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