/* SPDX-License-Identifier: GPL-2.0 */ /* * amlogic.h - hardware cryptographic offloader for Amlogic SoC * * Copyright (C) 2018-2019 Corentin LABBE <[email protected]> */ #include <crypto/aes.h> #include <crypto/engine.h> #include <crypto/skcipher.h> #include <linux/debugfs.h> #include <linux/crypto.h> #include <linux/scatterlist.h> #define MODE_KEY … #define MODE_AES_128 … #define MODE_AES_192 … #define MODE_AES_256 … #define MESON_DECRYPT … #define MESON_ENCRYPT … #define MESON_OPMODE_ECB … #define MESON_OPMODE_CBC … #define MAXFLOW … #define MAXDESC … #define DESC_LAST … #define DESC_ENCRYPTION … #define DESC_OWN … /* * struct meson_desc - Descriptor for DMA operations * Note that without datasheet, some are unknown * @t_status: Descriptor of the cipher operation (see description below) * @t_src: Physical address of data to read * @t_dst: Physical address of data to write * t_status is segmented like this: * @len: 0-16 length of data to operate * @irq: 17 Ignored by hardware * @eoc: 18 End means the descriptor is the last * @loop: 19 Unknown * @mode: 20-23 Type of algorithm (AES, SHA) * @begin: 24 Unknown * @end: 25 Unknown * @op_mode: 26-27 Blockmode (CBC, ECB) * @enc: 28 0 means decryption, 1 is for encryption * @block: 29 Unknown * @error: 30 Unknown * @owner: 31 owner of the descriptor, 1 own by HW */ struct meson_desc { … }; /* * struct meson_flow - Information used by each flow * @engine: ptr to the crypto_engine for this flow * @keylen: keylen for this flow operation * @complete: completion for the current task on this flow * @status: set to 1 by interrupt if task is done * @t_phy: Physical address of task * @tl: pointer to the current ce_task for this flow * @stat_req: number of request done by this flow */ struct meson_flow { … }; /* * struct meson_dev - main container for all this driver information * @base: base address of amlogic-crypto * @busclk: bus clock for amlogic-crypto * @dev: the platform device * @chanlist: array of all flow * @flow: flow to use in next request * @irqs: IRQ numbers for amlogic-crypto * @dbgfs_dir: Debugfs dentry for statistic directory * @dbgfs_stats: Debugfs dentry for statistic counters */ struct meson_dev { … }; /* * struct meson_cipher_req_ctx - context for a skcipher request * @op_dir: direction (encrypt vs decrypt) for this request * @flow: the flow to use for this request */ struct meson_cipher_req_ctx { … }; /* * struct meson_cipher_tfm_ctx - context for a skcipher TFM * @key: pointer to key data * @keylen: len of the key * @keymode: The keymode(type and size of key) associated with this TFM * @mc: pointer to the private data of driver handling this TFM * @fallback_tfm: pointer to the fallback TFM */ struct meson_cipher_tfm_ctx { … }; /* * struct meson_alg_template - crypto_alg template * @type: the CRYPTO_ALG_TYPE for this template * @blockmode: the type of block operation * @mc: pointer to the meson_dev structure associated with this template * @alg: one of sub struct must be used * @stat_req: number of request done on this template * @stat_fb: total of all data len done on this template */ struct meson_alg_template { … }; int meson_enqueue(struct crypto_async_request *areq, u32 type); int meson_aes_setkey(struct crypto_skcipher *tfm, const u8 *key, unsigned int keylen); int meson_cipher_init(struct crypto_tfm *tfm); void meson_cipher_exit(struct crypto_tfm *tfm); int meson_skdecrypt(struct skcipher_request *areq); int meson_skencrypt(struct skcipher_request *areq); int meson_handle_cipher_request(struct crypto_engine *engine, void *areq);
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