1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /**
3  * AMCC SoC PPC4xx Crypto Driver
4  *
5  * Copyright (c) 2008 Applied Micro Circuits Corporation.
6  * All rights reserved. James Hsiao <jhsiao@amcc.com>
7  *
8  * This is the header file for AMCC Crypto offload Linux device driver for
9  * use with Linux CryptoAPI.
10 
11  */
12 
13 #ifndef __CRYPTO4XX_CORE_H__
14 #define __CRYPTO4XX_CORE_H__
15 
16 #include <linux/ratelimit.h>
17 #include <linux/mutex.h>
18 #include <crypto/internal/hash.h>
19 #include <crypto/internal/aead.h>
20 #include <crypto/internal/rng.h>
21 #include <crypto/internal/skcipher.h>
22 #include "crypto4xx_reg_def.h"
23 #include "crypto4xx_sa.h"
24 
25 #define PPC460SX_SDR0_SRST                      0x201
26 #define PPC405EX_SDR0_SRST                      0x200
27 #define PPC460EX_SDR0_SRST                      0x201
28 #define PPC460EX_CE_RESET                       0x08000000
29 #define PPC460SX_CE_RESET                       0x20000000
30 #define PPC405EX_CE_RESET                       0x00000008
31 
32 #define CRYPTO4XX_CRYPTO_PRIORITY		300
33 #define PPC4XX_NUM_PD				256
34 #define PPC4XX_LAST_PD				(PPC4XX_NUM_PD - 1)
35 #define PPC4XX_NUM_GD				1024
36 #define PPC4XX_LAST_GD				(PPC4XX_NUM_GD - 1)
37 #define PPC4XX_NUM_SD				256
38 #define PPC4XX_LAST_SD				(PPC4XX_NUM_SD - 1)
39 #define PPC4XX_SD_BUFFER_SIZE			2048
40 
41 #define PD_ENTRY_BUSY				BIT(1)
42 #define PD_ENTRY_INUSE				BIT(0)
43 #define PD_ENTRY_FREE				0
44 #define ERING_WAS_FULL				0xffffffff
45 
46 struct crypto4xx_device;
47 
48 union shadow_sa_buf {
49 	struct dynamic_sa_ctl sa;
50 
51 	/* alloc 256 bytes which is enough for any kind of dynamic sa */
52 	u8 buf[256];
53 } __packed;
54 
55 struct pd_uinfo {
56 	struct crypto4xx_device *dev;
57 	u32   state;
58 	u32 first_gd;		/* first gather discriptor
59 				used by this packet */
60 	u32 num_gd;             /* number of gather discriptor
61 				used by this packet */
62 	u32 first_sd;		/* first scatter discriptor
63 				used by this packet */
64 	u32 num_sd;		/* number of scatter discriptors
65 				used by this packet */
66 	struct dynamic_sa_ctl *sa_va;	/* shadow sa */
67 	struct sa_state_record *sr_va;	/* state record for shadow sa */
68 	u32 sr_pa;
69 	struct scatterlist *dest_va;
70 	struct crypto_async_request *async_req; 	/* base crypto request
71 							for this packet */
72 };
73 
74 struct crypto4xx_device {
75 	struct crypto4xx_core_device *core_dev;
76 	void __iomem *ce_base;
77 	void __iomem *trng_base;
78 
79 	struct ce_pd *pdr;	/* base address of packet descriptor ring */
80 	dma_addr_t pdr_pa;	/* physical address of pdr_base_register */
81 	struct ce_gd *gdr;	/* gather descriptor ring */
82 	dma_addr_t gdr_pa;	/* physical address of gdr_base_register */
83 	struct ce_sd *sdr;	/* scatter descriptor ring */
84 	dma_addr_t sdr_pa;	/* physical address of sdr_base_register */
85 	void *scatter_buffer_va;
86 	dma_addr_t scatter_buffer_pa;
87 
88 	union shadow_sa_buf *shadow_sa_pool;
89 	dma_addr_t shadow_sa_pool_pa;
90 	struct sa_state_record *shadow_sr_pool;
91 	dma_addr_t shadow_sr_pool_pa;
92 	u32 pdr_tail;
93 	u32 pdr_head;
94 	u32 gdr_tail;
95 	u32 gdr_head;
96 	u32 sdr_tail;
97 	u32 sdr_head;
98 	struct pd_uinfo *pdr_uinfo;
99 	struct list_head alg_list;	/* List of algorithm supported
100 					by this device */
101 	struct ratelimit_state aead_ratelimit;
102 	bool is_revb;
103 };
104 
105 struct crypto4xx_core_device {
106 	struct device *device;
107 	struct platform_device *ofdev;
108 	struct crypto4xx_device *dev;
109 	struct hwrng *trng;
110 	u32 int_status;
111 	u32 irq;
112 	struct tasklet_struct tasklet;
113 	spinlock_t lock;
114 	struct mutex rng_lock;
115 };
116 
117 struct crypto4xx_ctx {
118 	struct crypto4xx_device *dev;
119 	struct dynamic_sa_ctl *sa_in;
120 	struct dynamic_sa_ctl *sa_out;
121 	__le32 iv_nonce;
122 	u32 sa_len;
123 	union {
124 		struct crypto_sync_skcipher *cipher;
125 		struct crypto_aead *aead;
126 	} sw_cipher;
127 };
128 
129 struct crypto4xx_aead_reqctx {
130 	struct scatterlist dst[2];
131 };
132 
133 struct crypto4xx_alg_common {
134 	u32 type;
135 	union {
136 		struct skcipher_alg cipher;
137 		struct ahash_alg hash;
138 		struct aead_alg aead;
139 		struct rng_alg rng;
140 	} u;
141 };
142 
143 struct crypto4xx_alg {
144 	struct list_head  entry;
145 	struct crypto4xx_alg_common alg;
146 	struct crypto4xx_device *dev;
147 };
148 
149 int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size);
150 void crypto4xx_free_sa(struct crypto4xx_ctx *ctx);
151 void crypto4xx_free_ctx(struct crypto4xx_ctx *ctx);
152 int crypto4xx_build_pd(struct crypto_async_request *req,
153 		       struct crypto4xx_ctx *ctx,
154 		       struct scatterlist *src,
155 		       struct scatterlist *dst,
156 		       const unsigned int datalen,
157 		       const __le32 *iv, const u32 iv_len,
158 		       const struct dynamic_sa_ctl *sa,
159 		       const unsigned int sa_len,
160 		       const unsigned int assoclen,
161 		       struct scatterlist *dst_tmp);
162 int crypto4xx_setkey_aes_cbc(struct crypto_skcipher *cipher,
163 			     const u8 *key, unsigned int keylen);
164 int crypto4xx_setkey_aes_cfb(struct crypto_skcipher *cipher,
165 			     const u8 *key, unsigned int keylen);
166 int crypto4xx_setkey_aes_ctr(struct crypto_skcipher *cipher,
167 			     const u8 *key, unsigned int keylen);
168 int crypto4xx_setkey_aes_ecb(struct crypto_skcipher *cipher,
169 			     const u8 *key, unsigned int keylen);
170 int crypto4xx_setkey_aes_ofb(struct crypto_skcipher *cipher,
171 			     const u8 *key, unsigned int keylen);
172 int crypto4xx_setkey_rfc3686(struct crypto_skcipher *cipher,
173 			     const u8 *key, unsigned int keylen);
174 int crypto4xx_encrypt_ctr(struct skcipher_request *req);
175 int crypto4xx_decrypt_ctr(struct skcipher_request *req);
176 int crypto4xx_encrypt_iv_stream(struct skcipher_request *req);
177 int crypto4xx_decrypt_iv_stream(struct skcipher_request *req);
178 int crypto4xx_encrypt_iv_block(struct skcipher_request *req);
179 int crypto4xx_decrypt_iv_block(struct skcipher_request *req);
180 int crypto4xx_encrypt_noiv_block(struct skcipher_request *req);
181 int crypto4xx_decrypt_noiv_block(struct skcipher_request *req);
182 int crypto4xx_rfc3686_encrypt(struct skcipher_request *req);
183 int crypto4xx_rfc3686_decrypt(struct skcipher_request *req);
184 int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm);
185 int crypto4xx_hash_digest(struct ahash_request *req);
186 int crypto4xx_hash_final(struct ahash_request *req);
187 int crypto4xx_hash_update(struct ahash_request *req);
188 int crypto4xx_hash_init(struct ahash_request *req);
189 
190 /**
191  * Note: Only use this function to copy items that is word aligned.
192  */
193 static inline void crypto4xx_memcpy_swab32(u32 *dst, const void *buf,
194 					   size_t len)
195 {
196 	for (; len >= 4; buf += 4, len -= 4)
197 		*dst++ = __swab32p((u32 *) buf);
198 
199 	if (len) {
200 		const u8 *tmp = (u8 *)buf;
201 
202 		switch (len) {
203 		case 3:
204 			*dst = (tmp[2] << 16) |
205 			       (tmp[1] << 8) |
206 			       tmp[0];
207 			break;
208 		case 2:
209 			*dst = (tmp[1] << 8) |
210 			       tmp[0];
211 			break;
212 		case 1:
213 			*dst = tmp[0];
214 			break;
215 		default:
216 			break;
217 		}
218 	}
219 }
220 
221 static inline void crypto4xx_memcpy_from_le32(u32 *dst, const void *buf,
222 					      size_t len)
223 {
224 	crypto4xx_memcpy_swab32(dst, buf, len);
225 }
226 
227 static inline void crypto4xx_memcpy_to_le32(__le32 *dst, const void *buf,
228 					    size_t len)
229 {
230 	crypto4xx_memcpy_swab32((u32 *)dst, buf, len);
231 }
232 
233 int crypto4xx_setauthsize_aead(struct crypto_aead *ciper,
234 			       unsigned int authsize);
235 int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher,
236 			     const u8 *key, unsigned int keylen);
237 int crypto4xx_encrypt_aes_ccm(struct aead_request *req);
238 int crypto4xx_decrypt_aes_ccm(struct aead_request *req);
239 int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher,
240 			     const u8 *key, unsigned int keylen);
241 int crypto4xx_encrypt_aes_gcm(struct aead_request *req);
242 int crypto4xx_decrypt_aes_gcm(struct aead_request *req);
243 
244 #endif
245