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 <linux/scatterlist.h>
19 #include <crypto/internal/hash.h>
20 #include <crypto/internal/aead.h>
21 #include <crypto/internal/rng.h>
22 #include <crypto/internal/skcipher.h>
23 #include "crypto4xx_reg_def.h"
24 #include "crypto4xx_sa.h"
25 
26 #define PPC460SX_SDR0_SRST                      0x201
27 #define PPC405EX_SDR0_SRST                      0x200
28 #define PPC460EX_SDR0_SRST                      0x201
29 #define PPC460EX_CE_RESET                       0x08000000
30 #define PPC460SX_CE_RESET                       0x20000000
31 #define PPC405EX_CE_RESET                       0x00000008
32 
33 #define CRYPTO4XX_CRYPTO_PRIORITY		300
34 #define PPC4XX_NUM_PD				256
35 #define PPC4XX_LAST_PD				(PPC4XX_NUM_PD - 1)
36 #define PPC4XX_NUM_GD				1024
37 #define PPC4XX_LAST_GD				(PPC4XX_NUM_GD - 1)
38 #define PPC4XX_NUM_SD				256
39 #define PPC4XX_LAST_SD				(PPC4XX_NUM_SD - 1)
40 #define PPC4XX_SD_BUFFER_SIZE			2048
41 
42 #define PD_ENTRY_BUSY				BIT(1)
43 #define PD_ENTRY_INUSE				BIT(0)
44 #define PD_ENTRY_FREE				0
45 #define ERING_WAS_FULL				0xffffffff
46 
47 struct crypto4xx_device;
48 
49 union shadow_sa_buf {
50 	struct dynamic_sa_ctl sa;
51 
52 	/* alloc 256 bytes which is enough for any kind of dynamic sa */
53 	u8 buf[256];
54 } __packed;
55 
56 struct pd_uinfo {
57 	struct crypto4xx_device *dev;
58 	u32   state;
59 	u32 first_gd;		/* first gather discriptor
60 				used by this packet */
61 	u32 num_gd;             /* number of gather discriptor
62 				used by this packet */
63 	u32 first_sd;		/* first scatter discriptor
64 				used by this packet */
65 	u32 num_sd;		/* number of scatter discriptors
66 				used by this packet */
67 	struct dynamic_sa_ctl *sa_va;	/* shadow sa */
68 	struct sa_state_record *sr_va;	/* state record for shadow sa */
69 	u32 sr_pa;
70 	struct scatterlist *dest_va;
71 	struct crypto_async_request *async_req; 	/* base crypto request
72 							for this packet */
73 };
74 
75 struct crypto4xx_device {
76 	struct crypto4xx_core_device *core_dev;
77 	void __iomem *ce_base;
78 	void __iomem *trng_base;
79 
80 	struct ce_pd *pdr;	/* base address of packet descriptor ring */
81 	dma_addr_t pdr_pa;	/* physical address of pdr_base_register */
82 	struct ce_gd *gdr;	/* gather descriptor ring */
83 	dma_addr_t gdr_pa;	/* physical address of gdr_base_register */
84 	struct ce_sd *sdr;	/* scatter descriptor ring */
85 	dma_addr_t sdr_pa;	/* physical address of sdr_base_register */
86 	void *scatter_buffer_va;
87 	dma_addr_t scatter_buffer_pa;
88 
89 	union shadow_sa_buf *shadow_sa_pool;
90 	dma_addr_t shadow_sa_pool_pa;
91 	struct sa_state_record *shadow_sr_pool;
92 	dma_addr_t shadow_sr_pool_pa;
93 	u32 pdr_tail;
94 	u32 pdr_head;
95 	u32 gdr_tail;
96 	u32 gdr_head;
97 	u32 sdr_tail;
98 	u32 sdr_head;
99 	struct pd_uinfo *pdr_uinfo;
100 	struct list_head alg_list;	/* List of algorithm supported
101 					by this device */
102 	struct ratelimit_state aead_ratelimit;
103 	bool is_revb;
104 };
105 
106 struct crypto4xx_core_device {
107 	struct device *device;
108 	struct platform_device *ofdev;
109 	struct crypto4xx_device *dev;
110 	struct hwrng *trng;
111 	u32 int_status;
112 	u32 irq;
113 	struct tasklet_struct tasklet;
114 	spinlock_t lock;
115 	struct mutex rng_lock;
116 };
117 
118 struct crypto4xx_ctx {
119 	struct crypto4xx_device *dev;
120 	struct dynamic_sa_ctl *sa_in;
121 	struct dynamic_sa_ctl *sa_out;
122 	__le32 iv_nonce;
123 	u32 sa_len;
124 	union {
125 		struct crypto_sync_skcipher *cipher;
126 		struct crypto_aead *aead;
127 	} sw_cipher;
128 };
129 
130 struct crypto4xx_aead_reqctx {
131 	struct scatterlist dst[2];
132 };
133 
134 struct crypto4xx_alg_common {
135 	u32 type;
136 	union {
137 		struct skcipher_alg cipher;
138 		struct ahash_alg hash;
139 		struct aead_alg aead;
140 		struct rng_alg rng;
141 	} u;
142 };
143 
144 struct crypto4xx_alg {
145 	struct list_head  entry;
146 	struct crypto4xx_alg_common alg;
147 	struct crypto4xx_device *dev;
148 };
149 
150 int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size);
151 void crypto4xx_free_sa(struct crypto4xx_ctx *ctx);
152 void crypto4xx_free_ctx(struct crypto4xx_ctx *ctx);
153 int crypto4xx_build_pd(struct crypto_async_request *req,
154 		       struct crypto4xx_ctx *ctx,
155 		       struct scatterlist *src,
156 		       struct scatterlist *dst,
157 		       const unsigned int datalen,
158 		       const __le32 *iv, const u32 iv_len,
159 		       const struct dynamic_sa_ctl *sa,
160 		       const unsigned int sa_len,
161 		       const unsigned int assoclen,
162 		       struct scatterlist *dst_tmp);
163 int crypto4xx_setkey_aes_cbc(struct crypto_skcipher *cipher,
164 			     const u8 *key, unsigned int keylen);
165 int crypto4xx_setkey_aes_cfb(struct crypto_skcipher *cipher,
166 			     const u8 *key, unsigned int keylen);
167 int crypto4xx_setkey_aes_ctr(struct crypto_skcipher *cipher,
168 			     const u8 *key, unsigned int keylen);
169 int crypto4xx_setkey_aes_ecb(struct crypto_skcipher *cipher,
170 			     const u8 *key, unsigned int keylen);
171 int crypto4xx_setkey_aes_ofb(struct crypto_skcipher *cipher,
172 			     const u8 *key, unsigned int keylen);
173 int crypto4xx_setkey_rfc3686(struct crypto_skcipher *cipher,
174 			     const u8 *key, unsigned int keylen);
175 int crypto4xx_encrypt_ctr(struct skcipher_request *req);
176 int crypto4xx_decrypt_ctr(struct skcipher_request *req);
177 int crypto4xx_encrypt_iv_stream(struct skcipher_request *req);
178 int crypto4xx_decrypt_iv_stream(struct skcipher_request *req);
179 int crypto4xx_encrypt_iv_block(struct skcipher_request *req);
180 int crypto4xx_decrypt_iv_block(struct skcipher_request *req);
181 int crypto4xx_encrypt_noiv_block(struct skcipher_request *req);
182 int crypto4xx_decrypt_noiv_block(struct skcipher_request *req);
183 int crypto4xx_rfc3686_encrypt(struct skcipher_request *req);
184 int crypto4xx_rfc3686_decrypt(struct skcipher_request *req);
185 int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm);
186 int crypto4xx_hash_digest(struct ahash_request *req);
187 int crypto4xx_hash_final(struct ahash_request *req);
188 int crypto4xx_hash_update(struct ahash_request *req);
189 int crypto4xx_hash_init(struct ahash_request *req);
190 
191 /*
192  * Note: Only use this function to copy items that is word aligned.
193  */
194 static inline void crypto4xx_memcpy_swab32(u32 *dst, const void *buf,
195 					   size_t len)
196 {
197 	for (; len >= 4; buf += 4, len -= 4)
198 		*dst++ = __swab32p((u32 *) buf);
199 
200 	if (len) {
201 		const u8 *tmp = (u8 *)buf;
202 
203 		switch (len) {
204 		case 3:
205 			*dst = (tmp[2] << 16) |
206 			       (tmp[1] << 8) |
207 			       tmp[0];
208 			break;
209 		case 2:
210 			*dst = (tmp[1] << 8) |
211 			       tmp[0];
212 			break;
213 		case 1:
214 			*dst = tmp[0];
215 			break;
216 		default:
217 			break;
218 		}
219 	}
220 }
221 
222 static inline void crypto4xx_memcpy_from_le32(u32 *dst, const void *buf,
223 					      size_t len)
224 {
225 	crypto4xx_memcpy_swab32(dst, buf, len);
226 }
227 
228 static inline void crypto4xx_memcpy_to_le32(__le32 *dst, const void *buf,
229 					    size_t len)
230 {
231 	crypto4xx_memcpy_swab32((u32 *)dst, buf, len);
232 }
233 
234 int crypto4xx_setauthsize_aead(struct crypto_aead *ciper,
235 			       unsigned int authsize);
236 int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher,
237 			     const u8 *key, unsigned int keylen);
238 int crypto4xx_encrypt_aes_ccm(struct aead_request *req);
239 int crypto4xx_decrypt_aes_ccm(struct aead_request *req);
240 int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher,
241 			     const u8 *key, unsigned int keylen);
242 int crypto4xx_encrypt_aes_gcm(struct aead_request *req);
243 int crypto4xx_decrypt_aes_gcm(struct aead_request *req);
244 
245 #endif
246