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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/drivers/crypto/inside-secure/eip93/eip93-main.h
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/* SPDX-License-Identifier: GPL-2.0

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 *

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 * Copyright (C) 2019 - 2021

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 *

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 * Richard van Schagen <[email protected]>

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 * Christian Marangi <[email protected]

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 */

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#ifndef _EIP93_MAIN_H_

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#define _EIP93_MAIN_H_

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#include <crypto/internal/aead.h>

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#include <crypto/internal/hash.h>

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#include <crypto/internal/skcipher.h>

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#include <linux/bitfield.h>

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#include <linux/interrupt.h>

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#define EIP93_RING_BUSY_DELAY		500

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#define EIP93_RING_NUM			512

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#define EIP93_RING_BUSY			32

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#define EIP93_CRA_PRIORITY		1500

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#define EIP93_RING_SA_STATE_ADDR(base, idx)	((base) + (idx))

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#define EIP93_RING_SA_STATE_DMA(dma_base, idx)	((u32 __force)(dma_base) + \

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						 ((idx) * sizeof(struct sa_state)))

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/* cipher algorithms */

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#define EIP93_ALG_DES			BIT(0)

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#define EIP93_ALG_3DES			BIT(1)

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#define EIP93_ALG_AES			BIT(2)

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#define EIP93_ALG_MASK			GENMASK(2, 0)

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/* hash and hmac algorithms */

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#define EIP93_HASH_MD5			BIT(3)

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#define EIP93_HASH_SHA1			BIT(4)

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#define EIP93_HASH_SHA224			BIT(5)

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#define EIP93_HASH_SHA256			BIT(6)

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#define EIP93_HASH_HMAC			BIT(7)

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#define EIP93_HASH_MASK			GENMASK(6, 3)

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/* cipher modes */

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#define EIP93_MODE_CBC			BIT(8)

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#define EIP93_MODE_ECB			BIT(9)

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#define EIP93_MODE_CTR			BIT(10)

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#define EIP93_MODE_RFC3686		BIT(11)

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#define EIP93_MODE_MASK			GENMASK(10, 8)

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/* cipher encryption/decryption operations */

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#define EIP93_ENCRYPT			BIT(12)

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#define EIP93_DECRYPT			BIT(13)

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#define EIP93_BUSY			BIT(14)

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/* descriptor flags */

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#define EIP93_DESC_DMA_IV			BIT(0)

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#define EIP93_DESC_IPSEC			BIT(1)

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#define EIP93_DESC_FINISH			BIT(2)

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#define EIP93_DESC_LAST			BIT(3)

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#define EIP93_DESC_FAKE_HMAC		BIT(4)

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#define EIP93_DESC_PRNG			BIT(5)

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#define EIP93_DESC_HASH			BIT(6)

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#define EIP93_DESC_AEAD			BIT(7)

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#define EIP93_DESC_SKCIPHER		BIT(8)

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#define EIP93_DESC_ASYNC			BIT(9)

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#define IS_DMA_IV(desc_flags)		((desc_flags) & EIP93_DESC_DMA_IV)

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#define IS_DES(flags)			((flags) & EIP93_ALG_DES)

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#define IS_3DES(flags)			((flags) & EIP93_ALG_3DES)

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#define IS_AES(flags)			((flags) & EIP93_ALG_AES)

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#define IS_HASH_MD5(flags)		((flags) & EIP93_HASH_MD5)

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#define IS_HASH_SHA1(flags)		((flags) & EIP93_HASH_SHA1)

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#define IS_HASH_SHA224(flags)		((flags) & EIP93_HASH_SHA224)

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#define IS_HASH_SHA256(flags)		((flags) & EIP93_HASH_SHA256)

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#define IS_HMAC(flags)			((flags) & EIP93_HASH_HMAC)

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#define IS_CBC(mode)			((mode) & EIP93_MODE_CBC)

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#define IS_ECB(mode)			((mode) & EIP93_MODE_ECB)

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#define IS_CTR(mode)			((mode) & EIP93_MODE_CTR)

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#define IS_RFC3686(mode)		((mode) & EIP93_MODE_RFC3686)

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#define IS_BUSY(flags)			((flags) & EIP93_BUSY)

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#define IS_ENCRYPT(dir)			((dir) & EIP93_ENCRYPT)

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#define IS_DECRYPT(dir)			((dir) & EIP93_DECRYPT)

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#define IS_CIPHER(flags)		((flags) & (EIP93_ALG_DES | \

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						    EIP93_ALG_3DES |  \

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						    EIP93_ALG_AES))

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#define IS_HASH(flags)			((flags) & (EIP93_HASH_MD5 |  \

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						    EIP93_HASH_SHA1 |   \

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						    EIP93_HASH_SHA224 | \

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						    EIP93_HASH_SHA256))

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/**

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 * struct eip93_device - crypto engine device structure

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 */

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struct eip93_device {

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	void __iomem		*base;

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	struct device		*dev;

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	struct clk		*clk;

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	int			irq;

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	struct eip93_ring		*ring;

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};

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struct eip93_desc_ring {

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	void			*base;

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	void			*base_end;

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	dma_addr_t		base_dma;

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	/* write and read pointers */

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	void			*read;

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	void			*write;

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	/* descriptor element offset */

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	u32			offset;

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};

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struct eip93_state_pool {

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	void			*base;

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	dma_addr_t		base_dma;

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};

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struct eip93_ring {

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	struct tasklet_struct		done_task;

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	/* command/result rings */

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	struct eip93_desc_ring		cdr;

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	struct eip93_desc_ring		rdr;

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	spinlock_t			write_lock;

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	spinlock_t			read_lock;

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	/* aync idr */

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	spinlock_t			idr_lock;

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	struct idr			crypto_async_idr;

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};

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enum eip93_alg_type {

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	EIP93_ALG_TYPE_AEAD,

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	EIP93_ALG_TYPE_SKCIPHER,

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	EIP93_ALG_TYPE_HASH,

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};

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struct eip93_alg_template {

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	struct eip93_device	*eip93;

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	enum eip93_alg_type	type;

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	u32			flags;

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	union {

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		struct aead_alg		aead;

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		struct skcipher_alg	skcipher;

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		struct ahash_alg	ahash;

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	} alg;

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};

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#endif /* _EIP93_MAIN_H_ */

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