cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ocs-aes.h (3238B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * Intel Keem Bay OCS AES Crypto Driver.
      4 *
      5 * Copyright (C) 2018-2020 Intel Corporation
      6 */
      7
      8#ifndef _CRYPTO_OCS_AES_H
      9#define _CRYPTO_OCS_AES_H
     10
     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 hold
     37 *				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 data
     84 *			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#endif