drivers/crypto/amcc/crypto4xx_core.h - linux-mtk - Git at Google

 /**
  * AMCC SoC PPC4xx Crypto Driver
  *
  * Copyright (c) 2008 Applied Micro Circuits Corporation.
  * All rights reserved. James Hsiao <jhsiao@amcc.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * This is the header file for AMCC Crypto offload Linux device driver for
  * use with Linux CryptoAPI.

  */

 #ifndef __CRYPTO4XX_CORE_H__
 #define __CRYPTO4XX_CORE_H__

 #include <linux/ratelimit.h>
 #include <crypto/internal/hash.h>
 #include <crypto/internal/aead.h>
 #include <crypto/internal/skcipher.h>
 #include "crypto4xx_reg_def.h"
 #include "crypto4xx_sa.h"

 #define PPC460SX_SDR0_SRST                      0x201
 #define PPC405EX_SDR0_SRST                      0x200
 #define PPC460EX_SDR0_SRST                      0x201
 #define PPC460EX_CE_RESET                       0x08000000
 #define PPC460SX_CE_RESET                       0x20000000
 #define PPC405EX_CE_RESET                       0x00000008

 #define CRYPTO4XX_CRYPTO_PRIORITY		300
 #define PPC4XX_NUM_PD				256
 #define PPC4XX_LAST_PD				(PPC4XX_NUM_PD - 1)
 #define PPC4XX_NUM_GD				1024
 #define PPC4XX_LAST_GD				(PPC4XX_NUM_GD - 1)
 #define PPC4XX_NUM_SD				256
 #define PPC4XX_LAST_SD				(PPC4XX_NUM_SD - 1)
 #define PPC4XX_SD_BUFFER_SIZE			2048

 #define PD_ENTRY_BUSY				BIT(1)
 #define PD_ENTRY_INUSE				BIT(0)
 #define PD_ENTRY_FREE				0
 #define ERING_WAS_FULL				0xffffffff

 struct crypto4xx_device;

 union shadow_sa_buf {
 	struct dynamic_sa_ctl sa;

 	/* alloc 256 bytes which is enough for any kind of dynamic sa */
 	u8 buf[256];
 } __packed;

 struct pd_uinfo {
 	struct crypto4xx_device *dev;
 	u32   state;
 	u32 using_sd;
 	u32 first_gd;		/* first gather discriptor
 				used by this packet */
 	u32 num_gd;             /* number of gather discriptor
 				used by this packet */
 	u32 first_sd;		/* first scatter discriptor
 				used by this packet */
 	u32 num_sd;		/* number of scatter discriptors
 				used by this packet */
 	struct dynamic_sa_ctl *sa_va;	/* shadow sa */
 	struct sa_state_record *sr_va;	/* state record for shadow sa */
 	u32 sr_pa;
 	struct scatterlist *dest_va;
 	struct crypto_async_request *async_req; 	/* base crypto request
 							for this packet */
 };

 struct crypto4xx_device {
 	struct crypto4xx_core_device *core_dev;
 	void __iomem *ce_base;
 	void __iomem *trng_base;

 	struct ce_pd *pdr;	/* base address of packet descriptor ring */
 	dma_addr_t pdr_pa;	/* physical address of pdr_base_register */
 	struct ce_gd *gdr;	/* gather descriptor ring */
 	dma_addr_t gdr_pa;	/* physical address of gdr_base_register */
 	struct ce_sd *sdr;	/* scatter descriptor ring */
 	dma_addr_t sdr_pa;	/* physical address of sdr_base_register */
 	void *scatter_buffer_va;
 	dma_addr_t scatter_buffer_pa;

 	union shadow_sa_buf *shadow_sa_pool;
 	dma_addr_t shadow_sa_pool_pa;
 	struct sa_state_record *shadow_sr_pool;
 	dma_addr_t shadow_sr_pool_pa;
 	u32 pdr_tail;
 	u32 pdr_head;
 	u32 gdr_tail;
 	u32 gdr_head;
 	u32 sdr_tail;
 	u32 sdr_head;
 	struct pd_uinfo *pdr_uinfo;
 	struct list_head alg_list;	/* List of algorithm supported
 					by this device */
 	struct ratelimit_state aead_ratelimit;
 	bool is_revb;
 };

 struct crypto4xx_core_device {
 	struct device *device;
 	struct platform_device *ofdev;
 	struct crypto4xx_device *dev;
 	struct hwrng *trng;
 	u32 int_status;
 	u32 irq;
 	struct tasklet_struct tasklet;
 	spinlock_t lock;
 };

 struct crypto4xx_ctx {
 	struct crypto4xx_device *dev;
 	struct dynamic_sa_ctl *sa_in;
 	struct dynamic_sa_ctl *sa_out;
 	__le32 iv_nonce;
 	u32 sa_len;
 	union {
 		struct crypto_skcipher *cipher;
 		struct crypto_aead *aead;
 	} sw_cipher;
 };

 struct crypto4xx_aead_reqctx {
 	struct scatterlist dst[2];
 };

 struct crypto4xx_alg_common {
 	u32 type;
 	union {
 		struct skcipher_alg cipher;
 		struct ahash_alg hash;
 		struct aead_alg aead;
 	} u;
 };

 struct crypto4xx_alg {
 	struct list_head  entry;
 	struct crypto4xx_alg_common alg;
 	struct crypto4xx_device *dev;
 };

 int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size);
 void crypto4xx_free_sa(struct crypto4xx_ctx *ctx);
 void crypto4xx_free_ctx(struct crypto4xx_ctx *ctx);
 int crypto4xx_build_pd(struct crypto_async_request *req,
 		       struct crypto4xx_ctx *ctx,
 		       struct scatterlist *src,
 		       struct scatterlist *dst,
 		       const unsigned int datalen,
 		       const __le32 *iv, const u32 iv_len,
 		       const struct dynamic_sa_ctl *sa,
 		       const unsigned int sa_len,
 		       const unsigned int assoclen,
 		       struct scatterlist *dst_tmp);
 int crypto4xx_setkey_aes_cbc(struct crypto_skcipher *cipher,
 			     const u8 *key, unsigned int keylen);
 int crypto4xx_setkey_aes_cfb(struct crypto_skcipher *cipher,
 			     const u8 *key, unsigned int keylen);
 int crypto4xx_setkey_aes_ctr(struct crypto_skcipher *cipher,
 			     const u8 *key, unsigned int keylen);
 int crypto4xx_setkey_aes_ecb(struct crypto_skcipher *cipher,
 			     const u8 *key, unsigned int keylen);
 int crypto4xx_setkey_aes_ofb(struct crypto_skcipher *cipher,
 			     const u8 *key, unsigned int keylen);
 int crypto4xx_setkey_rfc3686(struct crypto_skcipher *cipher,
 			     const u8 *key, unsigned int keylen);
 int crypto4xx_encrypt_ctr(struct skcipher_request *req);
 int crypto4xx_decrypt_ctr(struct skcipher_request *req);
 int crypto4xx_encrypt_iv_stream(struct skcipher_request *req);
 int crypto4xx_decrypt_iv_stream(struct skcipher_request *req);
 int crypto4xx_encrypt_iv_block(struct skcipher_request *req);
 int crypto4xx_decrypt_iv_block(struct skcipher_request *req);
 int crypto4xx_encrypt_noiv_block(struct skcipher_request *req);
 int crypto4xx_decrypt_noiv_block(struct skcipher_request *req);
 int crypto4xx_rfc3686_encrypt(struct skcipher_request *req);
 int crypto4xx_rfc3686_decrypt(struct skcipher_request *req);
 int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm);
 int crypto4xx_hash_digest(struct ahash_request *req);
 int crypto4xx_hash_final(struct ahash_request *req);
 int crypto4xx_hash_update(struct ahash_request *req);
 int crypto4xx_hash_init(struct ahash_request *req);

 /**
  * Note: Only use this function to copy items that is word aligned.
  */
 static inline void crypto4xx_memcpy_swab32(u32 *dst, const void *buf,
 					   size_t len)
 {
 	for (; len >= 4; buf += 4, len -= 4)
 		*dst++ = __swab32p((u32 *) buf);

 	if (len) {
 		const u8 *tmp = (u8 *)buf;

 		switch (len) {
 		case 3:
 			*dst = (tmp[2] << 16) |
 			       (tmp[1] << 8) |
 			       tmp[0];
 			break;
 		case 2:
 			*dst = (tmp[1] << 8) |
 			       tmp[0];
 			break;
 		case 1:
 			*dst = tmp[0];
 			break;
 		default:
 			break;
 		}
 	}
 }

 static inline void crypto4xx_memcpy_from_le32(u32 *dst, const void *buf,
 					      size_t len)
 {
 	crypto4xx_memcpy_swab32(dst, buf, len);
 }

 static inline void crypto4xx_memcpy_to_le32(__le32 *dst, const void *buf,
 					    size_t len)
 {
 	crypto4xx_memcpy_swab32((u32 *)dst, buf, len);
 }

 int crypto4xx_setauthsize_aead(struct crypto_aead *ciper,
 			       unsigned int authsize);
 int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher,
 			     const u8 *key, unsigned int keylen);
 int crypto4xx_encrypt_aes_ccm(struct aead_request *req);
 int crypto4xx_decrypt_aes_ccm(struct aead_request *req);
 int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher,
 			     const u8 *key, unsigned int keylen);
 int crypto4xx_encrypt_aes_gcm(struct aead_request *req);
 int crypto4xx_decrypt_aes_gcm(struct aead_request *req);

 #endif
	/**
	* AMCC SoC PPC4xx Crypto Driver
	*
	* Copyright (c) 2008 Applied Micro Circuits Corporation.
	* All rights reserved. James Hsiao <jhsiao@amcc.com>
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* This is the header file for AMCC Crypto offload Linux device driver for
	* use with Linux CryptoAPI.

	*/

	#ifndef __CRYPTO4XX_CORE_H__
	#define __CRYPTO4XX_CORE_H__

	#include <linux/ratelimit.h>
	#include <crypto/internal/hash.h>
	#include <crypto/internal/aead.h>
	#include <crypto/internal/skcipher.h>
	#include "crypto4xx_reg_def.h"
	#include "crypto4xx_sa.h"

	#define PPC460SX_SDR0_SRST 0x201
	#define PPC405EX_SDR0_SRST 0x200
	#define PPC460EX_SDR0_SRST 0x201
	#define PPC460EX_CE_RESET 0x08000000
	#define PPC460SX_CE_RESET 0x20000000
	#define PPC405EX_CE_RESET 0x00000008

	#define CRYPTO4XX_CRYPTO_PRIORITY 300
	#define PPC4XX_NUM_PD 256
	#define PPC4XX_LAST_PD (PPC4XX_NUM_PD - 1)
	#define PPC4XX_NUM_GD 1024
	#define PPC4XX_LAST_GD (PPC4XX_NUM_GD - 1)
	#define PPC4XX_NUM_SD 256
	#define PPC4XX_LAST_SD (PPC4XX_NUM_SD - 1)
	#define PPC4XX_SD_BUFFER_SIZE 2048

	#define PD_ENTRY_BUSY BIT(1)
	#define PD_ENTRY_INUSE BIT(0)
	#define PD_ENTRY_FREE 0
	#define ERING_WAS_FULL 0xffffffff

	struct crypto4xx_device;

	union shadow_sa_buf {
	struct dynamic_sa_ctl sa;

	/* alloc 256 bytes which is enough for any kind of dynamic sa */
	u8 buf[256];
	} __packed;

	struct pd_uinfo {
	struct crypto4xx_device *dev;
	u32 state;
	u32 using_sd;
	u32 first_gd; /* first gather discriptor
	used by this packet */
	u32 num_gd; /* number of gather discriptor
	used by this packet */
	u32 first_sd; /* first scatter discriptor
	used by this packet */
	u32 num_sd; /* number of scatter discriptors
	used by this packet */
	struct dynamic_sa_ctl sa_va; / shadow sa */
	struct sa_state_record sr_va; / state record for shadow sa */
	u32 sr_pa;
	struct scatterlist *dest_va;
	struct crypto_async_request async_req; / base crypto request
	for this packet */
	};

	struct crypto4xx_device {
	struct crypto4xx_core_device *core_dev;
	void __iomem *ce_base;
	void __iomem *trng_base;

	struct ce_pd pdr; / base address of packet descriptor ring */
	dma_addr_t pdr_pa; /* physical address of pdr_base_register */
	struct ce_gd gdr; / gather descriptor ring */
	dma_addr_t gdr_pa; /* physical address of gdr_base_register */
	struct ce_sd sdr; / scatter descriptor ring */
	dma_addr_t sdr_pa; /* physical address of sdr_base_register */
	void *scatter_buffer_va;
	dma_addr_t scatter_buffer_pa;

	union shadow_sa_buf *shadow_sa_pool;
	dma_addr_t shadow_sa_pool_pa;
	struct sa_state_record *shadow_sr_pool;
	dma_addr_t shadow_sr_pool_pa;
	u32 pdr_tail;
	u32 pdr_head;
	u32 gdr_tail;
	u32 gdr_head;
	u32 sdr_tail;
	u32 sdr_head;
	struct pd_uinfo *pdr_uinfo;
	struct list_head alg_list; /* List of algorithm supported
	by this device */
	struct ratelimit_state aead_ratelimit;
	bool is_revb;
	};

	struct crypto4xx_core_device {
	struct device *device;
	struct platform_device *ofdev;
	struct crypto4xx_device *dev;
	struct hwrng *trng;
	u32 int_status;
	u32 irq;
	struct tasklet_struct tasklet;
	spinlock_t lock;
	};

	struct crypto4xx_ctx {
	struct crypto4xx_device *dev;
	struct dynamic_sa_ctl *sa_in;
	struct dynamic_sa_ctl *sa_out;
	__le32 iv_nonce;
	u32 sa_len;
	union {
	struct crypto_skcipher *cipher;
	struct crypto_aead *aead;
	} sw_cipher;
	};

	struct crypto4xx_aead_reqctx {
	struct scatterlist dst[2];
	};

	struct crypto4xx_alg_common {
	u32 type;
	union {
	struct skcipher_alg cipher;
	struct ahash_alg hash;
	struct aead_alg aead;
	} u;
	};

	struct crypto4xx_alg {
	struct list_head entry;
	struct crypto4xx_alg_common alg;
	struct crypto4xx_device *dev;
	};

	int crypto4xx_alloc_sa(struct crypto4xx_ctx *ctx, u32 size);
	void crypto4xx_free_sa(struct crypto4xx_ctx *ctx);
	void crypto4xx_free_ctx(struct crypto4xx_ctx *ctx);
	int crypto4xx_build_pd(struct crypto_async_request *req,
	struct crypto4xx_ctx *ctx,
	struct scatterlist *src,
	struct scatterlist *dst,
	const unsigned int datalen,
	const __le32 *iv, const u32 iv_len,
	const struct dynamic_sa_ctl *sa,
	const unsigned int sa_len,
	const unsigned int assoclen,
	struct scatterlist *dst_tmp);
	int crypto4xx_setkey_aes_cbc(struct crypto_skcipher *cipher,
	const u8 *key, unsigned int keylen);
	int crypto4xx_setkey_aes_cfb(struct crypto_skcipher *cipher,
	const u8 *key, unsigned int keylen);
	int crypto4xx_setkey_aes_ctr(struct crypto_skcipher *cipher,
	const u8 *key, unsigned int keylen);
	int crypto4xx_setkey_aes_ecb(struct crypto_skcipher *cipher,
	const u8 *key, unsigned int keylen);
	int crypto4xx_setkey_aes_ofb(struct crypto_skcipher *cipher,
	const u8 *key, unsigned int keylen);
	int crypto4xx_setkey_rfc3686(struct crypto_skcipher *cipher,
	const u8 *key, unsigned int keylen);
	int crypto4xx_encrypt_ctr(struct skcipher_request *req);
	int crypto4xx_decrypt_ctr(struct skcipher_request *req);
	int crypto4xx_encrypt_iv_stream(struct skcipher_request *req);
	int crypto4xx_decrypt_iv_stream(struct skcipher_request *req);
	int crypto4xx_encrypt_iv_block(struct skcipher_request *req);
	int crypto4xx_decrypt_iv_block(struct skcipher_request *req);
	int crypto4xx_encrypt_noiv_block(struct skcipher_request *req);
	int crypto4xx_decrypt_noiv_block(struct skcipher_request *req);
	int crypto4xx_rfc3686_encrypt(struct skcipher_request *req);
	int crypto4xx_rfc3686_decrypt(struct skcipher_request *req);
	int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm);
	int crypto4xx_hash_digest(struct ahash_request *req);
	int crypto4xx_hash_final(struct ahash_request *req);
	int crypto4xx_hash_update(struct ahash_request *req);
	int crypto4xx_hash_init(struct ahash_request *req);

	/**
	* Note: Only use this function to copy items that is word aligned.
	*/
	static inline void crypto4xx_memcpy_swab32(u32 dst, const void buf,
	size_t len)
	{
	for (; len >= 4; buf += 4, len -= 4)
	dst++ = __swab32p((u32 ) buf);

	if (len) {
	const u8 tmp = (u8 )buf;

	switch (len) {
	case 3:
	*dst = (tmp[2] << 16) \|
	(tmp[1] << 8) \|
	tmp[0];
	break;
	case 2:
	*dst = (tmp[1] << 8) \|
	tmp[0];
	break;
	case 1:
	*dst = tmp[0];
	break;
	default:
	break;
	}
	}
	}

	static inline void crypto4xx_memcpy_from_le32(u32 dst, const void buf,
	size_t len)
	{
	crypto4xx_memcpy_swab32(dst, buf, len);
	}

	static inline void crypto4xx_memcpy_to_le32(__le32 dst, const void buf,
	size_t len)
	{
	crypto4xx_memcpy_swab32((u32 *)dst, buf, len);
	}

	int crypto4xx_setauthsize_aead(struct crypto_aead *ciper,
	unsigned int authsize);
	int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher,
	const u8 *key, unsigned int keylen);
	int crypto4xx_encrypt_aes_ccm(struct aead_request *req);
	int crypto4xx_decrypt_aes_ccm(struct aead_request *req);
	int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher,
	const u8 *key, unsigned int keylen);
	int crypto4xx_encrypt_aes_gcm(struct aead_request *req);
	int crypto4xx_decrypt_aes_gcm(struct aead_request *req);

	#endif