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 <crypto/internal/hash.h>
26
27 #define PPC460SX_SDR0_SRST 0x201
28 #define PPC405EX_SDR0_SRST 0x200
29 #define PPC460EX_SDR0_SRST 0x201
30 #define PPC460EX_CE_RESET 0x08000000
31 #define PPC460SX_CE_RESET 0x20000000
32 #define PPC405EX_CE_RESET 0x00000008
33
34 #define CRYPTO4XX_CRYPTO_PRIORITY 300
35 #define PPC4XX_LAST_PD 63
36 #define PPC4XX_NUM_PD 64
37 #define PPC4XX_LAST_GD 1023
38 #define PPC4XX_NUM_GD 1024
39 #define PPC4XX_LAST_SD 63
40 #define PPC4XX_NUM_SD 64
41 #define PPC4XX_SD_BUFFER_SIZE 2048
42
43 #define PD_ENTRY_INUSE 1
44 #define PD_ENTRY_FREE 0
45 #define ERING_WAS_FULL 0xffffffff
46
47 struct crypto4xx_device;
48
49 struct pd_uinfo {
50 struct crypto4xx_device *dev;
51 u32 state;
52 u32 using_sd;
53 u32 first_gd; /* first gather discriptor
54 used by this packet */
55 u32 num_gd; /* number of gather discriptor
56 used by this packet */
57 u32 first_sd; /* first scatter discriptor
58 used by this packet */
59 u32 num_sd; /* number of scatter discriptors
60 used by this packet */
61 void *sa_va; /* shadow sa, when using cp from ctx->sa */
62 u32 sa_pa;
63 void *sr_va; /* state record for shadow sa */
64 u32 sr_pa;
65 struct scatterlist *dest_va;
66 struct crypto_async_request *async_req; /* base crypto request
67 for this packet */
68 };
69
70 struct crypto4xx_device {
71 struct crypto4xx_core_device *core_dev;
72 char *name;
73 u64 ce_phy_address;
74 void __iomem *ce_base;
75
76 void *pdr; /* base address of packet
77 descriptor ring */
78 dma_addr_t pdr_pa; /* physical address used to
79 program ce pdr_base_register */
80 void *gdr; /* gather descriptor ring */
81 dma_addr_t gdr_pa; /* physical address used to
82 program ce gdr_base_register */
83 void *sdr; /* scatter descriptor ring */
84 dma_addr_t sdr_pa; /* physical address used to
85 program ce sdr_base_register */
86 void *scatter_buffer_va;
87 dma_addr_t scatter_buffer_pa;
88 u32 scatter_buffer_size;
89
90 void *shadow_sa_pool; /* pool of memory for sa in pd_uinfo */
91 dma_addr_t shadow_sa_pool_pa;
92 void *shadow_sr_pool; /* pool of memory for sr in pd_uinfo */
93 dma_addr_t shadow_sr_pool_pa;
94 u32 pdr_tail;
95 u32 pdr_head;
96 u32 gdr_tail;
97 u32 gdr_head;
98 u32 sdr_tail;
99 u32 sdr_head;
100 void *pdr_uinfo;
101 struct list_head alg_list; /* List of algorithm supported
102 by this device */
103 };
104
105 struct crypto4xx_core_device {
106 struct device *device;
107 struct platform_device *ofdev;
108 struct crypto4xx_device *dev;
109 u32 int_status;
110 u32 irq;
111 struct tasklet_struct tasklet;
112 spinlock_t lock;
113 };
114
115 struct crypto4xx_ctx {
116 struct crypto4xx_device *dev;
117 void *sa_in;
118 dma_addr_t sa_in_dma_addr;
119 void *sa_out;
120 dma_addr_t sa_out_dma_addr;
121 void *state_record;
122 dma_addr_t state_record_dma_addr;
123 u32 sa_len;
124 u32 offset_to_sr_ptr; /* offset to state ptr, in dynamic sa */
125 u32 direction;
126 u32 next_hdr;
127 u32 save_iv;
128 u32 pd_ctl_len;
129 u32 pd_ctl;
130 u32 bypass;
131 u32 is_hash;
132 u32 hash_final;
133 };
134
135 struct crypto4xx_req_ctx {
136 struct crypto4xx_device *dev; /* Device in which
137 operation to send to */
138 void *sa;
139 u32 sa_dma_addr;
140 u16 sa_len;
141 };
142
143 struct crypto4xx_alg_common {
144 u32 type;
145 union {
146 struct crypto_alg cipher;
147 struct ahash_alg hash;
148 } u;
149 };
150
151 struct crypto4xx_alg {
152 struct list_head entry;
153 struct crypto4xx_alg_common alg;
154 struct crypto4xx_device *dev;
155 };
156
crypto_alg_to_crypto4xx_alg(struct crypto_alg * x)157 static inline struct crypto4xx_alg *crypto_alg_to_crypto4xx_alg(
158 struct crypto_alg *x)
159 {
160 switch (x->cra_flags & CRYPTO_ALG_TYPE_MASK) {
161 case CRYPTO_ALG_TYPE_AHASH:
162 return container_of(__crypto_ahash_alg(x),
163 struct crypto4xx_alg, alg.u.hash);
164 }
165
166 return container_of(x, struct crypto4xx_alg, alg.u.cipher);
167 }
168
169 extern int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size);
170 extern void crypto4xx_free_sa(struct crypto4xx_ctx *ctx);
171 extern u32 crypto4xx_alloc_sa_rctx(struct crypto4xx_ctx *ctx,
172 struct crypto4xx_ctx *rctx);
173 extern void crypto4xx_free_sa_rctx(struct crypto4xx_ctx *rctx);
174 extern void crypto4xx_free_ctx(struct crypto4xx_ctx *ctx);
175 extern u32 crypto4xx_alloc_state_record(struct crypto4xx_ctx *ctx);
176 extern u32 get_dynamic_sa_offset_state_ptr_field(struct crypto4xx_ctx *ctx);
177 extern u32 get_dynamic_sa_offset_key_field(struct crypto4xx_ctx *ctx);
178 extern u32 get_dynamic_sa_iv_size(struct crypto4xx_ctx *ctx);
179 extern void crypto4xx_memcpy_le(unsigned int *dst,
180 const unsigned char *buf, int len);
181 extern u32 crypto4xx_build_pd(struct crypto_async_request *req,
182 struct crypto4xx_ctx *ctx,
183 struct scatterlist *src,
184 struct scatterlist *dst,
185 unsigned int datalen,
186 void *iv, u32 iv_len);
187 extern int crypto4xx_setkey_aes_cbc(struct crypto_ablkcipher *cipher,
188 const u8 *key, unsigned int keylen);
189 extern int crypto4xx_encrypt(struct ablkcipher_request *req);
190 extern int crypto4xx_decrypt(struct ablkcipher_request *req);
191 extern int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm);
192 extern int crypto4xx_hash_digest(struct ahash_request *req);
193 extern int crypto4xx_hash_final(struct ahash_request *req);
194 extern int crypto4xx_hash_update(struct ahash_request *req);
195 extern int crypto4xx_hash_init(struct ahash_request *req);
196 #endif
197