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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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d03f7b0d58
This patch adds support to the GCM mode. Signed-off-by: Ryder Lee <ryder.lee@mediatek.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
232 lines
6.0 KiB
C
232 lines
6.0 KiB
C
/*
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* Driver for EIP97 cryptographic accelerator.
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*
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* Copyright (c) 2016 Ryder Lee <ryder.lee@mediatek.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#ifndef __MTK_PLATFORM_H_
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#define __MTK_PLATFORM_H_
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#include <crypto/algapi.h>
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#include <crypto/internal/aead.h>
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#include <crypto/internal/hash.h>
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#include <crypto/scatterwalk.h>
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#include <crypto/skcipher.h>
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#include <linux/crypto.h>
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#include <linux/dma-mapping.h>
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#include <linux/interrupt.h>
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#include <linux/scatterlist.h>
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#include "mtk-regs.h"
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#define MTK_RDR_PROC_THRESH BIT(0)
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#define MTK_RDR_PROC_MODE BIT(23)
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#define MTK_CNT_RST BIT(31)
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#define MTK_IRQ_RDR0 BIT(1)
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#define MTK_IRQ_RDR1 BIT(3)
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#define MTK_IRQ_RDR2 BIT(5)
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#define MTK_IRQ_RDR3 BIT(7)
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#define SIZE_IN_WORDS(x) ((x) >> 2)
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/**
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* Ring 0/1 are used by AES encrypt and decrypt.
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* Ring 2/3 are used by SHA.
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*/
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enum {
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RING0 = 0,
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RING1,
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RING2,
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RING3,
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RING_MAX,
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};
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#define MTK_REC_NUM (RING_MAX / 2)
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#define MTK_IRQ_NUM 5
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/**
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* struct mtk_desc - DMA descriptor
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* @hdr: the descriptor control header
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* @buf: DMA address of input buffer segment
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* @ct: DMA address of command token that control operation flow
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* @ct_hdr: the command token control header
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* @tag: the user-defined field
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* @tfm: DMA address of transform state
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* @bound: align descriptors offset boundary
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*
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* Structure passed to the crypto engine to describe where source
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* data needs to be fetched and how it needs to be processed.
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*/
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struct mtk_desc {
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__le32 hdr;
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__le32 buf;
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__le32 ct;
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__le32 ct_hdr;
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__le32 tag;
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__le32 tfm;
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__le32 bound[2];
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};
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#define MTK_DESC_NUM 512
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#define MTK_DESC_OFF SIZE_IN_WORDS(sizeof(struct mtk_desc))
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#define MTK_DESC_SZ (MTK_DESC_OFF - 2)
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#define MTK_DESC_RING_SZ ((sizeof(struct mtk_desc) * MTK_DESC_NUM))
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#define MTK_DESC_CNT(x) ((MTK_DESC_OFF * (x)) << 2)
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#define MTK_DESC_LAST cpu_to_le32(BIT(22))
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#define MTK_DESC_FIRST cpu_to_le32(BIT(23))
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#define MTK_DESC_BUF_LEN(x) cpu_to_le32(x)
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#define MTK_DESC_CT_LEN(x) cpu_to_le32((x) << 24)
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/**
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* struct mtk_ring - Descriptor ring
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* @cmd_base: pointer to command descriptor ring base
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* @cmd_dma: DMA address of command descriptor ring
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* @cmd_pos: current position in the command descriptor ring
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* @res_base: pointer to result descriptor ring base
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* @res_dma: DMA address of result descriptor ring
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* @res_pos: current position in the result descriptor ring
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*
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* A descriptor ring is a circular buffer that is used to manage
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* one or more descriptors. There are two type of descriptor rings;
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* the command descriptor ring and result descriptor ring.
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*/
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struct mtk_ring {
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struct mtk_desc *cmd_base;
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dma_addr_t cmd_dma;
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u32 cmd_pos;
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struct mtk_desc *res_base;
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dma_addr_t res_dma;
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u32 res_pos;
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};
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/**
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* struct mtk_aes_dma - Structure that holds sg list info
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* @sg: pointer to scatter-gather list
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* @nents: number of entries in the sg list
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* @remainder: remainder of sg list
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* @sg_len: number of entries in the sg mapped list
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*/
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struct mtk_aes_dma {
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struct scatterlist *sg;
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int nents;
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u32 remainder;
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u32 sg_len;
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};
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struct mtk_aes_base_ctx;
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struct mtk_aes_rec;
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struct mtk_cryp;
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typedef int (*mtk_aes_fn)(struct mtk_cryp *cryp, struct mtk_aes_rec *aes);
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/**
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* struct mtk_aes_rec - AES operation record
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* @queue: crypto request queue
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* @areq: pointer to async request
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* @task: the tasklet is use in AES interrupt
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* @ctx: pointer to current context
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* @src: the structure that holds source sg list info
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* @dst: the structure that holds destination sg list info
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* @aligned_sg: the scatter list is use to alignment
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* @real_dst: pointer to the destination sg list
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* @resume: pointer to resume function
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* @total: request buffer length
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* @buf: pointer to page buffer
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* @id: record identification
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* @flags: it's describing AES operation state
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* @lock: the async queue lock
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*
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* Structure used to record AES execution state.
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*/
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struct mtk_aes_rec {
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struct crypto_queue queue;
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struct crypto_async_request *areq;
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struct tasklet_struct task;
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struct mtk_aes_base_ctx *ctx;
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struct mtk_aes_dma src;
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struct mtk_aes_dma dst;
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struct scatterlist aligned_sg;
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struct scatterlist *real_dst;
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mtk_aes_fn resume;
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size_t total;
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void *buf;
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u8 id;
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unsigned long flags;
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/* queue lock */
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spinlock_t lock;
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};
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/**
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* struct mtk_sha_rec - SHA operation record
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* @queue: crypto request queue
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* @req: pointer to ahash request
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* @task: the tasklet is use in SHA interrupt
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* @id: record identification
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* @flags: it's describing SHA operation state
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* @lock: the ablkcipher queue lock
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*
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* Structure used to record SHA execution state.
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*/
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struct mtk_sha_rec {
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struct crypto_queue queue;
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struct ahash_request *req;
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struct tasklet_struct task;
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u8 id;
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unsigned long flags;
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/* queue lock */
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spinlock_t lock;
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};
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/**
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* struct mtk_cryp - Cryptographic device
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* @base: pointer to mapped register I/O base
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* @dev: pointer to device
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* @clk_ethif: pointer to ethif clock
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* @clk_cryp: pointer to crypto clock
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* @irq: global system and rings IRQ
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* @ring: pointer to execution state of AES
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* @aes: pointer to execution state of SHA
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* @sha: each execution record map to a ring
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* @aes_list: device list of AES
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* @sha_list: device list of SHA
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* @tmp: pointer to temporary buffer for internal use
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* @tmp_dma: DMA address of temporary buffer
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* @rec: it's used to select SHA record for tfm
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*
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* Structure storing cryptographic device information.
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*/
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struct mtk_cryp {
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void __iomem *base;
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struct device *dev;
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struct clk *clk_ethif;
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struct clk *clk_cryp;
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int irq[MTK_IRQ_NUM];
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struct mtk_ring *ring[RING_MAX];
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struct mtk_aes_rec *aes[MTK_REC_NUM];
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struct mtk_sha_rec *sha[MTK_REC_NUM];
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struct list_head aes_list;
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struct list_head sha_list;
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void *tmp;
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dma_addr_t tmp_dma;
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bool rec;
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};
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int mtk_cipher_alg_register(struct mtk_cryp *cryp);
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void mtk_cipher_alg_release(struct mtk_cryp *cryp);
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int mtk_hash_alg_register(struct mtk_cryp *cryp);
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void mtk_hash_alg_release(struct mtk_cryp *cryp);
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#endif /* __MTK_PLATFORM_H_ */
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