mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-02 08:34:20 +08:00
8857433245
Add support for the AES/SM4 crypto engine included in the Offload and Crypto Subsystem (OCS) of the Intel Keem Bay SoC, thus enabling hardware-acceleration for the following transformations: - ecb(aes), cbc(aes), ctr(aes), cts(cbc(aes)), gcm(aes) and cbc(aes); supported for 128-bit and 256-bit keys. - ecb(sm4), cbc(sm4), ctr(sm4), cts(cbc(sm4)), gcm(sm4) and cbc(sm4); supported for 128-bit keys. The driver passes crypto manager self-tests, including the extra tests (CRYPTO_MANAGER_EXTRA_TESTS=y). Signed-off-by: Mike Healy <mikex.healy@intel.com> Co-developed-by: Daniele Alessandrelli <daniele.alessandrelli@intel.com> Signed-off-by: Daniele Alessandrelli <daniele.alessandrelli@intel.com> Acked-by: Mark Gross <mgross@linux.intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
130 lines
3.2 KiB
C
130 lines
3.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Intel Keem Bay OCS AES Crypto Driver.
|
|
*
|
|
* Copyright (C) 2018-2020 Intel Corporation
|
|
*/
|
|
|
|
#ifndef _CRYPTO_OCS_AES_H
|
|
#define _CRYPTO_OCS_AES_H
|
|
|
|
#include <linux/dma-mapping.h>
|
|
|
|
enum ocs_cipher {
|
|
OCS_AES = 0,
|
|
OCS_SM4 = 1,
|
|
};
|
|
|
|
enum ocs_mode {
|
|
OCS_MODE_ECB = 0,
|
|
OCS_MODE_CBC = 1,
|
|
OCS_MODE_CTR = 2,
|
|
OCS_MODE_CCM = 6,
|
|
OCS_MODE_GCM = 7,
|
|
OCS_MODE_CTS = 9,
|
|
};
|
|
|
|
enum ocs_instruction {
|
|
OCS_ENCRYPT = 0,
|
|
OCS_DECRYPT = 1,
|
|
OCS_EXPAND = 2,
|
|
OCS_BYPASS = 3,
|
|
};
|
|
|
|
/**
|
|
* struct ocs_aes_dev - AES device context.
|
|
* @list: List head for insertion into device list hold
|
|
* by driver.
|
|
* @dev: OCS AES device.
|
|
* @irq: IRQ number.
|
|
* @base_reg: IO base address of OCS AES.
|
|
* @irq_copy_completion: Completion to indicate IRQ has been triggered.
|
|
* @dma_err_mask: Error reported by OCS DMA interrupts.
|
|
* @engine: Crypto engine for the device.
|
|
*/
|
|
struct ocs_aes_dev {
|
|
struct list_head list;
|
|
struct device *dev;
|
|
int irq;
|
|
void __iomem *base_reg;
|
|
struct completion irq_completion;
|
|
u32 dma_err_mask;
|
|
struct crypto_engine *engine;
|
|
};
|
|
|
|
/**
|
|
* struct ocs_dll_desc - Descriptor of an OCS DMA Linked List.
|
|
* @vaddr: Virtual address of the linked list head.
|
|
* @dma_addr: DMA address of the linked list head.
|
|
* @size: Size (in bytes) of the linked list.
|
|
*/
|
|
struct ocs_dll_desc {
|
|
void *vaddr;
|
|
dma_addr_t dma_addr;
|
|
size_t size;
|
|
};
|
|
|
|
int ocs_aes_set_key(struct ocs_aes_dev *aes_dev, const u32 key_size,
|
|
const u8 *key, const enum ocs_cipher cipher);
|
|
|
|
int ocs_aes_op(struct ocs_aes_dev *aes_dev,
|
|
enum ocs_mode mode,
|
|
enum ocs_cipher cipher,
|
|
enum ocs_instruction instruction,
|
|
dma_addr_t dst_dma_list,
|
|
dma_addr_t src_dma_list,
|
|
u32 src_size,
|
|
u8 *iv,
|
|
u32 iv_size);
|
|
|
|
/**
|
|
* ocs_aes_bypass_op() - Use OCS DMA to copy data.
|
|
* @aes_dev: The OCS AES device to use.
|
|
* @dst_dma_list: The OCS DMA list mapping the memory where input data
|
|
* will be copied to.
|
|
* @src_dma_list: The OCS DMA list mapping input data.
|
|
* @src_size: The amount of data to copy.
|
|
*/
|
|
static inline int ocs_aes_bypass_op(struct ocs_aes_dev *aes_dev,
|
|
dma_addr_t dst_dma_list,
|
|
dma_addr_t src_dma_list, u32 src_size)
|
|
{
|
|
return ocs_aes_op(aes_dev, OCS_MODE_ECB, OCS_AES, OCS_BYPASS,
|
|
dst_dma_list, src_dma_list, src_size, NULL, 0);
|
|
}
|
|
|
|
int ocs_aes_gcm_op(struct ocs_aes_dev *aes_dev,
|
|
enum ocs_cipher cipher,
|
|
enum ocs_instruction instruction,
|
|
dma_addr_t dst_dma_list,
|
|
dma_addr_t src_dma_list,
|
|
u32 src_size,
|
|
const u8 *iv,
|
|
dma_addr_t aad_dma_list,
|
|
u32 aad_size,
|
|
u8 *out_tag,
|
|
u32 tag_size);
|
|
|
|
int ocs_aes_ccm_op(struct ocs_aes_dev *aes_dev,
|
|
enum ocs_cipher cipher,
|
|
enum ocs_instruction instruction,
|
|
dma_addr_t dst_dma_list,
|
|
dma_addr_t src_dma_list,
|
|
u32 src_size,
|
|
u8 *iv,
|
|
dma_addr_t adata_dma_list,
|
|
u32 adata_size,
|
|
u8 *in_tag,
|
|
u32 tag_size);
|
|
|
|
int ocs_create_linked_list_from_sg(const struct ocs_aes_dev *aes_dev,
|
|
struct scatterlist *sg,
|
|
int sg_dma_count,
|
|
struct ocs_dll_desc *dll_desc,
|
|
size_t data_size,
|
|
size_t data_offset);
|
|
|
|
irqreturn_t ocs_aes_irq_handler(int irq, void *dev_id);
|
|
|
|
#endif
|