tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
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/authenc.h>
28#include <crypto/engine.h>
29
30
31/* Internal representation of a data virtqueue */
32struct data_queue {
33 /* Virtqueue associated with this send _queue */
34 struct virtqueue *vq;
35
36 /* To protect the vq operations for the dataq */
37 spinlock_t lock;
38
39 /* Name of the tx queue: dataq.$index */
40 char name[32];
41
42 struct crypto_engine *engine;
43};
44
45struct virtio_crypto {
46 struct virtio_device *vdev;
47 struct virtqueue *ctrl_vq;
48 struct data_queue *data_vq;
49
50 /* To protect the vq operations for the controlq */
51 spinlock_t ctrl_lock;
52
53 /* Maximum of data queues supported by the device */
54 u32 max_data_queues;
55
56 /* Number of queue currently used by the driver */
57 u32 curr_queue;
58
59 /* Maximum length of cipher key */
60 u32 max_cipher_key_len;
61 /* Maximum length of authenticated key */
62 u32 max_auth_key_len;
63 /* Maximum size of per request */
64 u64 max_size;
65
66 /* Control VQ buffers: protected by the ctrl_lock */
67 struct virtio_crypto_op_ctrl_req ctrl;
68 struct virtio_crypto_session_input input;
69 struct virtio_crypto_inhdr ctrl_status;
70
71 unsigned long status;
72 atomic_t ref_count;
73 struct list_head list;
74 struct module *owner;
75 uint8_t dev_id;
76
77 /* Does the affinity hint is set for virtqueues? */
78 bool affinity_hint_set;
79};
80
81struct virtio_crypto_sym_session_info {
82 /* Backend session id, which come from the host side */
83 __u64 session_id;
84};
85
86struct virtio_crypto_ablkcipher_ctx {
87 struct virtio_crypto *vcrypto;
88 struct crypto_tfm *tfm;
89
90 struct virtio_crypto_sym_session_info enc_sess_info;
91 struct virtio_crypto_sym_session_info dec_sess_info;
92};
93
94struct virtio_crypto_request {
95 /* Cipher or aead */
96 uint32_t type;
97 uint8_t status;
98 struct virtio_crypto_ablkcipher_ctx *ablkcipher_ctx;
99 struct ablkcipher_request *ablkcipher_req;
100 struct virtio_crypto_op_data_req *req_data;
101 struct scatterlist **sgs;
102 uint8_t *iv;
103 /* Encryption? */
104 bool encrypt;
105 struct data_queue *dataq;
106};
107
108int virtcrypto_devmgr_add_dev(struct virtio_crypto *vcrypto_dev);
109struct list_head *virtcrypto_devmgr_get_head(void);
110void virtcrypto_devmgr_rm_dev(struct virtio_crypto *vcrypto_dev);
111struct virtio_crypto *virtcrypto_devmgr_get_first(void);
112int virtcrypto_dev_in_use(struct virtio_crypto *vcrypto_dev);
113int virtcrypto_dev_get(struct virtio_crypto *vcrypto_dev);
114void virtcrypto_dev_put(struct virtio_crypto *vcrypto_dev);
115int virtcrypto_dev_started(struct virtio_crypto *vcrypto_dev);
116struct virtio_crypto *virtcrypto_get_dev_node(int node);
117int virtcrypto_dev_start(struct virtio_crypto *vcrypto);
118void virtcrypto_dev_stop(struct virtio_crypto *vcrypto);
119int virtio_crypto_ablkcipher_crypt_req(
120 struct crypto_engine *engine,
121 struct ablkcipher_request *req);
122void virtio_crypto_ablkcipher_finalize_req(
123 struct virtio_crypto_request *vc_req,
124 struct ablkcipher_request *req,
125 int err);
126
127void
128virtcrypto_clear_request(struct virtio_crypto_request *vc_req);
129
130static inline int virtio_crypto_get_current_node(void)
131{
132 int cpu, node;
133
134 cpu = get_cpu();
135 node = topology_physical_package_id(cpu);
136 put_cpu();
137
138 return node;
139}
140
141int virtio_crypto_algs_register(void);
142void virtio_crypto_algs_unregister(void);
143
144#endif /* _VIRTIO_CRYPTO_COMMON_H */