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/*
* Crypto acceleration support for Rockchip RK3288
*
* Copyright (c) 2015, Fuzhou Rockchip Electronics Co., Ltd
*
* Author: Zain Wang <zain.wang@rock-chips.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* Some ideas are from marvell/cesa.c and s5p-sss.c driver.
*/
#include "rk3288_crypto.h"
/*
* IC can not process zero message hash,
* so we put the fixed hash out when met zero message.
*/
static int zero_message_process(struct ahash_request *req)
{
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
int rk_digest_size = crypto_ahash_digestsize(tfm);
switch (rk_digest_size) {
case SHA1_DIGEST_SIZE:
memcpy(req->result, sha1_zero_message_hash, rk_digest_size);
break;
case SHA256_DIGEST_SIZE:
memcpy(req->result, sha256_zero_message_hash, rk_digest_size);
break;
case MD5_DIGEST_SIZE:
memcpy(req->result, md5_zero_message_hash, rk_digest_size);
break;
default:
return -EINVAL;
}
return 0;
}
static void rk_ahash_crypto_complete(struct crypto_async_request *base, int err)
{
if (base->complete)
base->complete(base, err);
}
static void rk_ahash_reg_init(struct rk_crypto_info *dev)
{
struct ahash_request *req = ahash_request_cast(dev->async_req);
struct rk_ahash_rctx *rctx = ahash_request_ctx(req);
int reg_status = 0;
reg_status = CRYPTO_READ(dev, RK_CRYPTO_CTRL) |
RK_CRYPTO_HASH_FLUSH | _SBF(0xffff, 16);
CRYPTO_WRITE(dev, RK_CRYPTO_CTRL, reg_status);
reg_status = CRYPTO_READ(dev, RK_CRYPTO_CTRL);
reg_status &= (~RK_CRYPTO_HASH_FLUSH);
reg_status |= _SBF(0xffff, 16);
CRYPTO_WRITE(dev, RK_CRYPTO_CTRL, reg_status);
memset_io(dev->reg + RK_CRYPTO_HASH_DOUT_0, 0, 32);
CRYPTO_WRITE(dev, RK_CRYPTO_INTENA, RK_CRYPTO_HRDMA_ERR_ENA |
RK_CRYPTO_HRDMA_DONE_ENA);
CRYPTO_WRITE(dev, RK_CRYPTO_INTSTS, RK_CRYPTO_HRDMA_ERR_INT |
RK_CRYPTO_HRDMA_DONE_INT);
CRYPTO_WRITE(dev, RK_CRYPTO_HASH_CTRL, rctx->mode |
RK_CRYPTO_HASH_SWAP_DO);
CRYPTO_WRITE(dev, RK_CRYPTO_CONF, RK_CRYPTO_BYTESWAP_HRFIFO |
RK_CRYPTO_BYTESWAP_BRFIFO |
RK_CRYPTO_BYTESWAP_BTFIFO);
CRYPTO_WRITE(dev, RK_CRYPTO_HASH_MSG_LEN, dev->total);
}
static int rk_ahash_init(struct ahash_request *req)
{
struct rk_ahash_rctx *rctx = ahash_request_ctx(req);
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
struct rk_ahash_ctx *ctx = crypto_ahash_ctx(tfm);
ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm);
rctx->fallback_req.base.flags = req->base.flags &
CRYPTO_TFM_REQ_MAY_SLEEP;
return crypto_ahash_init(&rctx->fallback_req);
}
static int rk_ahash_update(struct ahash_request *req)
{
struct rk_ahash_rctx *rctx = ahash_request_ctx(req);
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
struct rk_ahash_ctx *ctx = crypto_ahash_ctx(tfm);
ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm);
rctx->fallback_req.base.flags = req->base.flags &
CRYPTO_TFM_REQ_MAY_SLEEP;
rctx->fallback_req.nbytes = req->nbytes;
rctx->fallback_req.src = req->src;
return crypto_ahash_update(&rctx->fallback_req);
}
static int rk_ahash_final(struct ahash_request *req)
{
struct rk_ahash_rctx *rctx = ahash_request_ctx(req);
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
struct rk_ahash_ctx *ctx = crypto_ahash_ctx(tfm);
ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm);
rctx->fallback_req.base.flags = req->base.flags &
CRYPTO_TFM_REQ_MAY_SLEEP;
rctx->fallback_req.result = req->result;
return crypto_ahash_final(&rctx->fallback_req);
}
static int rk_ahash_finup(struct ahash_request *req)
{
struct rk_ahash_rctx *rctx = ahash_request_ctx(req);
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
struct rk_ahash_ctx *ctx = crypto_ahash_ctx(tfm);
ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm);
rctx->fallback_req.base.flags = req->base.flags &
CRYPTO_TFM_REQ_MAY_SLEEP;
rctx->fallback_req.nbytes = req->nbytes;
rctx->fallback_req.src = req->src;
rctx->fallback_req.result = req->result;
return crypto_ahash_finup(&rctx->fallback_req);
}
static int rk_ahash_import(struct ahash_request *req, const void *in)
{
struct rk_ahash_rctx *rctx = ahash_request_ctx(req);
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
struct rk_ahash_ctx *ctx = crypto_ahash_ctx(tfm);
ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm);
rctx->fallback_req.base.flags = req->base.flags &
CRYPTO_TFM_REQ_MAY_SLEEP;
return crypto_ahash_import(&rctx->fallback_req, in);
}
static int rk_ahash_export(struct ahash_request *req, void *out)
{
struct rk_ahash_rctx *rctx = ahash_request_ctx(req);
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
struct rk_ahash_ctx *ctx = crypto_ahash_ctx(tfm);
ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm);
rctx->fallback_req.base.flags = req->base.flags &
CRYPTO_TFM_REQ_MAY_SLEEP;
return crypto_ahash_export(&rctx->fallback_req, out);
}
static int rk_ahash_digest(struct ahash_request *req)
{
struct rk_ahash_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
struct rk_crypto_info *dev = tctx->dev;
if (!req->nbytes)
return zero_message_process(req);
else
return dev->enqueue(dev, &req->base);
}
static void crypto_ahash_dma_start(struct rk_crypto_info *dev)
{
CRYPTO_WRITE(dev, RK_CRYPTO_HRDMAS, dev->addr_in);
CRYPTO_WRITE(dev, RK_CRYPTO_HRDMAL, (dev->count + 3) / 4);
CRYPTO_WRITE(dev, RK_CRYPTO_CTRL, RK_CRYPTO_HASH_START |
(RK_CRYPTO_HASH_START << 16));
}
static int rk_ahash_set_data_start(struct rk_crypto_info *dev)
{
int err;
err = dev->load_data(dev, dev->sg_src, NULL);
if (!err)
crypto_ahash_dma_start(dev);
return err;
}
static int rk_ahash_start(struct rk_crypto_info *dev)
{
struct ahash_request *req = ahash_request_cast(dev->async_req);
struct crypto_ahash *tfm;
struct rk_ahash_rctx *rctx;
dev->total = req->nbytes;
dev->left_bytes = req->nbytes;
dev->aligned = 0;
dev->align_size = 4;
dev->sg_dst = NULL;
dev->sg_src = req->src;
dev->first = req->src;
dev->src_nents = sg_nents(req->src);
rctx = ahash_request_ctx(req);
rctx->mode = 0;
tfm = crypto_ahash_reqtfm(req);
switch (crypto_ahash_digestsize(tfm)) {
case SHA1_DIGEST_SIZE:
rctx->mode = RK_CRYPTO_HASH_SHA1;
break;
case SHA256_DIGEST_SIZE:
rctx->mode = RK_CRYPTO_HASH_SHA256;
break;
case MD5_DIGEST_SIZE:
rctx->mode = RK_CRYPTO_HASH_MD5;
break;
default:
return -EINVAL;
}
rk_ahash_reg_init(dev);
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