1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright (c) 2019 HiSilicon Limited. */
3 
4 #ifndef __HISI_SEC_V2_H
5 #define __HISI_SEC_V2_H
6 
7 #include <linux/list.h>
8 
9 #include "../qm.h"
10 #include "sec_crypto.h"
11 
12 /* Algorithm resource per hardware SEC queue */
13 struct sec_alg_res {
14 	u8 *pbuf;
15 	dma_addr_t pbuf_dma;
16 	u8 *c_ivin;
17 	dma_addr_t c_ivin_dma;
18 	u8 *out_mac;
19 	dma_addr_t out_mac_dma;
20 };
21 
22 /* Cipher request of SEC private */
23 struct sec_cipher_req {
24 	struct hisi_acc_hw_sgl *c_in;
25 	dma_addr_t c_in_dma;
26 	struct hisi_acc_hw_sgl *c_out;
27 	dma_addr_t c_out_dma;
28 	u8 *c_ivin;
29 	dma_addr_t c_ivin_dma;
30 	struct skcipher_request *sk_req;
31 	u32 c_len;
32 	bool encrypt;
33 };
34 
35 struct sec_aead_req {
36 	u8 *out_mac;
37 	dma_addr_t out_mac_dma;
38 	struct aead_request *aead_req;
39 };
40 
41 /* SEC request of Crypto */
42 struct sec_req {
43 	struct sec_sqe sec_sqe;
44 	struct sec_ctx *ctx;
45 	struct sec_qp_ctx *qp_ctx;
46 
47 	struct sec_cipher_req c_req;
48 	struct sec_aead_req aead_req;
49 
50 	int err_type;
51 	int req_id;
52 
53 	/* Status of the SEC request */
54 	bool fake_busy;
55 	bool use_pbuf;
56 };
57 
58 /**
59  * struct sec_req_op - Operations for SEC request
60  * @buf_map: DMA map the SGL buffers of the request
61  * @buf_unmap: DMA unmap the SGL buffers of the request
62  * @bd_fill: Fill the SEC queue BD
63  * @bd_send: Send the SEC BD into the hardware queue
64  * @callback: Call back for the request
65  * @process: Main processing logic of Skcipher
66  */
67 struct sec_req_op {
68 	int (*buf_map)(struct sec_ctx *ctx, struct sec_req *req);
69 	void (*buf_unmap)(struct sec_ctx *ctx, struct sec_req *req);
70 	void (*do_transfer)(struct sec_ctx *ctx, struct sec_req *req);
71 	int (*bd_fill)(struct sec_ctx *ctx, struct sec_req *req);
72 	int (*bd_send)(struct sec_ctx *ctx, struct sec_req *req);
73 	void (*callback)(struct sec_ctx *ctx, struct sec_req *req, int err);
74 	int (*process)(struct sec_ctx *ctx, struct sec_req *req);
75 };
76 
77 /* SEC auth context */
78 struct sec_auth_ctx {
79 	dma_addr_t a_key_dma;
80 	u8 *a_key;
81 	u8 a_key_len;
82 	u8 mac_len;
83 	u8 a_alg;
84 	struct crypto_shash *hash_tfm;
85 };
86 
87 /* SEC cipher context which cipher's relatives */
88 struct sec_cipher_ctx {
89 	u8 *c_key;
90 	dma_addr_t c_key_dma;
91 	sector_t iv_offset;
92 	u32 c_gran_size;
93 	u32 ivsize;
94 	u8 c_mode;
95 	u8 c_alg;
96 	u8 c_key_len;
97 };
98 
99 /* SEC queue context which defines queue's relatives */
100 struct sec_qp_ctx {
101 	struct hisi_qp *qp;
102 	struct sec_req *req_list[QM_Q_DEPTH];
103 	struct idr req_idr;
104 	struct sec_alg_res res[QM_Q_DEPTH];
105 	struct sec_ctx *ctx;
106 	struct mutex req_lock;
107 	struct hisi_acc_sgl_pool *c_in_pool;
108 	struct hisi_acc_sgl_pool *c_out_pool;
109 	atomic_t pending_reqs;
110 };
111 
112 enum sec_alg_type {
113 	SEC_SKCIPHER,
114 	SEC_AEAD
115 };
116 
117 /* SEC Crypto TFM context which defines queue and cipher .etc relatives */
118 struct sec_ctx {
119 	struct sec_qp_ctx *qp_ctx;
120 	struct sec_dev *sec;
121 	const struct sec_req_op *req_op;
122 	struct hisi_qp **qps;
123 
124 	/* Half queues for encipher, and half for decipher */
125 	u32 hlf_q_num;
126 
127 	/* Threshold for fake busy, trigger to return -EBUSY to user */
128 	u32 fake_req_limit;
129 
130 	/* Currrent cyclic index to select a queue for encipher */
131 	atomic_t enc_qcyclic;
132 
133 	 /* Currrent cyclic index to select a queue for decipher */
134 	atomic_t dec_qcyclic;
135 
136 	enum sec_alg_type alg_type;
137 	bool pbuf_supported;
138 	struct sec_cipher_ctx c_ctx;
139 	struct sec_auth_ctx a_ctx;
140 };
141 
142 enum sec_endian {
143 	SEC_LE = 0,
144 	SEC_32BE,
145 	SEC_64BE
146 };
147 
148 enum sec_debug_file_index {
149 	SEC_CURRENT_QM,
150 	SEC_CLEAR_ENABLE,
151 	SEC_DEBUG_FILE_NUM,
152 };
153 
154 struct sec_debug_file {
155 	enum sec_debug_file_index index;
156 	spinlock_t lock;
157 	struct hisi_qm *qm;
158 };
159 
160 struct sec_dfx {
161 	atomic64_t send_cnt;
162 	atomic64_t recv_cnt;
163 };
164 
165 struct sec_debug {
166 	struct sec_dfx dfx;
167 	struct sec_debug_file files[SEC_DEBUG_FILE_NUM];
168 };
169 
170 struct sec_dev {
171 	struct hisi_qm qm;
172 	struct sec_debug debug;
173 	u32 ctx_q_num;
174 	bool iommu_used;
175 	u32 num_vfs;
176 	unsigned long status;
177 };
178 
179 void sec_destroy_qps(struct hisi_qp **qps, int qp_num);
180 struct hisi_qp **sec_create_qps(void);
181 int sec_register_to_crypto(void);
182 void sec_unregister_from_crypto(void);
183 #endif
184