {
  89         return bc->create_session(backend, sess_info, queue_index, errp);
  90     }
  91
  92     return -1;
  93 }
  94
  95 int cryptodev_backend_sym_close_session(
  96            CryptoDevBackend *backend,
  97            uint64_t session_id,
  98            uint32_t queue_index, Error **errp)
  99 {
 100     CryptoDevBackendClass *bc =
 101                       CRYPTODEV_BACKEND_GET_CLASS(backend);
 102
 103     if (bc->close_session) {
 104         return bc->close_session(backend, session_id, queue_index, errp);
 105     }
 106
 107     return -1;
 108 }
 109
 110 static int cryptodev_backend_sym_operation(
 111                  CryptoDevBackend *backend,
 112                  CryptoDevBackendSymOpInfo *op_info,
 113                  uint32_t queue_index, Error **errp)
 114 {
 115     CryptoDevBackendClass *bc =
 116                       CRYPTODEV_BACKEND_GET_CLASS(backend);
 117
 118     if (bc->do_sym_op) {
 119         return bc->do_sym_op(backend, op_info, queue_index, errp);
 120     }
 121
 122     return -VIRTIO_CRYPTO_ERR;
 123 }
 124
 125 int cryptodev_backend_crypto_operation(
 126                  CryptoDevBackend *backend,
 127                  void *opaque,
 128                  uint32_t queue_index, Error **errp)
 129 {
 130     VirtIOCryptoReq *req = opaque;
 131
 132     if (req->flags == CRYPTODEV_BACKEND_ALG_SYM) {
 133         CryptoDevBackendSymOpInfo *op_info;
 134         op_info = req->u.sym_op_info;
 135
 136         return cryptodev_backend_sym_operation(backend,
 137                          op_info, queue_index, errp);
 138     } else {
 139         error_setg(errp, "Unsupported cryptodev alg type: %" PRIu32 "",
 140                    req->flags);
 141        return -VIRTIO_CRYPTO_NOTSUPP;
 142     }
 143
 144     return -VIRTIO_CRYPTO_ERR;
 145 }
 146
 147 static void
 148 cryptodev_backend_get_queues(Object *obj, Visitor *v, const char *name,
 149                              void *opaque, Error **errp)
 150 {
 151     CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
 152     uint32_t value = backend->conf.peers.queues;
 153
 154     visit_type_uint32(v, name, &value, errp);
 155 }
 156
 157 static void
 158 cryptodev_backend_set_queues(Object *obj, Visitor *v, const char *name,
 159                              void *opaque, Error **errp)
 160 {
 161     CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
 162     Error *local_err = NULL;
 163     uint32_t value;
 164
 165     visit_type_uint32(v, name, &value, &local_err);
 166     if (local_err) {
 167         goto out;
 168     }
 169     if (!value) {
 170         error_setg(&local_err, "Property '%s.%s' doesn't take value '%"
 171                    PRIu32 "'", object_get_typename(obj), name, value);
 172         goto out;
 173     }
 174     backend->conf.peers.queues = value;
 175 out:
 176     error_propagate(errp, local_err);
 177 }
 178
 179 static void
 180 cryptodev_backend_complete(UserCreatable *uc, Error **errp)
 181 {
 182     CryptoDevBackend *backend = CRYPTODEV_BACKEND(uc);
 183     CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_GET_CLASS(uc);
 184     Error *local_err = NULL;
 185
 186     if (bc->init) {
 187         bc->init(backend, &local_err);
 188         if (local_err) {
 189             goto out;
 190         }
 191     }
 192     backend->ready = true;
 193     return;
 194
 195 out:
 196     backend->ready = false;
 197     error_propagate(errp, local_err);
 198 }
 199
 200 static void cryptodev_backend_instance_init(Object *obj)
 201 {
 202     object_property_add(obj, "queues", "int",
 203                           cryptodev_backend_get_queues,
 204                           cryptodev_backend_set_queues,
 205                           NULL, NULL, NULL);
 206     /* Initialize devices' queues property to 1 */
 207     object_property_set_int(obj, 1, "queues", NULL);
 208 }
 209
 210 static void cryptodev_backend_finalize(Object *obj)
 211 {
 212
 213 }
 214
 215 static void
 216 cryptodev_backend_class_init(ObjectClass *oc, void *data)
 217 {
 218     UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
 219
 220     ucc->complete = cryptodev_backend_complete;
 221
 222     QTAILQ_INIT(&crypto_clients);
 223 }
 224
 225 static const TypeInfo cryptodev_backend_info = {
 226     .name = TYPE_CRYPTODEV_BACKEND,
 227     .parent = TYPE_OBJECT,
 228     .instance_size = sizeof(CryptoDevBackend),
 229     .instance_init = cryptodev_backend_instance_init,
 230     .instance_finalize = cryptodev_backend_finalize,
 231     .class_size = sizeof(CryptoDevBackendClass),
 232     .class_init = cryptodev_backend_class_init,
 233     .interfaces = (InterfaceInfo[]) {
 234         { TYPE_USER_CREATABLE },
 235         { }
 236     }
 237 };
 238
 239 static void
 240 cryptodev_backend_register_types(void)
 241 {
 242     type_register_static(&cryptodev_backend_info);
 243 }
 244
 245 type_init(cryptodev_backend_register_types);