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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * Intel Keem Bay OCS AES Crypto Driver.4 *5 * Copyright (C) 2018-2020 Intel Corporation6 */7 8#ifndef _CRYPTO_OCS_AES_H9#define _CRYPTO_OCS_AES_H10 11#include <linux/dma-mapping.h>12 13enum ocs_cipher {14 OCS_AES = 0,15 OCS_SM4 = 1,16};17 18enum ocs_mode {19 OCS_MODE_ECB = 0,20 OCS_MODE_CBC = 1,21 OCS_MODE_CTR = 2,22 OCS_MODE_CCM = 6,23 OCS_MODE_GCM = 7,24 OCS_MODE_CTS = 9,25};26 27enum ocs_instruction {28 OCS_ENCRYPT = 0,29 OCS_DECRYPT = 1,30 OCS_EXPAND = 2,31 OCS_BYPASS = 3,32};33 34/**35 * struct ocs_aes_dev - AES device context.36 * @list: List head for insertion into device list hold37 * by driver.38 * @dev: OCS AES device.39 * @irq: IRQ number.40 * @base_reg: IO base address of OCS AES.41 * @irq_copy_completion: Completion to indicate IRQ has been triggered.42 * @dma_err_mask: Error reported by OCS DMA interrupts.43 * @engine: Crypto engine for the device.44 */45struct ocs_aes_dev {46 struct list_head list;47 struct device *dev;48 int irq;49 void __iomem *base_reg;50 struct completion irq_completion;51 u32 dma_err_mask;52 struct crypto_engine *engine;53};54 55/**56 * struct ocs_dll_desc - Descriptor of an OCS DMA Linked List.57 * @vaddr: Virtual address of the linked list head.58 * @dma_addr: DMA address of the linked list head.59 * @size: Size (in bytes) of the linked list.60 */61struct ocs_dll_desc {62 void *vaddr;63 dma_addr_t dma_addr;64 size_t size;65};66 67int ocs_aes_set_key(struct ocs_aes_dev *aes_dev, const u32 key_size,68 const u8 *key, const enum ocs_cipher cipher);69 70int ocs_aes_op(struct ocs_aes_dev *aes_dev,71 enum ocs_mode mode,72 enum ocs_cipher cipher,73 enum ocs_instruction instruction,74 dma_addr_t dst_dma_list,75 dma_addr_t src_dma_list,76 u32 src_size,77 u8 *iv,78 u32 iv_size);79 80/**81 * ocs_aes_bypass_op() - Use OCS DMA to copy data.82 * @aes_dev: The OCS AES device to use.83 * @dst_dma_list: The OCS DMA list mapping the memory where input data84 * will be copied to.85 * @src_dma_list: The OCS DMA list mapping input data.86 * @src_size: The amount of data to copy.87 */88static inline int ocs_aes_bypass_op(struct ocs_aes_dev *aes_dev,89 dma_addr_t dst_dma_list,90 dma_addr_t src_dma_list, u32 src_size)91{92 return ocs_aes_op(aes_dev, OCS_MODE_ECB, OCS_AES, OCS_BYPASS,93 dst_dma_list, src_dma_list, src_size, NULL, 0);94}95 96int ocs_aes_gcm_op(struct ocs_aes_dev *aes_dev,97 enum ocs_cipher cipher,98 enum ocs_instruction instruction,99 dma_addr_t dst_dma_list,100 dma_addr_t src_dma_list,101 u32 src_size,102 const u8 *iv,103 dma_addr_t aad_dma_list,104 u32 aad_size,105 u8 *out_tag,106 u32 tag_size);107 108int ocs_aes_ccm_op(struct ocs_aes_dev *aes_dev,109 enum ocs_cipher cipher,110 enum ocs_instruction instruction,111 dma_addr_t dst_dma_list,112 dma_addr_t src_dma_list,113 u32 src_size,114 u8 *iv,115 dma_addr_t adata_dma_list,116 u32 adata_size,117 u8 *in_tag,118 u32 tag_size);119 120int ocs_create_linked_list_from_sg(const struct ocs_aes_dev *aes_dev,121 struct scatterlist *sg,122 int sg_dma_count,123 struct ocs_dll_desc *dll_desc,124 size_t data_size,125 size_t data_offset);126 127irqreturn_t ocs_aes_irq_handler(int irq, void *dev_id);128 129#endif130