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

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Cryptographic API.
 *
 * Support for OMAP AES HW ACCELERATOR defines
 *
 * Copyright (c) 2015 Texas Instruments Incorporated
 */
#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
d2912cb1	1	/* SPDX-License-Identifier: GPL-2.0-only */
5b3d4d2e TK	2	/*
	3	* Cryptographic API.
	4	*
	5	* Support for OMAP AES HW ACCELERATOR defines
	6	*
	7	* Copyright (c) 2015 Texas Instruments Incorporated
5b3d4d2e TK	8	*/
	9	#ifndef __OMAP_AES_H__
	10	#define __OMAP_AES_H__
	11
c21c8b89 CL	12	#include <crypto/engine.h>
c21c8b89 CL	13
5b3d4d2e TK	14	#define DST_MAXBURST 4
	15	#define DMA_MIN (DST_MAXBURST * sizeof(u32))
	16
	17	#define _calc_walked(inout) (dd->inout##_walk.offset - dd->inout##_sg->offset)
	18
	19	/*
	20	* OMAP TRM gives bitfields as start:end, where start is the higher bit
	21	* number. For example 7:0
	22	*/
	23	#define FLD_MASK(start, end) (((1 << ((start) - (end) + 1)) - 1) << (end))
	24	#define FLD_VAL(val, start, end) (((val) << (end)) & FLD_MASK(start, end))
	25
	26	#define AES_REG_KEY(dd, x) ((dd)->pdata->key_ofs - \
	27	(((x) ^ 0x01) * 0x04))
	28	#define AES_REG_IV(dd, x) ((dd)->pdata->iv_ofs + ((x) * 0x04))
	29
	30	#define AES_REG_CTRL(dd) ((dd)->pdata->ctrl_ofs)
ad18cc9d	31	#define AES_REG_CTRL_CONTEXT_READY BIT(31)
5b3d4d2e TK	32	#define AES_REG_CTRL_CTR_WIDTH_MASK GENMASK(8, 7)
	33	#define AES_REG_CTRL_CTR_WIDTH_32 0
	34	#define AES_REG_CTRL_CTR_WIDTH_64 BIT(7)
	35	#define AES_REG_CTRL_CTR_WIDTH_96 BIT(8)
	36	#define AES_REG_CTRL_CTR_WIDTH_128 GENMASK(8, 7)
ad18cc9d	37	#define AES_REG_CTRL_GCM GENMASK(17, 16)
5b3d4d2e TK	38	#define AES_REG_CTRL_CTR BIT(6)
	39	#define AES_REG_CTRL_CBC BIT(5)
	40	#define AES_REG_CTRL_KEY_SIZE GENMASK(4, 3)
	41	#define AES_REG_CTRL_DIRECTION BIT(2)
	42	#define AES_REG_CTRL_INPUT_READY BIT(1)
	43	#define AES_REG_CTRL_OUTPUT_READY BIT(0)
	44	#define AES_REG_CTRL_MASK GENMASK(24, 2)
	45
ad18cc9d TK	46	#define AES_REG_C_LEN_0 0x54
	47	#define AES_REG_C_LEN_1 0x58
	48	#define AES_REG_A_LEN 0x5C
	49
5b3d4d2e	50	#define AES_REG_DATA_N(dd, x) ((dd)->pdata->data_ofs + ((x) * 0x04))
ad18cc9d	51	#define AES_REG_TAG_N(dd, x) (0x70 + ((x) * 0x04))
5b3d4d2e TK	52
	53	#define AES_REG_REV(dd) ((dd)->pdata->rev_ofs)
	54
	55	#define AES_REG_MASK(dd) ((dd)->pdata->mask_ofs)
	56	#define AES_REG_MASK_SIDLE BIT(6)
	57	#define AES_REG_MASK_START BIT(5)
	58	#define AES_REG_MASK_DMA_OUT_EN BIT(3)
	59	#define AES_REG_MASK_DMA_IN_EN BIT(2)
	60	#define AES_REG_MASK_SOFTRESET BIT(1)
	61	#define AES_REG_AUTOIDLE BIT(0)
	62
	63	#define AES_REG_LENGTH_N(x) (0x54 + ((x) * 0x04))
	64
	65	#define AES_REG_IRQ_STATUS(dd) ((dd)->pdata->irq_status_ofs)
	66	#define AES_REG_IRQ_ENABLE(dd) ((dd)->pdata->irq_enable_ofs)
	67	#define AES_REG_IRQ_DATA_IN BIT(1)
	68	#define AES_REG_IRQ_DATA_OUT BIT(2)
	69	#define DEFAULT_TIMEOUT (5 * HZ)
	70
	71	#define DEFAULT_AUTOSUSPEND_DELAY 1000
	72
ad18cc9d	73	#define FLAGS_MODE_MASK 0x001f
5b3d4d2e TK	74	#define FLAGS_ENCRYPT BIT(0)
5b3d4d2e TK	75	#define FLAGS_CBC BIT(1)
ad18cc9d TK	76	#define FLAGS_CTR BIT(2)
	77	#define FLAGS_GCM BIT(3)
	78	#define FLAGS_RFC4106_GCM BIT(4)
5b3d4d2e	79
ad18cc9d TK	80	#define FLAGS_INIT BIT(5)
	81	#define FLAGS_FAST BIT(6)
	82	#define FLAGS_BUSY BIT(7)
5b3d4d2e TK	83
	84	#define FLAGS_IN_DATA_ST_SHIFT 8
	85	#define FLAGS_OUT_DATA_ST_SHIFT 10
ad18cc9d	86	#define FLAGS_ASSOC_DATA_ST_SHIFT 12
5b3d4d2e TK	87
	88	#define AES_BLOCK_WORDS (AES_BLOCK_SIZE >> 2)
	89
ad18cc9d TK	90	struct omap_aes_gcm_result {
	91	struct completion completion;
	92	int err;
	93	};
	94
5b3d4d2e	95	struct omap_aes_ctx {
c21c8b89	96	struct crypto_engine_ctx enginectx;
5b3d4d2e TK	97	int keylen;
5b3d4d2e TK	98	u32 key[AES_KEYSIZE_256 / sizeof(u32)];
ad18cc9d	99	u8 nonce[4];
e87f203c	100	struct crypto_sync_skcipher *fallback;
ad18cc9d	101	struct crypto_skcipher *ctr;
5b3d4d2e TK	102	};
	103
	104	struct omap_aes_reqctx {
	105	struct omap_aes_dev *dd;
	106	unsigned long mode;
ad18cc9d TK	107	u8 iv[AES_BLOCK_SIZE];
ad18cc9d TK	108	u32 auth_tag[AES_BLOCK_SIZE / sizeof(u32)];
5b3d4d2e TK	109	};
	110
	111	#define OMAP_AES_QUEUE_LENGTH 1
	112	#define OMAP_AES_CACHE_SIZE 0
	113
	114	struct omap_aes_algs_info {
	115	struct crypto_alg *algs_list;
	116	unsigned int size;
	117	unsigned int registered;
	118	};
	119
ad18cc9d TK	120	struct omap_aes_aead_algs {
	121	struct aead_alg *algs_list;
	122	unsigned int size;
	123	unsigned int registered;
	124	};
	125
5b3d4d2e TK	126	struct omap_aes_pdata {
	127	struct omap_aes_algs_info *algs_info;
	128	unsigned int algs_info_size;
ad18cc9d	129	struct omap_aes_aead_algs *aead_algs_info;
5b3d4d2e TK	130
	131	void (trigger)(struct omap_aes_dev dd, int length);
	132
	133	u32 key_ofs;
	134	u32 iv_ofs;
	135	u32 ctrl_ofs;
	136	u32 data_ofs;
	137	u32 rev_ofs;
	138	u32 mask_ofs;
	139	u32 irq_enable_ofs;
	140	u32 irq_status_ofs;
	141
	142	u32 dma_enable_in;
	143	u32 dma_enable_out;
	144	u32 dma_start;
	145
	146	u32 major_mask;
	147	u32 major_shift;
	148	u32 minor_mask;
	149	u32 minor_shift;
	150	};
	151
	152	struct omap_aes_dev {
	153	struct list_head list;
	154	unsigned long phys_base;
	155	void __iomem *io_base;
	156	struct omap_aes_ctx *ctx;
	157	struct device *dev;
	158	unsigned long flags;
	159	int err;
	160
	161	struct tasklet_struct done_task;
ad18cc9d TK	162	struct aead_queue aead_queue;
ad18cc9d TK	163	spinlock_t lock;
5b3d4d2e TK	164
5b3d4d2e TK	165	struct ablkcipher_request *req;
ad18cc9d	166	struct aead_request *aead_req;
5b3d4d2e TK	167	struct crypto_engine *engine;
	168
	169	/*
	170	* total is used by PIO mode for book keeping so introduce
	171	* variable total_save as need it to calc page_order
	172	*/
	173	size_t total;
	174	size_t total_save;
ad18cc9d TK	175	size_t assoc_len;
ad18cc9d TK	176	size_t authsize;
5b3d4d2e TK	177
	178	struct scatterlist *in_sg;
	179	struct scatterlist *out_sg;
	180
	181	/* Buffers for copying for unaligned cases */
ad18cc9d	182	struct scatterlist in_sgl[2];
5b3d4d2e TK	183	struct scatterlist out_sgl;
	184	struct scatterlist *orig_out;
	185
	186	struct scatter_walk in_walk;
	187	struct scatter_walk out_walk;
	188	struct dma_chan *dma_lch_in;
	189	struct dma_chan *dma_lch_out;
	190	int in_sg_len;
	191	int out_sg_len;
	192	int pio_only;
	193	const struct omap_aes_pdata *pdata;
	194	};
	195
d695bfd6 TK	196	u32 omap_aes_read(struct omap_aes_dev *dd, u32 offset);
	197	void omap_aes_write(struct omap_aes_dev *dd, u32 offset, u32 value);
	198	struct omap_aes_dev omap_aes_find_dev(struct omap_aes_reqctx rctx);
ad18cc9d TK	199	int omap_aes_gcm_setkey(struct crypto_aead tfm, const u8 key,
	200	unsigned int keylen);
	201	int omap_aes_4106gcm_setkey(struct crypto_aead tfm, const u8 key,
	202	unsigned int keylen);
	203	int omap_aes_gcm_encrypt(struct aead_request *req);
	204	int omap_aes_gcm_decrypt(struct aead_request *req);
	205	int omap_aes_4106gcm_encrypt(struct aead_request *req);
	206	int omap_aes_4106gcm_decrypt(struct aead_request *req);
d695bfd6 TK	207	int omap_aes_write_ctrl(struct omap_aes_dev *dd);
	208	int omap_aes_crypt_dma_start(struct omap_aes_dev *dd);
	209	int omap_aes_crypt_dma_stop(struct omap_aes_dev *dd);
ad18cc9d TK	210	void omap_aes_gcm_dma_out_callback(void *data);
ad18cc9d TK	211	void omap_aes_clear_copy_flags(struct omap_aes_dev *dd);
d695bfd6	212
5b3d4d2e	213	#endif