summaryrefslogtreecommitdiffstats
path: root/drivers/crypto/hisilicon/sec2/sec.h
blob: 26754d0570ba9cffcf829b873ec2ecab69c2abe6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2019 HiSilicon Limited. */

#ifndef __HISI_SEC_V2_H
#define __HISI_SEC_V2_H

#include <linux/list.h>

#include "../qm.h"
#include "sec_crypto.h"

/* Cipher resource per hardware SEC queue */
struct sec_cipher_res {
	u8 *c_ivin;
	dma_addr_t c_ivin_dma;
};

/* Cipher request of SEC private */
struct sec_cipher_req {
	struct hisi_acc_hw_sgl *c_in;
	dma_addr_t c_in_dma;
	struct hisi_acc_hw_sgl *c_out;
	dma_addr_t c_out_dma;
	u8 *c_ivin;
	dma_addr_t c_ivin_dma;
	struct skcipher_request *sk_req;
	u32 c_len;
	bool encrypt;
};

/* SEC request of Crypto */
struct sec_req {
	struct sec_sqe sec_sqe;
	struct sec_ctx *ctx;
	struct sec_qp_ctx *qp_ctx;

	/* Cipher supported only at present */
	struct sec_cipher_req c_req;
	int err_type;
	int req_id;

	/* Status of the SEC request */
	int fake_busy;
};

/**
 * struct sec_req_op - Operations for SEC request
 * @get_res: Get resources for TFM on the SEC device
 * @resource_alloc: Allocate resources for queue context on the SEC device
 * @resource_free: Free resources for queue context on the SEC device
 * @buf_map: DMA map the SGL buffers of the request
 * @buf_unmap: DMA unmap the SGL buffers of the request
 * @bd_fill: Fill the SEC queue BD
 * @bd_send: Send the SEC BD into the hardware queue
 * @callback: Call back for the request
 * @process: Main processing logic of Skcipher
 */
struct sec_req_op {
	int (*get_res)(struct sec_ctx *ctx, struct sec_req *req);
	int (*resource_alloc)(struct sec_ctx *ctx, struct sec_qp_ctx *qp_ctx);
	void (*resource_free)(struct sec_ctx *ctx, struct sec_qp_ctx *qp_ctx);
	int (*buf_map)(struct sec_ctx *ctx, struct sec_req *req);
	void (*buf_unmap)(struct sec_ctx *ctx, struct sec_req *req);
	void (*do_transfer)(struct sec_ctx *ctx, struct sec_req *req);
	int (*bd_fill)(struct sec_ctx *ctx, struct sec_req *req);
	int (*bd_send)(struct sec_ctx *ctx, struct sec_req *req);
	void (*callback)(struct sec_ctx *ctx, struct sec_req *req);
	int (*process)(struct sec_ctx *ctx, struct sec_req *req);
};

/* SEC cipher context which cipher's relatives */
struct sec_cipher_ctx {
	u8 *c_key;
	dma_addr_t c_key_dma;
	sector_t iv_offset;
	u32 c_gran_size;
	u32 ivsize;
	u8 c_mode;
	u8 c_alg;
	u8 c_key_len;
};

/* SEC queue context which defines queue's relatives */
struct sec_qp_ctx {
	struct hisi_qp *qp;
	struct sec_req **req_list;
	struct idr req_idr;
	void *alg_meta_data;
	struct sec_ctx *ctx;
	struct mutex req_lock;
	struct hisi_acc_sgl_pool *c_in_pool;
	struct hisi_acc_sgl_pool *c_out_pool;
	atomic_t pending_reqs;
};

/* SEC Crypto TFM context which defines queue and cipher .etc relatives */
struct sec_ctx {
	struct sec_qp_ctx *qp_ctx;
	struct sec_dev *sec;
	const struct sec_req_op *req_op;

	/* Half queues for encipher, and half for decipher */
	u32 hlf_q_num;

	/* Threshold for fake busy, trigger to return -EBUSY to user */
	u32 fake_req_limit;

	/* Currrent cyclic index to select a queue for encipher */
	atomic_t enc_qcyclic;

	 /* Currrent cyclic index to select a queue for decipher */
	atomic_t dec_qcyclic;
	struct sec_cipher_ctx c_ctx;
};

enum sec_endian {
	SEC_LE = 0,
	SEC_32BE,
	SEC_64BE
};

enum sec_debug_file_index {
	SEC_CURRENT_QM,
	SEC_CLEAR_ENABLE,
	SEC_DEBUG_FILE_NUM,
};

struct sec_debug_file {
	enum sec_debug_file_index index;
	spinlock_t lock;
	struct hisi_qm *qm;
};

struct sec_dfx {
	u64 send_cnt;
	u64 recv_cnt;
};

struct sec_debug {
	struct sec_dfx dfx;
	struct sec_debug_file files[SEC_DEBUG_FILE_NUM];
};

struct sec_dev {
	struct hisi_qm qm;
	struct list_head list;
	struct sec_debug debug;
	u32 ctx_q_num;
	u32 num_vfs;
	unsigned long status;
};

struct sec_dev *sec_find_device(int node);
int sec_register_to_crypto(void);
void sec_unregister_from_crypto(void);
#endif