tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/* Common header for Virtio crypto device.
2 *
3 * Copyright 2016 HUAWEI TECHNOLOGIES CO., LTD.
4 *
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.
9 *
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.
14 *
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/>.
17 */
18
19#ifndef _VIRTIO_CRYPTO_COMMON_H
20#define _VIRTIO_CRYPTO_COMMON_H
21
22#include <linux/virtio.h>
23#include <linux/crypto.h>
24#include <linux/spinlock.h>
25#include <crypto/aead.h>
26#include <crypto/aes.h>
27#include <crypto/engine.h>
28
29
30/* Internal representation of a data virtqueue */
31struct data_queue {
32 /* Virtqueue associated with this send _queue */
33 struct virtqueue *vq;
34
35 /* To protect the vq operations for the dataq */
36 spinlock_t lock;
37
38 /* Name of the tx queue: dataq.$index */
39 char name[32];
40
41 struct crypto_engine *engine;
42};
43
44struct virtio_crypto {
45 struct virtio_device *vdev;
46 struct virtqueue *ctrl_vq;
47 struct data_queue *data_vq;
48
49 /* To protect the vq operations for the controlq */
50 spinlock_t ctrl_lock;
51
52 /* Maximum of data queues supported by the device */
53 u32 max_data_queues;
54
55 /* Number of queue currently used by the driver */
56 u32 curr_queue;
57
58 /*
59 * Specifies the services mask which the device support,
60 * see VIRTIO_CRYPTO_SERVICE_*
61 */
62 u32 crypto_services;
63
64 /* Detailed algorithms mask */
65 u32 cipher_algo_l;
66 u32 cipher_algo_h;
67 u32 hash_algo;
68 u32 mac_algo_l;
69 u32 mac_algo_h;
70 u32 aead_algo;
71
72 /* Maximum length of cipher key */
73 u32 max_cipher_key_len;
74 /* Maximum length of authenticated key */
75 u32 max_auth_key_len;
76 /* Maximum size of per request */
77 u64 max_size;
78
79 /* Control VQ buffers: protected by the ctrl_lock */
80 struct virtio_crypto_op_ctrl_req ctrl;
81 struct virtio_crypto_session_input input;
82 struct virtio_crypto_inhdr ctrl_status;
83
84 unsigned long status;
85 atomic_t ref_count;
86 struct list_head list;
87 struct module *owner;
88 uint8_t dev_id;
89
90 /* Does the affinity hint is set for virtqueues? */
91 bool affinity_hint_set;
92};
93
94struct virtio_crypto_sym_session_info {
95 /* Backend session id, which come from the host side */
96 __u64 session_id;
97};
98
99struct virtio_crypto_request;
100typedef void (*virtio_crypto_data_callback)
101 (struct virtio_crypto_request *vc_req, int len);
102
103struct virtio_crypto_request {
104 uint8_t status;
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;
109};
110
111int virtcrypto_devmgr_add_dev(struct virtio_crypto *vcrypto_dev);
112struct list_head *virtcrypto_devmgr_get_head(void);
113void virtcrypto_devmgr_rm_dev(struct virtio_crypto *vcrypto_dev);
114struct virtio_crypto *virtcrypto_devmgr_get_first(void);
115int virtcrypto_dev_in_use(struct virtio_crypto *vcrypto_dev);
116int virtcrypto_dev_get(struct virtio_crypto *vcrypto_dev);
117void virtcrypto_dev_put(struct virtio_crypto *vcrypto_dev);
118int virtcrypto_dev_started(struct virtio_crypto *vcrypto_dev);
119bool virtcrypto_algo_is_supported(struct virtio_crypto *vcrypto_dev,
120 uint32_t service,
121 uint32_t algo);
122struct virtio_crypto *virtcrypto_get_dev_node(int node,
123 uint32_t service,
124 uint32_t algo);
125int virtcrypto_dev_start(struct virtio_crypto *vcrypto);
126void virtcrypto_dev_stop(struct virtio_crypto *vcrypto);
127int virtio_crypto_ablkcipher_crypt_req(
128 struct crypto_engine *engine, void *vreq);
129
130void
131virtcrypto_clear_request(struct virtio_crypto_request *vc_req);
132
133static inline int virtio_crypto_get_current_node(void)
134{
135 int cpu, node;
136
137 cpu = get_cpu();
138 node = topology_physical_package_id(cpu);
139 put_cpu();
140
141 return node;
142}
143
144int virtio_crypto_algs_register(struct virtio_crypto *vcrypto);
145void virtio_crypto_algs_unregister(struct virtio_crypto *vcrypto);
146
147#endif /* _VIRTIO_CRYPTO_COMMON_H */