// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2012-2019 ARM Limited (or its affiliates). */
#include <crypto/internal/aead.h>
#include <crypto/authenc.h>
#include <crypto/scatterwalk.h>
#include <linux/dmapool.h>
#include <linux/dma-mapping.h>
#include "cc_buffer_mgr.h"
#include "cc_lli_defs.h"
#include "cc_cipher.h"
#include "cc_hash.h"
#include "cc_aead.h"
union buffer_array_entry {
struct scatterlist *sgl;
dma_addr_t buffer_dma;
};
struct buffer_array {
unsigned int num_of_buffers;
union buffer_array_entry entry[MAX_NUM_OF_BUFFERS_IN_MLLI];
unsigned int offset[MAX_NUM_OF_BUFFERS_IN_MLLI];
int nents[MAX_NUM_OF_BUFFERS_IN_MLLI];
int total_data_len[MAX_NUM_OF_BUFFERS_IN_MLLI];
bool is_last[MAX_NUM_OF_BUFFERS_IN_MLLI];
u32 *mlli_nents[MAX_NUM_OF_BUFFERS_IN_MLLI];
};
static inline char *cc_dma_buf_type(enum cc_req_dma_buf_type type)
{
switch (type) {
case CC_DMA_BUF_NULL:
return "BUF_NULL";
case CC_DMA_BUF_DLLI:
return "BUF_DLLI";
case CC_DMA_BUF_MLLI:
return "BUF_MLLI";
default:
return "BUF_INVALID";
}
}
/**
* cc_copy_mac() - Copy MAC to temporary location
*
* @dev: device object
* @req: aead request object
* @dir: [IN] copy from/to sgl
*/
static void cc_copy_mac(struct device *dev, struct aead_request *req,
enum cc_sg_cpy_direct dir)
{
struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
u32 skip = req->assoclen + req->cryptlen;
cc_copy_sg_portion(dev, areq_ctx->backup_mac, req->src,
(skip - areq_ctx->req_authsize), skip, dir);
}
/**
* cc_get_sgl_nents() - Get scatterlist number of entries.
*
* @dev: Device object
* @sg_list: SG list
* @nbytes: [IN] Total SGL data bytes.
* @lbytes: [OUT] Returns the amount of bytes at the last entry
*
* Return:
* Number of entries in the scatterlist
*/
static unsigned int cc_get_sgl_nents(struct device *dev,
struct scatterlist *sg_list,
unsigned int nbytes, u32 *lbytes)
{
unsigned int nents = 0;
*lbytes = 0;
while (nbytes && sg_list) {
nents++;
/* get the number of bytes in the last entry */
*lbytes = nbytes;
nbytes -= (sg_list->length 