tjh.dev
Linux kernel mirror (for testing)
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linux
1/**
2 * AMCC SoC PPC4xx Crypto Driver
3 *
4 * Copyright (c) 2008 Applied Micro Circuits Corporation.
5 * All rights reserved. James Hsiao <jhsiao@amcc.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * This is the header file for AMCC Crypto offload Linux device driver for
18 * use with Linux CryptoAPI.
19
20 */
21
22#ifndef __CRYPTO4XX_CORE_H__
23#define __CRYPTO4XX_CORE_H__
24
25#include <linux/ratelimit.h>
26#include <crypto/internal/hash.h>
27#include <crypto/internal/aead.h>
28#include "crypto4xx_reg_def.h"
29#include "crypto4xx_sa.h"
30
31#define PPC460SX_SDR0_SRST 0x201
32#define PPC405EX_SDR0_SRST 0x200
33#define PPC460EX_SDR0_SRST 0x201
34#define PPC460EX_CE_RESET 0x08000000
35#define PPC460SX_CE_RESET 0x20000000
36#define PPC405EX_CE_RESET 0x00000008
37
38#define CRYPTO4XX_CRYPTO_PRIORITY 300
39#define PPC4XX_NUM_PD 256
40#define PPC4XX_LAST_PD (PPC4XX_NUM_PD - 1)
41#define PPC4XX_NUM_GD 1024
42#define PPC4XX_LAST_GD (PPC4XX_NUM_GD - 1)
43#define PPC4XX_NUM_SD 256
44#define PPC4XX_LAST_SD (PPC4XX_NUM_SD - 1)
45#define PPC4XX_SD_BUFFER_SIZE 2048
46
47#define PD_ENTRY_BUSY BIT(1)
48#define PD_ENTRY_INUSE BIT(0)
49#define PD_ENTRY_FREE 0
50#define ERING_WAS_FULL 0xffffffff
51
52struct crypto4xx_device;
53
54union shadow_sa_buf {
55 struct dynamic_sa_ctl sa;
56
57 /* alloc 256 bytes which is enough for any kind of dynamic sa */
58 u8 buf[256];
59} __packed;
60
61struct pd_uinfo {
62 struct crypto4xx_device *dev;
63 u32 state;
64 u32 using_sd;
65 u32 first_gd; /* first gather discriptor
66 used by this packet */
67 u32 num_gd; /* number of gather discriptor
68 used by this packet */
69 u32 first_sd; /* first scatter discriptor
70 used by this packet */
71 u32 num_sd; /* number of scatter discriptors
72 used by this packet */
73 struct dynamic_sa_ctl *sa_va; /* shadow sa */
74 struct sa_state_record *sr_va; /* state record for shadow sa */
75 u32 sr_pa;
76 struct scatterlist *dest_va;
77 struct crypto_async_request *async_req; /* base crypto request
78 for this packet */
79};
80
81struct crypto4xx_device {
82 struct crypto4xx_core_device *core_dev;
83 void __iomem *ce_base;
84 void __iomem *trng_base;
85
86 struct ce_pd *pdr; /* base address of packet descriptor ring */
87 dma_addr_t pdr_pa; /* physical address of pdr_base_register */
88 struct ce_gd *gdr; /* gather descriptor ring */
89 dma_addr_t gdr_pa; /* physical address of gdr_base_register */
90 struct ce_sd *sdr; /* scatter descriptor ring */
91 dma_addr_t sdr_pa; /* physical address of sdr_base_register */
92 void *scatter_buffer_va;
93 dma_addr_t scatter_buffer_pa;
94
95 union shadow_sa_buf *shadow_sa_pool;
96 dma_addr_t shadow_sa_pool_pa;
97 struct sa_state_record *shadow_sr_pool;
98 dma_addr_t shadow_sr_pool_pa;
99 u32 pdr_tail;
100 u32 pdr_head;
101 u32 gdr_tail;
102 u32 gdr_head;
103 u32 sdr_tail;
104 u32 sdr_head;
105 struct pd_uinfo *pdr_uinfo;
106 struct list_head alg_list; /* List of algorithm supported
107 by this device */
108 struct ratelimit_state aead_ratelimit;
109 bool is_revb;
110};
111
112struct crypto4xx_core_device {
113 struct device *device;
114 struct platform_device *ofdev;
115 struct crypto4xx_device *dev;
116 struct hwrng *trng;
117 u32 int_status;
118 u32 irq;
119 struct tasklet_struct tasklet;
120 spinlock_t lock;
121};
122
123struct crypto4xx_ctx {
124 struct crypto4xx_device *dev;
125 struct dynamic_sa_ctl *sa_in;
126 struct dynamic_sa_ctl *sa_out;
127 __le32 iv_nonce;
128 u32 sa_len;
129 union {
130 struct crypto_aead *aead;
131 } sw_cipher;
132};
133
134struct crypto4xx_alg_common {
135 u32 type;
136 union {
137 struct crypto_alg cipher;
138 struct ahash_alg hash;
139 struct aead_alg aead;
140 } u;
141};
142
143struct crypto4xx_alg {
144 struct list_head entry;
145 struct crypto4xx_alg_common alg;
146 struct crypto4xx_device *dev;
147};
148
149int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size);
150void crypto4xx_free_sa(struct crypto4xx_ctx *ctx);
151void crypto4xx_free_ctx(struct crypto4xx_ctx *ctx);
152int 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);
161int crypto4xx_setkey_aes_cbc(struct crypto_ablkcipher *cipher,
162 const u8 *key, unsigned int keylen);
163int crypto4xx_setkey_aes_cfb(struct crypto_ablkcipher *cipher,
164 const u8 *key, unsigned int keylen);
165int crypto4xx_setkey_aes_ecb(struct crypto_ablkcipher *cipher,
166 const u8 *key, unsigned int keylen);
167int crypto4xx_setkey_aes_ofb(struct crypto_ablkcipher *cipher,
168 const u8 *key, unsigned int keylen);
169int crypto4xx_setkey_rfc3686(struct crypto_ablkcipher *cipher,
170 const u8 *key, unsigned int keylen);
171int crypto4xx_encrypt(struct ablkcipher_request *req);
172int crypto4xx_decrypt(struct ablkcipher_request *req);
173int crypto4xx_rfc3686_encrypt(struct ablkcipher_request *req);
174int crypto4xx_rfc3686_decrypt(struct ablkcipher_request *req);
175int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm);
176int crypto4xx_hash_digest(struct ahash_request *req);
177int crypto4xx_hash_final(struct ahash_request *req);
178int crypto4xx_hash_update(struct ahash_request *req);
179int crypto4xx_hash_init(struct ahash_request *req);
180
181/**
182 * Note: Only use this function to copy items that is word aligned.
183 */
184static inline void crypto4xx_memcpy_swab32(u32 *dst, const void *buf,
185 size_t len)
186{
187 for (; len >= 4; buf += 4, len -= 4)
188 *dst++ = __swab32p((u32 *) buf);
189
190 if (len) {
191 const u8 *tmp = (u8 *)buf;
192
193 switch (len) {
194 case 3:
195 *dst = (tmp[2] << 16) |
196 (tmp[1] << 8) |
197 tmp[0];
198 break;
199 case 2:
200 *dst = (tmp[1] << 8) |
201 tmp[0];
202 break;
203 case 1:
204 *dst = tmp[0];
205 break;
206 default:
207 break;
208 }
209 }
210}
211
212static inline void crypto4xx_memcpy_from_le32(u32 *dst, const void *buf,
213 size_t len)
214{
215 crypto4xx_memcpy_swab32(dst, buf, len);
216}
217
218static inline void crypto4xx_memcpy_to_le32(__le32 *dst, const void *buf,
219 size_t len)
220{
221 crypto4xx_memcpy_swab32((u32 *)dst, buf, len);
222}
223
224int crypto4xx_setauthsize_aead(struct crypto_aead *ciper,
225 unsigned int authsize);
226int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher,
227 const u8 *key, unsigned int keylen);
228int crypto4xx_encrypt_aes_ccm(struct aead_request *req);
229int crypto4xx_decrypt_aes_ccm(struct aead_request *req);
230int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher,
231 const u8 *key, unsigned int keylen);
232int crypto4xx_encrypt_aes_gcm(struct aead_request *req);
233int crypto4xx_decrypt_aes_gcm(struct aead_request *req);
234
235#endif