Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/* Common header for Virtio crypto device.
3 *
4 * Copyright 2016 HUAWEI TECHNOLOGIES CO., LTD.
5 */
6
7#ifndef _VIRTIO_CRYPTO_COMMON_H
8#define _VIRTIO_CRYPTO_COMMON_H
9
10#include <linux/virtio.h>
11#include <linux/crypto.h>
12#include <linux/spinlock.h>
13#include <linux/interrupt.h>
14#include <linux/workqueue.h>
15#include <crypto/aead.h>
16#include <crypto/aes.h>
17#include <crypto/engine.h>
18#include <uapi/linux/virtio_crypto.h>
19
20
21/* Internal representation of a data virtqueue */
22struct data_queue {
23 /* Virtqueue associated with this send _queue */
24 struct virtqueue *vq;
25
26 /* To protect the vq operations for the dataq */
27 spinlock_t lock;
28
29 /* Name of the tx queue: dataq.$index */
30 char name[32];
31
32 struct crypto_engine *engine;
33 struct work_struct done_work;
34};
35
36struct virtio_crypto {
37 struct virtio_device *vdev;
38 struct virtqueue *ctrl_vq;
39 struct data_queue *data_vq;
40
41 /* Work struct for config space updates */
42 struct work_struct config_work;
43
44 /* To protect the vq operations for the controlq */
45 spinlock_t ctrl_lock;
46
47 /* Maximum of data queues supported by the device */
48 u32 max_data_queues;
49
50 /* Number of queue currently used by the driver */
51 u32 curr_queue;
52
53 /*
54 * Specifies the services mask which the device support,
55 * see VIRTIO_CRYPTO_SERVICE_*
56 */
57 u32 crypto_services;
58
59 /* Detailed algorithms mask */
60 u32 cipher_algo_l;
61 u32 cipher_algo_h;
62 u32 hash_algo;
63 u32 mac_algo_l;
64 u32 mac_algo_h;
65 u32 aead_algo;
66 u32 akcipher_algo;
67
68 /* Maximum length of cipher key */
69 u32 max_cipher_key_len;
70 /* Maximum length of authenticated key */
71 u32 max_auth_key_len;
72 /* Maximum size of per request */
73 u64 max_size;
74
75 unsigned long status;
76 atomic_t ref_count;
77 struct list_head list;
78 struct module *owner;
79 uint8_t dev_id;
80
81 /* Does the affinity hint is set for virtqueues? */
82 bool affinity_hint_set;
83};
84
85struct virtio_crypto_sym_session_info {
86 /* Backend session id, which come from the host side */
87 __u64 session_id;
88};
89
90/*
91 * Note: there are padding fields in request, clear them to zero before
92 * sending to host to avoid to divulge any information.
93 * Ex, virtio_crypto_ctrl_request::ctrl::u::destroy_session::padding[48]
94 */
95struct virtio_crypto_ctrl_request {
96 struct virtio_crypto_op_ctrl_req ctrl;
97 struct virtio_crypto_session_input input;
98 struct virtio_crypto_inhdr ctrl_status;
99 struct completion compl;
100};
101
102struct virtio_crypto_request;
103typedef void (*virtio_crypto_data_callback)
104 (struct virtio_crypto_request *vc_req, int len);
105
106struct virtio_crypto_request {
107 uint8_t status;
108 struct virtio_crypto_op_data_req *req_data;
109 struct scatterlist **sgs;
110 struct data_queue *dataq;
111 virtio_crypto_data_callback alg_cb;
112};
113
114int virtcrypto_devmgr_add_dev(struct virtio_crypto *vcrypto_dev);
115struct list_head *virtcrypto_devmgr_get_head(void);
116void virtcrypto_devmgr_rm_dev(struct virtio_crypto *vcrypto_dev);
117int virtcrypto_dev_get(struct virtio_crypto *vcrypto_dev);
118void virtcrypto_dev_put(struct virtio_crypto *vcrypto_dev);
119int virtcrypto_dev_started(struct virtio_crypto *vcrypto_dev);
120bool virtcrypto_algo_is_supported(struct virtio_crypto *vcrypto_dev,
121 uint32_t service,
122 uint32_t algo);
123struct virtio_crypto *virtcrypto_get_dev_node(int node,
124 uint32_t service,
125 uint32_t algo);
126int virtcrypto_dev_start(struct virtio_crypto *vcrypto);
127void virtcrypto_dev_stop(struct virtio_crypto *vcrypto);
128int virtio_crypto_skcipher_crypt_req(
129 struct crypto_engine *engine, void *vreq);
130
131void
132virtcrypto_clear_request(struct virtio_crypto_request *vc_req);
133
134static inline int virtio_crypto_get_current_node(void)
135{
136 int cpu, node;
137
138 cpu = get_cpu();
139 node = cpu_to_node(cpu);
140 put_cpu();
141
142 return node;
143}
144
145int virtio_crypto_skcipher_algs_register(struct virtio_crypto *vcrypto);
146void virtio_crypto_skcipher_algs_unregister(struct virtio_crypto *vcrypto);
147int virtio_crypto_akcipher_algs_register(struct virtio_crypto *vcrypto);
148void virtio_crypto_akcipher_algs_unregister(struct virtio_crypto *vcrypto);
149int virtio_crypto_ctrl_vq_request(struct virtio_crypto *vcrypto, struct scatterlist *sgs[],
150 unsigned int out_sgs, unsigned int in_sgs,
151 struct virtio_crypto_ctrl_request *vc_ctrl_req);
152
153#endif /* _VIRTIO_CRYPTO_COMMON_H */