1 /* Common header for Virtio crypto device.
3 * Copyright 2016 HUAWEI TECHNOLOGIES CO., LTD.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, see <http://www.gnu.org/licenses/>.
19 #ifndef _VIRTIO_CRYPTO_COMMON_H
20 #define _VIRTIO_CRYPTO_COMMON_H
22 #include <linux/virtio.h>
23 #include <linux/crypto.h>
24 #include <linux/spinlock.h>
25 #include <linux/interrupt.h>
26 #include <crypto/aead.h>
27 #include <crypto/aes.h>
28 #include <crypto/engine.h>
31 /* Internal representation of a data virtqueue */
33 /* Virtqueue associated with this send _queue */
36 /* To protect the vq operations for the dataq */
39 /* Name of the tx queue: dataq.$index */
42 struct crypto_engine *engine;
43 struct tasklet_struct done_task;
46 struct virtio_crypto {
47 struct virtio_device *vdev;
48 struct virtqueue *ctrl_vq;
49 struct data_queue *data_vq;
51 /* To protect the vq operations for the controlq */
54 /* Maximum of data queues supported by the device */
57 /* Number of queue currently used by the driver */
61 * Specifies the services mask which the device support,
62 * see VIRTIO_CRYPTO_SERVICE_*
66 /* Detailed algorithms mask */
74 /* Maximum length of cipher key */
75 u32 max_cipher_key_len;
76 /* Maximum length of authenticated key */
78 /* Maximum size of per request */
81 /* Control VQ buffers: protected by the ctrl_lock */
82 struct virtio_crypto_op_ctrl_req ctrl;
83 struct virtio_crypto_session_input input;
84 struct virtio_crypto_inhdr ctrl_status;
88 struct list_head list;
92 /* Does the affinity hint is set for virtqueues? */
93 bool affinity_hint_set;
96 struct virtio_crypto_sym_session_info {
97 /* Backend session id, which come from the host side */
101 struct virtio_crypto_request;
102 typedef void (*virtio_crypto_data_callback)
103 (struct virtio_crypto_request *vc_req, int len);
105 struct virtio_crypto_request {
107 struct virtio_crypto_op_data_req *req_data;
108 struct scatterlist **sgs;
109 struct data_queue *dataq;
110 virtio_crypto_data_callback alg_cb;
113 int virtcrypto_devmgr_add_dev(struct virtio_crypto *vcrypto_dev);
114 struct list_head *virtcrypto_devmgr_get_head(void);
115 void virtcrypto_devmgr_rm_dev(struct virtio_crypto *vcrypto_dev);
116 struct virtio_crypto *virtcrypto_devmgr_get_first(void);
117 int virtcrypto_dev_in_use(struct virtio_crypto *vcrypto_dev);
118 int virtcrypto_dev_get(struct virtio_crypto *vcrypto_dev);
119 void virtcrypto_dev_put(struct virtio_crypto *vcrypto_dev);
120 int virtcrypto_dev_started(struct virtio_crypto *vcrypto_dev);
121 bool virtcrypto_algo_is_supported(struct virtio_crypto *vcrypto_dev,
124 struct virtio_crypto *virtcrypto_get_dev_node(int node,
127 int virtcrypto_dev_start(struct virtio_crypto *vcrypto);
128 void virtcrypto_dev_stop(struct virtio_crypto *vcrypto);
129 int virtio_crypto_ablkcipher_crypt_req(
130 struct crypto_engine *engine, void *vreq);
133 virtcrypto_clear_request(struct virtio_crypto_request *vc_req);
135 static inline int virtio_crypto_get_current_node(void)
140 node = topology_physical_package_id(cpu);
146 int virtio_crypto_algs_register(struct virtio_crypto *vcrypto);
147 void virtio_crypto_algs_unregister(struct virtio_crypto *vcrypto);
149 #endif /* _VIRTIO_CRYPTO_COMMON_H */