1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* Common header for Virtio crypto device.
4 * Copyright 2016 HUAWEI TECHNOLOGIES CO., LTD.
7 #ifndef _VIRTIO_CRYPTO_COMMON_H
8 #define _VIRTIO_CRYPTO_COMMON_H
10 #include <linux/virtio.h>
11 #include <linux/crypto.h>
12 #include <linux/spinlock.h>
13 #include <crypto/aead.h>
14 #include <crypto/aes.h>
15 #include <crypto/engine.h>
16 #include <uapi/linux/virtio_crypto.h>
19 /* Internal representation of a data virtqueue */
21 /* Virtqueue associated with this send _queue */
24 /* To protect the vq operations for the dataq */
27 /* Name of the tx queue: dataq.$index */
30 struct crypto_engine *engine;
33 struct virtio_crypto {
34 struct virtio_device *vdev;
35 struct virtqueue *ctrl_vq;
36 struct data_queue *data_vq;
38 /* Work struct for config space updates */
39 struct work_struct config_work;
41 /* To protect the vq operations for the controlq */
44 /* Maximum of data queues supported by the device */
47 /* Number of queue currently used by the driver */
51 * Specifies the services mask which the device support,
52 * see VIRTIO_CRYPTO_SERVICE_*
56 /* Detailed algorithms mask */
65 /* Maximum length of cipher key */
66 u32 max_cipher_key_len;
67 /* Maximum length of authenticated key */
69 /* Maximum size of per request */
74 struct list_head list;
78 /* Does the affinity hint is set for virtqueues? */
79 bool affinity_hint_set;
82 struct virtio_crypto_sym_session_info {
83 /* Backend session id, which come from the host side */
88 * Note: there are padding fields in request, clear them to zero before
89 * sending to host to avoid to divulge any information.
90 * Ex, virtio_crypto_ctrl_request::ctrl::u::destroy_session::padding[48]
92 struct virtio_crypto_ctrl_request {
93 struct virtio_crypto_op_ctrl_req ctrl;
94 struct virtio_crypto_session_input input;
95 struct virtio_crypto_inhdr ctrl_status;
96 struct completion compl;
99 struct virtio_crypto_request;
100 typedef void (*virtio_crypto_data_callback)
101 (struct virtio_crypto_request *vc_req, int len);
103 struct virtio_crypto_request {
105 struct virtio_crypto_op_data_req *req_data;
106 struct scatterlist **sgs;
107 struct data_queue *dataq;
108 virtio_crypto_data_callback alg_cb;
111 int virtcrypto_devmgr_add_dev(struct virtio_crypto *vcrypto_dev);
112 struct list_head *virtcrypto_devmgr_get_head(void);
113 void virtcrypto_devmgr_rm_dev(struct virtio_crypto *vcrypto_dev);
114 struct virtio_crypto *virtcrypto_devmgr_get_first(void);
115 int virtcrypto_dev_in_use(struct virtio_crypto *vcrypto_dev);
116 int virtcrypto_dev_get(struct virtio_crypto *vcrypto_dev);
117 void virtcrypto_dev_put(struct virtio_crypto *vcrypto_dev);
118 int virtcrypto_dev_started(struct virtio_crypto *vcrypto_dev);
119 bool virtcrypto_algo_is_supported(struct virtio_crypto *vcrypto_dev,
122 struct virtio_crypto *virtcrypto_get_dev_node(int node,
125 int virtcrypto_dev_start(struct virtio_crypto *vcrypto);
126 void virtcrypto_dev_stop(struct virtio_crypto *vcrypto);
127 int virtio_crypto_skcipher_crypt_req(
128 struct crypto_engine *engine, void *vreq);
131 virtcrypto_clear_request(struct virtio_crypto_request *vc_req);
133 static inline int virtio_crypto_get_current_node(void)
138 node = topology_physical_package_id(cpu);
144 int virtio_crypto_skcipher_algs_register(struct virtio_crypto *vcrypto);
145 void virtio_crypto_skcipher_algs_unregister(struct virtio_crypto *vcrypto);
146 int virtio_crypto_akcipher_algs_register(struct virtio_crypto *vcrypto);
147 void virtio_crypto_akcipher_algs_unregister(struct virtio_crypto *vcrypto);
148 int virtio_crypto_ctrl_vq_request(struct virtio_crypto *vcrypto, struct scatterlist *sgs[],
149 unsigned int out_sgs, unsigned int in_sgs,
150 struct virtio_crypto_ctrl_request *vc_ctrl_req);
152 #endif /* _VIRTIO_CRYPTO_COMMON_H */