1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Intel Keem Bay OCS AES Crypto Driver.
5 * Copyright (C) 2018-2020 Intel Corporation
8 #ifndef _CRYPTO_OCS_AES_H
9 #define _CRYPTO_OCS_AES_H
11 #include <linux/dma-mapping.h>
27 enum ocs_instruction {
35 * struct ocs_aes_dev - AES device context.
36 * @list: List head for insertion into device list hold
38 * @dev: OCS AES device.
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.
46 struct list_head list;
49 void __iomem *base_reg;
50 struct completion irq_completion;
52 struct crypto_engine *engine;
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.
67 int ocs_aes_set_key(struct ocs_aes_dev *aes_dev, const u32 key_size,
68 const u8 *key, const enum ocs_cipher cipher);
70 int ocs_aes_op(struct ocs_aes_dev *aes_dev,
72 enum ocs_cipher cipher,
73 enum ocs_instruction instruction,
74 dma_addr_t dst_dma_list,
75 dma_addr_t src_dma_list,
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 data
85 * @src_dma_list: The OCS DMA list mapping input data.
86 * @src_size: The amount of data to copy.
88 static 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)
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);
96 int 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,
103 dma_addr_t aad_dma_list,
108 int 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,
115 dma_addr_t adata_dma_list,
120 int ocs_create_linked_list_from_sg(const struct ocs_aes_dev *aes_dev,
121 struct scatterlist *sg,
123 struct ocs_dll_desc *dll_desc,
127 irqreturn_t ocs_aes_irq_handler(int irq, void *dev_id);