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106 lines
2.9 KiB
106 lines
2.9 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Intel Keem Bay OCS HCU Crypto Driver. |
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* |
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* Copyright (C) 2018-2020 Intel Corporation |
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*/ |
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#include <linux/dma-mapping.h> |
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#ifndef _CRYPTO_OCS_HCU_H |
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#define _CRYPTO_OCS_HCU_H |
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#define OCS_HCU_DMA_BIT_MASK DMA_BIT_MASK(32) |
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#define OCS_HCU_HW_KEY_LEN 64 |
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struct ocs_hcu_dma_list; |
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enum ocs_hcu_algo { |
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OCS_HCU_ALGO_SHA256 = 2, |
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OCS_HCU_ALGO_SHA224 = 3, |
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OCS_HCU_ALGO_SHA384 = 4, |
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OCS_HCU_ALGO_SHA512 = 5, |
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OCS_HCU_ALGO_SM3 = 6, |
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}; |
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/** |
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* struct ocs_hcu_dev - OCS HCU device context. |
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* @list: List of device contexts. |
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* @dev: OCS HCU device. |
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* @io_base: Base address of OCS HCU registers. |
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* @engine: Crypto engine for the device. |
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* @irq: IRQ number. |
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* @irq_done: Completion for IRQ. |
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* @irq_err: Flag indicating an IRQ error has happened. |
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*/ |
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struct ocs_hcu_dev { |
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struct list_head list; |
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struct device *dev; |
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void __iomem *io_base; |
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struct crypto_engine *engine; |
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int irq; |
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struct completion irq_done; |
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bool irq_err; |
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}; |
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/** |
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* struct ocs_hcu_idata - Intermediate data generated by the HCU. |
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* @msg_len_lo: Length of data the HCU has operated on in bits, low 32b. |
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* @msg_len_hi: Length of data the HCU has operated on in bits, high 32b. |
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* @digest: The digest read from the HCU. If the HCU is terminated, it will |
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* contain the actual hash digest. Otherwise it is the intermediate |
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* state. |
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*/ |
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struct ocs_hcu_idata { |
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u32 msg_len_lo; |
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u32 msg_len_hi; |
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u8 digest[SHA512_DIGEST_SIZE]; |
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}; |
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/** |
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* struct ocs_hcu_hash_ctx - Context for OCS HCU hashing operation. |
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* @algo: The hashing algorithm being used. |
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* @idata: The current intermediate data. |
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*/ |
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struct ocs_hcu_hash_ctx { |
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enum ocs_hcu_algo algo; |
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struct ocs_hcu_idata idata; |
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}; |
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irqreturn_t ocs_hcu_irq_handler(int irq, void *dev_id); |
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struct ocs_hcu_dma_list *ocs_hcu_dma_list_alloc(struct ocs_hcu_dev *hcu_dev, |
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int max_nents); |
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void ocs_hcu_dma_list_free(struct ocs_hcu_dev *hcu_dev, |
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struct ocs_hcu_dma_list *dma_list); |
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int ocs_hcu_dma_list_add_tail(struct ocs_hcu_dev *hcu_dev, |
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struct ocs_hcu_dma_list *dma_list, |
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dma_addr_t addr, u32 len); |
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int ocs_hcu_hash_init(struct ocs_hcu_hash_ctx *ctx, enum ocs_hcu_algo algo); |
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int ocs_hcu_hash_update(struct ocs_hcu_dev *hcu_dev, |
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struct ocs_hcu_hash_ctx *ctx, |
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const struct ocs_hcu_dma_list *dma_list); |
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int ocs_hcu_hash_finup(struct ocs_hcu_dev *hcu_dev, |
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const struct ocs_hcu_hash_ctx *ctx, |
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const struct ocs_hcu_dma_list *dma_list, |
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u8 *dgst, size_t dgst_len); |
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int ocs_hcu_hash_final(struct ocs_hcu_dev *hcu_dev, |
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const struct ocs_hcu_hash_ctx *ctx, u8 *dgst, |
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size_t dgst_len); |
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int ocs_hcu_digest(struct ocs_hcu_dev *hcu_dev, enum ocs_hcu_algo algo, |
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void *data, size_t data_len, u8 *dgst, size_t dgst_len); |
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int ocs_hcu_hmac(struct ocs_hcu_dev *hcu_dev, enum ocs_hcu_algo algo, |
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const u8 *key, size_t key_len, |
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const struct ocs_hcu_dma_list *dma_list, |
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u8 *dgst, size_t dgst_len); |
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#endif /* _CRYPTO_OCS_HCU_H */
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