tjh.dev
Linux kernel mirror (for testing)
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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#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_LAST_PD 63
34#define PPC4XX_NUM_PD 64
35#define PPC4XX_LAST_GD 1023
36#define PPC4XX_NUM_GD 1024
37#define PPC4XX_LAST_SD 63
38#define PPC4XX_NUM_SD 64
39#define PPC4XX_SD_BUFFER_SIZE 2048
40
41#define PD_ENTRY_INUSE 1
42#define PD_ENTRY_FREE 0
43#define ERING_WAS_FULL 0xffffffff
44
45struct crypto4xx_device;
46
47struct pd_uinfo {
48 struct crypto4xx_device *dev;
49 u32 state;
50 u32 using_sd;
51 u32 first_gd; /* first gather discriptor
52 used by this packet */
53 u32 num_gd; /* number of gather discriptor
54 used by this packet */
55 u32 first_sd; /* first scatter discriptor
56 used by this packet */
57 u32 num_sd; /* number of scatter discriptors
58 used by this packet */
59 void *sa_va; /* shadow sa, when using cp from ctx->sa */
60 u32 sa_pa;
61 void *sr_va; /* state record for shadow sa */
62 u32 sr_pa;
63 struct scatterlist *dest_va;
64 struct crypto_async_request *async_req; /* base crypto request
65 for this packet */
66};
67
68struct crypto4xx_device {
69 struct crypto4xx_core_device *core_dev;
70 char *name;
71 u64 ce_phy_address;
72 void __iomem *ce_base;
73
74 void *pdr; /* base address of packet
75 descriptor ring */
76 dma_addr_t pdr_pa; /* physical address used to
77 program ce pdr_base_register */
78 void *gdr; /* gather descriptor ring */
79 dma_addr_t gdr_pa; /* physical address used to
80 program ce gdr_base_register */
81 void *sdr; /* scatter descriptor ring */
82 dma_addr_t sdr_pa; /* physical address used to
83 program ce sdr_base_register */
84 void *scatter_buffer_va;
85 dma_addr_t scatter_buffer_pa;
86 u32 scatter_buffer_size;
87
88 void *shadow_sa_pool; /* pool of memory for sa in pd_uinfo */
89 dma_addr_t shadow_sa_pool_pa;
90 void *shadow_sr_pool; /* pool of memory for sr in pd_uinfo */
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 void *pdr_uinfo;
99 struct list_head alg_list; /* List of algorithm supported
100 by this device */
101};
102
103struct crypto4xx_core_device {
104 struct device *device;
105 struct of_device *ofdev;
106 struct crypto4xx_device *dev;
107 u32 int_status;
108 u32 irq;
109 struct tasklet_struct tasklet;
110 spinlock_t lock;
111};
112
113struct crypto4xx_ctx {
114 struct crypto4xx_device *dev;
115 void *sa_in;
116 dma_addr_t sa_in_dma_addr;
117 void *sa_out;
118 dma_addr_t sa_out_dma_addr;
119 void *state_record;
120 dma_addr_t state_record_dma_addr;
121 u32 sa_len;
122 u32 offset_to_sr_ptr; /* offset to state ptr, in dynamic sa */
123 u32 direction;
124 u32 next_hdr;
125 u32 save_iv;
126 u32 pd_ctl_len;
127 u32 pd_ctl;
128 u32 bypass;
129 u32 is_hash;
130 u32 hash_final;
131};
132
133struct crypto4xx_req_ctx {
134 struct crypto4xx_device *dev; /* Device in which
135 operation to send to */
136 void *sa;
137 u32 sa_dma_addr;
138 u16 sa_len;
139};
140
141struct crypto4xx_alg {
142 struct list_head entry;
143 struct crypto_alg alg;
144 struct crypto4xx_device *dev;
145};
146
147#define crypto_alg_to_crypto4xx_alg(x) \
148 container_of(x, struct crypto4xx_alg, alg)
149
150extern int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size);
151extern void crypto4xx_free_sa(struct crypto4xx_ctx *ctx);
152extern u32 crypto4xx_alloc_sa_rctx(struct crypto4xx_ctx *ctx,
153 struct crypto4xx_ctx *rctx);
154extern void crypto4xx_free_sa_rctx(struct crypto4xx_ctx *rctx);
155extern void crypto4xx_free_ctx(struct crypto4xx_ctx *ctx);
156extern u32 crypto4xx_alloc_state_record(struct crypto4xx_ctx *ctx);
157extern u32 get_dynamic_sa_offset_state_ptr_field(struct crypto4xx_ctx *ctx);
158extern u32 get_dynamic_sa_offset_key_field(struct crypto4xx_ctx *ctx);
159extern u32 get_dynamic_sa_iv_size(struct crypto4xx_ctx *ctx);
160extern void crypto4xx_memcpy_le(unsigned int *dst,
161 const unsigned char *buf, int len);
162extern u32 crypto4xx_build_pd(struct crypto_async_request *req,
163 struct crypto4xx_ctx *ctx,
164 struct scatterlist *src,
165 struct scatterlist *dst,
166 unsigned int datalen,
167 void *iv, u32 iv_len);
168extern int crypto4xx_setkey_aes_cbc(struct crypto_ablkcipher *cipher,
169 const u8 *key, unsigned int keylen);
170extern int crypto4xx_encrypt(struct ablkcipher_request *req);
171extern int crypto4xx_decrypt(struct ablkcipher_request *req);
172extern int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm);
173extern int crypto4xx_hash_digest(struct ahash_request *req);
174extern int crypto4xx_hash_final(struct ahash_request *req);
175extern int crypto4xx_hash_update(struct ahash_request *req);
176extern int crypto4xx_hash_init(struct ahash_request *req);
177#endif