[linux-2.6-block.git] / drivers / crypto / omap-aes.h

/*
 * Cryptographic API.
 *
 * Support for OMAP AES HW ACCELERATOR defines
 *
 * Copyright (c) 2015 Texas Instruments Incorporated
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 *
 */
#ifndef __OMAP_AES_H__
#define __OMAP_AES_H__

#include <crypto/engine.h>

#define DST_MAXBURST			4
#define DMA_MIN				(DST_MAXBURST * sizeof(u32))

#define _calc_walked(inout) (dd->inout##_walk.offset - dd->inout##_sg->offset)

/*
 * OMAP TRM gives bitfields as start:end, where start is the higher bit
 * number. For example 7:0
 */
#define FLD_MASK(start, end)	(((1 << ((start) - (end) + 1)) - 1) << (end))
#define FLD_VAL(val, start, end) (((val) << (end)) & FLD_MASK(start, end))

#define AES_REG_KEY(dd, x)		((dd)->pdata->key_ofs - \
						(((x) ^ 0x01) * 0x04))
#define AES_REG_IV(dd, x)		((dd)->pdata->iv_ofs + ((x) * 0x04))

#define AES_REG_CTRL(dd)		((dd)->pdata->ctrl_ofs)
#define AES_REG_CTRL_CONTEXT_READY	BIT(31)
#define AES_REG_CTRL_CTR_WIDTH_MASK	GENMASK(8, 7)
#define AES_REG_CTRL_CTR_WIDTH_32	0
#define AES_REG_CTRL_CTR_WIDTH_64	BIT(7)
#define AES_REG_CTRL_CTR_WIDTH_96	BIT(8)
#define AES_REG_CTRL_CTR_WIDTH_128	GENMASK(8, 7)
#define AES_REG_CTRL_GCM		GENMASK(17, 16)
#define AES_REG_CTRL_CTR		BIT(6)
#define AES_REG_CTRL_CBC		BIT(5)
#define AES_REG_CTRL_KEY_SIZE		GENMASK(4, 3)
#define AES_REG_CTRL_DIRECTION		BIT(2)
#define AES_REG_CTRL_INPUT_READY	BIT(1)
#define AES_REG_CTRL_OUTPUT_READY	BIT(0)
#define AES_REG_CTRL_MASK		GENMASK(24, 2)

#define AES_REG_C_LEN_0			0x54
#define AES_REG_C_LEN_1			0x58
#define AES_REG_A_LEN			0x5C

#define AES_REG_DATA_N(dd, x)		((dd)->pdata->data_ofs + ((x) * 0x04))
#define AES_REG_TAG_N(dd, x)		(0x70 + ((x) * 0x04))

#define AES_REG_REV(dd)			((dd)->pdata->rev_ofs)

#define AES_REG_MASK(dd)		((dd)->pdata->mask_ofs)
#define AES_REG_MASK_SIDLE		BIT(6)
#define AES_REG_MASK_START		BIT(5)
#define AES_REG_MASK_DMA_OUT_EN		BIT(3)
#define AES_REG_MASK_DMA_IN_EN		BIT(2)
#define AES_REG_MASK_SOFTRESET		BIT(1)
#define AES_REG_AUTOIDLE		BIT(0)

#define AES_REG_LENGTH_N(x)		(0x54 + ((x) * 0x04))

#define AES_REG_IRQ_STATUS(dd)         ((dd)->pdata->irq_status_ofs)
#define AES_REG_IRQ_ENABLE(dd)         ((dd)->pdata->irq_enable_ofs)
#define AES_REG_IRQ_DATA_IN            BIT(1)
#define AES_REG_IRQ_DATA_OUT           BIT(2)
#define DEFAULT_TIMEOUT		(5 * HZ)

#define DEFAULT_AUTOSUSPEND_DELAY	1000

#define FLAGS_MODE_MASK		0x001f
#define FLAGS_ENCRYPT		BIT(0)
#define FLAGS_CBC		BIT(1)
#define FLAGS_CTR		BIT(2)
#define FLAGS_GCM		BIT(3)
#define FLAGS_RFC4106_GCM	BIT(4)

#define FLAGS_INIT		BIT(5)
#define FLAGS_FAST		BIT(6)
#define FLAGS_BUSY		BIT(7)

#define FLAGS_IN_DATA_ST_SHIFT	8
#define FLAGS_OUT_DATA_ST_SHIFT	10
#define FLAGS_ASSOC_DATA_ST_SHIFT	12

#define AES_BLOCK_WORDS		(AES_BLOCK_SIZE >> 2)

struct omap_aes_gcm_result {
	struct completion completion;
	int err;
};

struct omap_aes_ctx {
	struct crypto_engine_ctx enginectx;
	int		keylen;
	u32		key[AES_KEYSIZE_256 / sizeof(u32)];
	u8		nonce[4];
	struct crypto_sync_skcipher	*fallback;
	struct crypto_skcipher	*ctr;
};

struct omap_aes_reqctx {
	struct omap_aes_dev *dd;
	unsigned long mode;
	u8 iv[AES_BLOCK_SIZE];
	u32 auth_tag[AES_BLOCK_SIZE / sizeof(u32)];
};

#define OMAP_AES_QUEUE_LENGTH	1
#define OMAP_AES_CACHE_SIZE	0

struct omap_aes_algs_info {
	struct crypto_alg	*algs_list;
	unsigned int		size;
	unsigned int		registered;
};

struct omap_aes_aead_algs {
	struct aead_alg	*algs_list;
	unsigned int	size;
	unsigned int	registered;
};

struct omap_aes_pdata {
	struct omap_aes_algs_info	*algs_info;
	unsigned int	algs_info_size;
	struct omap_aes_aead_algs	*aead_algs_info;

	void		(*trigger)(struct omap_aes_dev *dd, int length);

	u32		key_ofs;
	u32		iv_ofs;
	u32		ctrl_ofs;
	u32		data_ofs;
	u32		rev_ofs;
	u32		mask_ofs;
	u32             irq_enable_ofs;
	u32             irq_status_ofs;

	u32		dma_enable_in;
	u32		dma_enable_out;
	u32		dma_start;

	u32		major_mask;
	u32		major_shift;
	u32		minor_mask;
	u32		minor_shift;
};

struct omap_aes_dev {
	struct list_head	list;
	unsigned long		phys_base;
	void __iomem		*io_base;
	struct omap_aes_ctx	*ctx;
	struct device		*dev;
	unsigned long		flags;
	int			err;

	struct tasklet_struct	done_task;
	struct aead_queue	aead_queue;
	spinlock_t		lock;

	struct ablkcipher_request	*req;
	struct aead_request		*aead_req;
	struct crypto_engine		*engine;

	/*
	 * total is used by PIO mode for book keeping so introduce
	 * variable total_save as need it to calc page_order
	 */
	size_t				total;
	size_t				total_save;
	size_t				assoc_len;
	size_t				authsize;

	struct scatterlist		*in_sg;
	struct scatterlist		*out_sg;

	/* Buffers for copying for unaligned cases */
	struct scatterlist		in_sgl[2];
	struct scatterlist		out_sgl;
	struct scatterlist		*orig_out;

	struct scatter_walk		in_walk;
	struct scatter_walk		out_walk;
	struct dma_chan		*dma_lch_in;
	struct dma_chan		*dma_lch_out;
	int			in_sg_len;
	int			out_sg_len;
	int			pio_only;
	const struct omap_aes_pdata	*pdata;
};

u32 omap_aes_read(struct omap_aes_dev *dd, u32 offset);
void omap_aes_write(struct omap_aes_dev *dd, u32 offset, u32 value);
struct omap_aes_dev *omap_aes_find_dev(struct omap_aes_reqctx *rctx);
int omap_aes_gcm_setkey(struct crypto_aead *tfm, const u8 *key,
			unsigned int keylen);
int omap_aes_4106gcm_setkey(struct crypto_aead *tfm, const u8 *key,
			    unsigned int keylen);
int omap_aes_gcm_encrypt(struct aead_request *req);
int omap_aes_gcm_decrypt(struct aead_request *req);
int omap_aes_4106gcm_encrypt(struct aead_request *req);
int omap_aes_4106gcm_decrypt(struct aead_request *req);
int omap_aes_write_ctrl(struct omap_aes_dev *dd);
int omap_aes_crypt_dma_start(struct omap_aes_dev *dd);
int omap_aes_crypt_dma_stop(struct omap_aes_dev *dd);
void omap_aes_gcm_dma_out_callback(void *data);
void omap_aes_clear_copy_flags(struct omap_aes_dev *dd);

#endif
Commit	Line	Data
5b3d4d2e TK	1	/*
	2	* Cryptographic API.
	3	*
	4	* Support for OMAP AES HW ACCELERATOR defines
	5	*
	6	* Copyright (c) 2015 Texas Instruments Incorporated
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as published
	10	* by the Free Software Foundation.
	11	*
	12	*/
	13	#ifndef __OMAP_AES_H__
	14	#define __OMAP_AES_H__
	15
c21c8b89 CL	16	#include <crypto/engine.h>
c21c8b89 CL	17
5b3d4d2e TK	18	#define DST_MAXBURST 4
	19	#define DMA_MIN (DST_MAXBURST * sizeof(u32))
	20
	21	#define _calc_walked(inout) (dd->inout##_walk.offset - dd->inout##_sg->offset)
	22
	23	/*
	24	* OMAP TRM gives bitfields as start:end, where start is the higher bit
	25	* number. For example 7:0
	26	*/
	27	#define FLD_MASK(start, end) (((1 << ((start) - (end) + 1)) - 1) << (end))
	28	#define FLD_VAL(val, start, end) (((val) << (end)) & FLD_MASK(start, end))
	29
	30	#define AES_REG_KEY(dd, x) ((dd)->pdata->key_ofs - \
	31	(((x) ^ 0x01) * 0x04))
	32	#define AES_REG_IV(dd, x) ((dd)->pdata->iv_ofs + ((x) * 0x04))
	33
	34	#define AES_REG_CTRL(dd) ((dd)->pdata->ctrl_ofs)
ad18cc9d	35	#define AES_REG_CTRL_CONTEXT_READY BIT(31)
5b3d4d2e TK	36	#define AES_REG_CTRL_CTR_WIDTH_MASK GENMASK(8, 7)
	37	#define AES_REG_CTRL_CTR_WIDTH_32 0
	38	#define AES_REG_CTRL_CTR_WIDTH_64 BIT(7)
	39	#define AES_REG_CTRL_CTR_WIDTH_96 BIT(8)
	40	#define AES_REG_CTRL_CTR_WIDTH_128 GENMASK(8, 7)
ad18cc9d	41	#define AES_REG_CTRL_GCM GENMASK(17, 16)
5b3d4d2e TK	42	#define AES_REG_CTRL_CTR BIT(6)
	43	#define AES_REG_CTRL_CBC BIT(5)
	44	#define AES_REG_CTRL_KEY_SIZE GENMASK(4, 3)
	45	#define AES_REG_CTRL_DIRECTION BIT(2)
	46	#define AES_REG_CTRL_INPUT_READY BIT(1)
	47	#define AES_REG_CTRL_OUTPUT_READY BIT(0)
	48	#define AES_REG_CTRL_MASK GENMASK(24, 2)
	49
ad18cc9d TK	50	#define AES_REG_C_LEN_0 0x54
	51	#define AES_REG_C_LEN_1 0x58
	52	#define AES_REG_A_LEN 0x5C
	53
5b3d4d2e	54	#define AES_REG_DATA_N(dd, x) ((dd)->pdata->data_ofs + ((x) * 0x04))
ad18cc9d	55	#define AES_REG_TAG_N(dd, x) (0x70 + ((x) * 0x04))
5b3d4d2e TK	56
	57	#define AES_REG_REV(dd) ((dd)->pdata->rev_ofs)
	58
	59	#define AES_REG_MASK(dd) ((dd)->pdata->mask_ofs)
	60	#define AES_REG_MASK_SIDLE BIT(6)
	61	#define AES_REG_MASK_START BIT(5)
	62	#define AES_REG_MASK_DMA_OUT_EN BIT(3)
	63	#define AES_REG_MASK_DMA_IN_EN BIT(2)
	64	#define AES_REG_MASK_SOFTRESET BIT(1)
	65	#define AES_REG_AUTOIDLE BIT(0)
	66
	67	#define AES_REG_LENGTH_N(x) (0x54 + ((x) * 0x04))
	68
	69	#define AES_REG_IRQ_STATUS(dd) ((dd)->pdata->irq_status_ofs)
	70	#define AES_REG_IRQ_ENABLE(dd) ((dd)->pdata->irq_enable_ofs)
	71	#define AES_REG_IRQ_DATA_IN BIT(1)
	72	#define AES_REG_IRQ_DATA_OUT BIT(2)
	73	#define DEFAULT_TIMEOUT (5 * HZ)
	74
	75	#define DEFAULT_AUTOSUSPEND_DELAY 1000
	76
ad18cc9d	77	#define FLAGS_MODE_MASK 0x001f
5b3d4d2e TK	78	#define FLAGS_ENCRYPT BIT(0)
5b3d4d2e TK	79	#define FLAGS_CBC BIT(1)
ad18cc9d TK	80	#define FLAGS_CTR BIT(2)
	81	#define FLAGS_GCM BIT(3)
	82	#define FLAGS_RFC4106_GCM BIT(4)
5b3d4d2e	83
ad18cc9d TK	84	#define FLAGS_INIT BIT(5)
	85	#define FLAGS_FAST BIT(6)
	86	#define FLAGS_BUSY BIT(7)
5b3d4d2e TK	87
	88	#define FLAGS_IN_DATA_ST_SHIFT 8
	89	#define FLAGS_OUT_DATA_ST_SHIFT 10
ad18cc9d	90	#define FLAGS_ASSOC_DATA_ST_SHIFT 12
5b3d4d2e TK	91
	92	#define AES_BLOCK_WORDS (AES_BLOCK_SIZE >> 2)
	93
ad18cc9d TK	94	struct omap_aes_gcm_result {
	95	struct completion completion;
	96	int err;
	97	};
	98
5b3d4d2e	99	struct omap_aes_ctx {
c21c8b89	100	struct crypto_engine_ctx enginectx;
5b3d4d2e TK	101	int keylen;
5b3d4d2e TK	102	u32 key[AES_KEYSIZE_256 / sizeof(u32)];
ad18cc9d	103	u8 nonce[4];
e87f203c	104	struct crypto_sync_skcipher *fallback;
ad18cc9d	105	struct crypto_skcipher *ctr;
5b3d4d2e TK	106	};
	107
	108	struct omap_aes_reqctx {
	109	struct omap_aes_dev *dd;
	110	unsigned long mode;
ad18cc9d TK	111	u8 iv[AES_BLOCK_SIZE];
ad18cc9d TK	112	u32 auth_tag[AES_BLOCK_SIZE / sizeof(u32)];
5b3d4d2e TK	113	};
	114
	115	#define OMAP_AES_QUEUE_LENGTH 1
	116	#define OMAP_AES_CACHE_SIZE 0
	117
	118	struct omap_aes_algs_info {
	119	struct crypto_alg *algs_list;
	120	unsigned int size;
	121	unsigned int registered;
	122	};
	123
ad18cc9d TK	124	struct omap_aes_aead_algs {
	125	struct aead_alg *algs_list;
	126	unsigned int size;
	127	unsigned int registered;
	128	};
	129
5b3d4d2e TK	130	struct omap_aes_pdata {
	131	struct omap_aes_algs_info *algs_info;
	132	unsigned int algs_info_size;
ad18cc9d	133	struct omap_aes_aead_algs *aead_algs_info;
5b3d4d2e TK	134
	135	void (trigger)(struct omap_aes_dev dd, int length);
	136
	137	u32 key_ofs;
	138	u32 iv_ofs;
	139	u32 ctrl_ofs;
	140	u32 data_ofs;
	141	u32 rev_ofs;
	142	u32 mask_ofs;
	143	u32 irq_enable_ofs;
	144	u32 irq_status_ofs;
	145
	146	u32 dma_enable_in;
	147	u32 dma_enable_out;
	148	u32 dma_start;
	149
	150	u32 major_mask;
	151	u32 major_shift;
	152	u32 minor_mask;
	153	u32 minor_shift;
	154	};
	155
	156	struct omap_aes_dev {
	157	struct list_head list;
	158	unsigned long phys_base;
	159	void __iomem *io_base;
	160	struct omap_aes_ctx *ctx;
	161	struct device *dev;
	162	unsigned long flags;
	163	int err;
	164
	165	struct tasklet_struct done_task;
ad18cc9d TK	166	struct aead_queue aead_queue;
ad18cc9d TK	167	spinlock_t lock;
5b3d4d2e TK	168
5b3d4d2e TK	169	struct ablkcipher_request *req;
ad18cc9d	170	struct aead_request *aead_req;
5b3d4d2e TK	171	struct crypto_engine *engine;
	172
	173	/*
	174	* total is used by PIO mode for book keeping so introduce
	175	* variable total_save as need it to calc page_order
	176	*/
	177	size_t total;
	178	size_t total_save;
ad18cc9d TK	179	size_t assoc_len;
ad18cc9d TK	180	size_t authsize;
5b3d4d2e TK	181
	182	struct scatterlist *in_sg;
	183	struct scatterlist *out_sg;
	184
	185	/* Buffers for copying for unaligned cases */
ad18cc9d	186	struct scatterlist in_sgl[2];
5b3d4d2e TK	187	struct scatterlist out_sgl;
	188	struct scatterlist *orig_out;
	189
	190	struct scatter_walk in_walk;
	191	struct scatter_walk out_walk;
	192	struct dma_chan *dma_lch_in;
	193	struct dma_chan *dma_lch_out;
	194	int in_sg_len;
	195	int out_sg_len;
	196	int pio_only;
	197	const struct omap_aes_pdata *pdata;
	198	};
	199
d695bfd6 TK	200	u32 omap_aes_read(struct omap_aes_dev *dd, u32 offset);
	201	void omap_aes_write(struct omap_aes_dev *dd, u32 offset, u32 value);
	202	struct omap_aes_dev omap_aes_find_dev(struct omap_aes_reqctx rctx);
ad18cc9d TK	203	int omap_aes_gcm_setkey(struct crypto_aead tfm, const u8 key,
	204	unsigned int keylen);
	205	int omap_aes_4106gcm_setkey(struct crypto_aead tfm, const u8 key,
	206	unsigned int keylen);
	207	int omap_aes_gcm_encrypt(struct aead_request *req);
	208	int omap_aes_gcm_decrypt(struct aead_request *req);
	209	int omap_aes_4106gcm_encrypt(struct aead_request *req);
	210	int omap_aes_4106gcm_decrypt(struct aead_request *req);
d695bfd6 TK	211	int omap_aes_write_ctrl(struct omap_aes_dev *dd);
	212	int omap_aes_crypt_dma_start(struct omap_aes_dev *dd);
	213	int omap_aes_crypt_dma_stop(struct omap_aes_dev *dd);
ad18cc9d TK	214	void omap_aes_gcm_dma_out_callback(void *data);
ad18cc9d TK	215	void omap_aes_clear_copy_flags(struct omap_aes_dev *dd);
d695bfd6	216
5b3d4d2e	217	#endif