mirror of https://github.com/torvalds/linux.git
102 lines
2.3 KiB
C
102 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* K3 DTHE V2 crypto accelerator driver
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*
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* Copyright (C) Texas Instruments 2025 - https://www.ti.com
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* Author: T Pratham <t-pratham@ti.com>
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*/
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#ifndef __TI_DTHEV2_H__
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#define __TI_DTHEV2_H__
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#include <crypto/aead.h>
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#include <crypto/aes.h>
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#include <crypto/algapi.h>
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#include <crypto/engine.h>
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#include <crypto/hash.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/delay.h>
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#include <linux/dmaengine.h>
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#include <linux/dmapool.h>
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#include <linux/dma-mapping.h>
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#include <linux/io.h>
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#include <linux/scatterlist.h>
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#define DTHE_REG_SIZE 4
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#define DTHE_DMA_TIMEOUT_MS 2000
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enum dthe_aes_mode {
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DTHE_AES_ECB = 0,
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DTHE_AES_CBC,
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};
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/* Driver specific struct definitions */
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/**
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* struct dthe_data - DTHE_V2 driver instance data
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* @dev: Device pointer
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* @regs: Base address of the register space
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* @list: list node for dev
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* @engine: Crypto engine instance
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* @dma_aes_rx: AES Rx DMA Channel
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* @dma_aes_tx: AES Tx DMA Channel
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* @dma_sha_tx: SHA Tx DMA Channel
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*/
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struct dthe_data {
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struct device *dev;
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void __iomem *regs;
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struct list_head list;
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struct crypto_engine *engine;
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struct dma_chan *dma_aes_rx;
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struct dma_chan *dma_aes_tx;
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struct dma_chan *dma_sha_tx;
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};
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/**
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* struct dthe_list - device data list head
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* @dev_list: linked list head
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* @lock: Spinlock protecting accesses to the list
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*/
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struct dthe_list {
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struct list_head dev_list;
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spinlock_t lock;
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};
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/**
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* struct dthe_tfm_ctx - Transform ctx struct containing ctx for all sub-components of DTHE V2
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* @dev_data: Device data struct pointer
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* @keylen: AES key length
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* @key: AES key
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* @aes_mode: AES mode
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*/
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struct dthe_tfm_ctx {
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struct dthe_data *dev_data;
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unsigned int keylen;
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u32 key[AES_KEYSIZE_256 / sizeof(u32)];
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enum dthe_aes_mode aes_mode;
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};
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/**
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* struct dthe_aes_req_ctx - AES engine req ctx struct
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* @enc: flag indicating encryption or decryption operation
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* @aes_compl: Completion variable for use in manual completion in case of DMA callback failure
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*/
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struct dthe_aes_req_ctx {
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int enc;
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struct completion aes_compl;
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};
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/* Struct definitions end */
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struct dthe_data *dthe_get_dev(struct dthe_tfm_ctx *ctx);
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int dthe_register_aes_algs(void);
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void dthe_unregister_aes_algs(void);
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#endif
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