diff options
Diffstat (limited to 'drivers/crypto/keembay/ocs-hcu.h')
| -rw-r--r-- | drivers/crypto/keembay/ocs-hcu.h | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/drivers/crypto/keembay/ocs-hcu.h b/drivers/crypto/keembay/ocs-hcu.h new file mode 100644 index 000000000..fbbbb92a0 --- /dev/null +++ b/drivers/crypto/keembay/ocs-hcu.h @@ -0,0 +1,106 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Intel Keem Bay OCS HCU Crypto Driver. + * + * Copyright (C) 2018-2020 Intel Corporation + */ + +#include <linux/dma-mapping.h> + +#ifndef _CRYPTO_OCS_HCU_H +#define _CRYPTO_OCS_HCU_H + +#define OCS_HCU_DMA_BIT_MASK DMA_BIT_MASK(32) + +#define OCS_HCU_HW_KEY_LEN 64 + +struct ocs_hcu_dma_list; + +enum ocs_hcu_algo { + OCS_HCU_ALGO_SHA256 = 2, + OCS_HCU_ALGO_SHA224 = 3, + OCS_HCU_ALGO_SHA384 = 4, + OCS_HCU_ALGO_SHA512 = 5, + OCS_HCU_ALGO_SM3 = 6, +}; + +/** + * struct ocs_hcu_dev - OCS HCU device context. + * @list: List of device contexts. + * @dev: OCS HCU device. + * @io_base: Base address of OCS HCU registers. + * @engine: Crypto engine for the device. + * @irq: IRQ number. + * @irq_done: Completion for IRQ. + * @irq_err: Flag indicating an IRQ error has happened. + */ +struct ocs_hcu_dev { + struct list_head list; + struct device *dev; + void __iomem *io_base; + struct crypto_engine *engine; + int irq; + struct completion irq_done; + bool irq_err; +}; + +/** + * struct ocs_hcu_idata - Intermediate data generated by the HCU. + * @msg_len_lo: Length of data the HCU has operated on in bits, low 32b. + * @msg_len_hi: Length of data the HCU has operated on in bits, high 32b. + * @digest: The digest read from the HCU. If the HCU is terminated, it will + * contain the actual hash digest. Otherwise it is the intermediate + * state. + */ +struct ocs_hcu_idata { + u32 msg_len_lo; + u32 msg_len_hi; + u8 digest[SHA512_DIGEST_SIZE]; +}; + +/** + * struct ocs_hcu_hash_ctx - Context for OCS HCU hashing operation. + * @algo: The hashing algorithm being used. + * @idata: The current intermediate data. + */ +struct ocs_hcu_hash_ctx { + enum ocs_hcu_algo algo; + struct ocs_hcu_idata idata; +}; + +irqreturn_t ocs_hcu_irq_handler(int irq, void *dev_id); + +struct ocs_hcu_dma_list *ocs_hcu_dma_list_alloc(struct ocs_hcu_dev *hcu_dev, + int max_nents); + +void ocs_hcu_dma_list_free(struct ocs_hcu_dev *hcu_dev, + struct ocs_hcu_dma_list *dma_list); + +int ocs_hcu_dma_list_add_tail(struct ocs_hcu_dev *hcu_dev, + struct ocs_hcu_dma_list *dma_list, + dma_addr_t addr, u32 len); + +int ocs_hcu_hash_init(struct ocs_hcu_hash_ctx *ctx, enum ocs_hcu_algo algo); + +int ocs_hcu_hash_update(struct ocs_hcu_dev *hcu_dev, + struct ocs_hcu_hash_ctx *ctx, + const struct ocs_hcu_dma_list *dma_list); + +int ocs_hcu_hash_finup(struct ocs_hcu_dev *hcu_dev, + const struct ocs_hcu_hash_ctx *ctx, + const struct ocs_hcu_dma_list *dma_list, + u8 *dgst, size_t dgst_len); + +int ocs_hcu_hash_final(struct ocs_hcu_dev *hcu_dev, + const struct ocs_hcu_hash_ctx *ctx, u8 *dgst, + size_t dgst_len); + +int ocs_hcu_digest(struct ocs_hcu_dev *hcu_dev, enum ocs_hcu_algo algo, + void *data, size_t data_len, u8 *dgst, size_t dgst_len); + +int ocs_hcu_hmac(struct ocs_hcu_dev *hcu_dev, enum ocs_hcu_algo algo, + const u8 *key, size_t key_len, + const struct ocs_hcu_dma_list *dma_list, + u8 *dgst, size_t dgst_len); + +#endif /* _CRYPTO_OCS_HCU_H */ |