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
47struct crypto4xx_device;
48
49struct 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
70struct 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
105struct 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
115struct 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
135struct 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
143struct crypto4xx_alg_common {
144	u32 type;
145	union {
146		struct crypto_alg cipher;
147		struct ahash_alg hash;
148	} u;
149};
150
151struct crypto4xx_alg {
152	struct list_head  entry;
153	struct crypto4xx_alg_common alg;
154	struct crypto4xx_device *dev;
155};
156
157static 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
169extern int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size);
170extern void crypto4xx_free_sa(struct crypto4xx_ctx *ctx);
171extern u32 crypto4xx_alloc_sa_rctx(struct crypto4xx_ctx *ctx,
172				   struct crypto4xx_ctx *rctx);
173extern void crypto4xx_free_sa_rctx(struct crypto4xx_ctx *rctx);
174extern void crypto4xx_free_ctx(struct crypto4xx_ctx *ctx);
175extern u32 crypto4xx_alloc_state_record(struct crypto4xx_ctx *ctx);
176extern u32 get_dynamic_sa_offset_state_ptr_field(struct crypto4xx_ctx *ctx);
177extern u32 get_dynamic_sa_offset_key_field(struct crypto4xx_ctx *ctx);
178extern u32 get_dynamic_sa_iv_size(struct crypto4xx_ctx *ctx);
179extern void crypto4xx_memcpy_le(unsigned int *dst,
180				const unsigned char *buf, int len);
181extern 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);
187extern int crypto4xx_setkey_aes_cbc(struct crypto_ablkcipher *cipher,
188				    const u8 *key, unsigned int keylen);
189extern int crypto4xx_encrypt(struct ablkcipher_request *req);
190extern int crypto4xx_decrypt(struct ablkcipher_request *req);
191extern int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm);
192extern int crypto4xx_hash_digest(struct ahash_request *req);
193extern int crypto4xx_hash_final(struct ahash_request *req);
194extern int crypto4xx_hash_update(struct ahash_request *req);
195extern int crypto4xx_hash_init(struct ahash_request *req);
196#endif
197