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@@ -0,0 +1,404 @@
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+/*
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+ * Crypto acceleration support for Rockchip RK3288
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+ *
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+ * Copyright (c) 2015, Fuzhou Rockchip Electronics Co., Ltd
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+ *
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+ * Author: Zain Wang <zain.wang@rock-chips.com>
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+ *
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms and conditions of the GNU General Public License,
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+ * version 2, as published by the Free Software Foundation.
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+ *
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+ * Some ideas are from marvell/cesa.c and s5p-sss.c driver.
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+ */
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+#include "rk3288_crypto.h"
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+
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+/*
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+ * IC can not process zero message hash,
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+ * so we put the fixed hash out when met zero message.
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+ */
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+
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+static int zero_message_process(struct ahash_request *req)
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+{
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+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
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+ int rk_digest_size = crypto_ahash_digestsize(tfm);
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+
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+ switch (rk_digest_size) {
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+ case SHA1_DIGEST_SIZE:
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+ memcpy(req->result, sha1_zero_message_hash, rk_digest_size);
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+ break;
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+ case SHA256_DIGEST_SIZE:
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+ memcpy(req->result, sha256_zero_message_hash, rk_digest_size);
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+ break;
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+ case MD5_DIGEST_SIZE:
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+ memcpy(req->result, md5_zero_message_hash, rk_digest_size);
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+ break;
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+ default:
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+ return -EINVAL;
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+ }
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+
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+ return 0;
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+}
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+
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+static void rk_ahash_crypto_complete(struct rk_crypto_info *dev, int err)
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+{
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+ if (dev->ahash_req->base.complete)
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+ dev->ahash_req->base.complete(&dev->ahash_req->base, err);
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+}
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+
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+static void rk_ahash_reg_init(struct rk_crypto_info *dev)
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+{
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+ int reg_status = 0;
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+
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+ reg_status = CRYPTO_READ(dev, RK_CRYPTO_CTRL) |
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+ RK_CRYPTO_HASH_FLUSH | _SBF(0xffff, 16);
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+ CRYPTO_WRITE(dev, RK_CRYPTO_CTRL, reg_status);
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+
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+ reg_status = CRYPTO_READ(dev, RK_CRYPTO_CTRL);
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+ reg_status &= (~RK_CRYPTO_HASH_FLUSH);
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+ reg_status |= _SBF(0xffff, 16);
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+ CRYPTO_WRITE(dev, RK_CRYPTO_CTRL, reg_status);
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+
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+ memset_io(dev->reg + RK_CRYPTO_HASH_DOUT_0, 0, 32);
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+
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+ CRYPTO_WRITE(dev, RK_CRYPTO_INTENA, RK_CRYPTO_HRDMA_ERR_ENA |
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+ RK_CRYPTO_HRDMA_DONE_ENA);
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+
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+ CRYPTO_WRITE(dev, RK_CRYPTO_INTSTS, RK_CRYPTO_HRDMA_ERR_INT |
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+ RK_CRYPTO_HRDMA_DONE_INT);
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+
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+ CRYPTO_WRITE(dev, RK_CRYPTO_HASH_CTRL, dev->mode |
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+ RK_CRYPTO_HASH_SWAP_DO);
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+
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+ CRYPTO_WRITE(dev, RK_CRYPTO_CONF, RK_CRYPTO_BYTESWAP_HRFIFO |
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+ RK_CRYPTO_BYTESWAP_BRFIFO |
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+ RK_CRYPTO_BYTESWAP_BTFIFO);
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+
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+ CRYPTO_WRITE(dev, RK_CRYPTO_HASH_MSG_LEN, dev->total);
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+}
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+
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+static int rk_ahash_init(struct ahash_request *req)
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+{
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+ struct rk_ahash_rctx *rctx = ahash_request_ctx(req);
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+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
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+ struct rk_ahash_ctx *ctx = crypto_ahash_ctx(tfm);
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+
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+ ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm);
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+ rctx->fallback_req.base.flags = req->base.flags &
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+ CRYPTO_TFM_REQ_MAY_SLEEP;
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+
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+ return crypto_ahash_init(&rctx->fallback_req);
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+}
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+
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+static int rk_ahash_update(struct ahash_request *req)
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+{
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+ struct rk_ahash_rctx *rctx = ahash_request_ctx(req);
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+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
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+ struct rk_ahash_ctx *ctx = crypto_ahash_ctx(tfm);
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+
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+ ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm);
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+ rctx->fallback_req.base.flags = req->base.flags &
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+ CRYPTO_TFM_REQ_MAY_SLEEP;
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+ rctx->fallback_req.nbytes = req->nbytes;
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+ rctx->fallback_req.src = req->src;
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+
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+ return crypto_ahash_update(&rctx->fallback_req);
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+}
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+
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+static int rk_ahash_final(struct ahash_request *req)
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+{
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+ struct rk_ahash_rctx *rctx = ahash_request_ctx(req);
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+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
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+ struct rk_ahash_ctx *ctx = crypto_ahash_ctx(tfm);
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+
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+ ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm);
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+ rctx->fallback_req.base.flags = req->base.flags &
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+ CRYPTO_TFM_REQ_MAY_SLEEP;
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+ rctx->fallback_req.result = req->result;
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+
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+ return crypto_ahash_final(&rctx->fallback_req);
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+}
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+
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+static int rk_ahash_finup(struct ahash_request *req)
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+{
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+ struct rk_ahash_rctx *rctx = ahash_request_ctx(req);
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+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
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+ struct rk_ahash_ctx *ctx = crypto_ahash_ctx(tfm);
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+
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+ ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm);
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+ rctx->fallback_req.base.flags = req->base.flags &
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+ CRYPTO_TFM_REQ_MAY_SLEEP;
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+
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+ rctx->fallback_req.nbytes = req->nbytes;
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+ rctx->fallback_req.src = req->src;
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+ rctx->fallback_req.result = req->result;
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+
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+ return crypto_ahash_finup(&rctx->fallback_req);
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+}
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+
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+static int rk_ahash_import(struct ahash_request *req, const void *in)
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+{
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+ struct rk_ahash_rctx *rctx = ahash_request_ctx(req);
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+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
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+ struct rk_ahash_ctx *ctx = crypto_ahash_ctx(tfm);
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+
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+ ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm);
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+ rctx->fallback_req.base.flags = req->base.flags &
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+ CRYPTO_TFM_REQ_MAY_SLEEP;
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+
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+ return crypto_ahash_import(&rctx->fallback_req, in);
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+}
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+
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+static int rk_ahash_export(struct ahash_request *req, void *out)
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+{
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+ struct rk_ahash_rctx *rctx = ahash_request_ctx(req);
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+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
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+ struct rk_ahash_ctx *ctx = crypto_ahash_ctx(tfm);
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+
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+ ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm);
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+ rctx->fallback_req.base.flags = req->base.flags &
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+ CRYPTO_TFM_REQ_MAY_SLEEP;
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+
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+ return crypto_ahash_export(&rctx->fallback_req, out);
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+}
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+
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+static int rk_ahash_digest(struct ahash_request *req)
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+{
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+ struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
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+ struct rk_ahash_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
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+ struct rk_crypto_info *dev = NULL;
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+ unsigned long flags;
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+ int ret;
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+
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+ if (!req->nbytes)
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+ return zero_message_process(req);
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+
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+ dev = tctx->dev;
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+ dev->total = req->nbytes;
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+ dev->left_bytes = req->nbytes;
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+ dev->aligned = 0;
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+ dev->mode = 0;
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+ dev->align_size = 4;
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+ dev->sg_dst = NULL;
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+ dev->sg_src = req->src;
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+ dev->first = req->src;
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+ dev->nents = sg_nents(req->src);
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+
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+ switch (crypto_ahash_digestsize(tfm)) {
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+ case SHA1_DIGEST_SIZE:
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+ dev->mode = RK_CRYPTO_HASH_SHA1;
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+ break;
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+ case SHA256_DIGEST_SIZE:
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+ dev->mode = RK_CRYPTO_HASH_SHA256;
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+ break;
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+ case MD5_DIGEST_SIZE:
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+ dev->mode = RK_CRYPTO_HASH_MD5;
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+ break;
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+ default:
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+ return -EINVAL;
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+ }
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+
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+ rk_ahash_reg_init(dev);
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+
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+ spin_lock_irqsave(&dev->lock, flags);
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+ ret = crypto_enqueue_request(&dev->queue, &req->base);
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+ spin_unlock_irqrestore(&dev->lock, flags);
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+
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+ tasklet_schedule(&dev->crypto_tasklet);
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+
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+ /*
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+ * it will take some time to process date after last dma transmission.
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+ *
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+ * waiting time is relative with the last date len,
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+ * so cannot set a fixed time here.
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+ * 10-50 makes system not call here frequently wasting
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+ * efficiency, and make it response quickly when dma
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+ * complete.
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+ */
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+ while (!CRYPTO_READ(dev, RK_CRYPTO_HASH_STS))
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+ usleep_range(10, 50);
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+
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+ memcpy_fromio(req->result, dev->reg + RK_CRYPTO_HASH_DOUT_0,
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+ crypto_ahash_digestsize(tfm));
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+
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+ return 0;
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+}
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+
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+static void crypto_ahash_dma_start(struct rk_crypto_info *dev)
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+{
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+ CRYPTO_WRITE(dev, RK_CRYPTO_HRDMAS, dev->addr_in);
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+ CRYPTO_WRITE(dev, RK_CRYPTO_HRDMAL, (dev->count + 3) / 4);
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+ CRYPTO_WRITE(dev, RK_CRYPTO_CTRL, RK_CRYPTO_HASH_START |
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+ (RK_CRYPTO_HASH_START << 16));
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+}
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+
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+static int rk_ahash_set_data_start(struct rk_crypto_info *dev)
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+{
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+ int err;
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+
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+ err = dev->load_data(dev, dev->sg_src, NULL);
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+ if (!err)
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+ crypto_ahash_dma_start(dev);
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+ return err;
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+}
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+
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+static int rk_ahash_start(struct rk_crypto_info *dev)
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+{
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+ return rk_ahash_set_data_start(dev);
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+}
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+
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+static int rk_ahash_crypto_rx(struct rk_crypto_info *dev)
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+{
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+ int err = 0;
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+
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+ dev->unload_data(dev);
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+ if (dev->left_bytes) {
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+ if (dev->aligned) {
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+ if (sg_is_last(dev->sg_src)) {
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+ dev_warn(dev->dev, "[%s:%d], Lack of data\n",
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+ __func__, __LINE__);
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+ err = -ENOMEM;
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+ goto out_rx;
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+ }
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+ dev->sg_src = sg_next(dev->sg_src);
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+ }
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+ err = rk_ahash_set_data_start(dev);
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+ } else {
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+ dev->complete(dev, 0);
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+ }
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+
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+out_rx:
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+ return err;
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+}
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+
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+static int rk_cra_hash_init(struct crypto_tfm *tfm)
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+{
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+ struct rk_ahash_ctx *tctx = crypto_tfm_ctx(tfm);
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+ struct rk_crypto_tmp *algt;
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+ struct ahash_alg *alg = __crypto_ahash_alg(tfm->__crt_alg);
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+
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+ const char *alg_name = crypto_tfm_alg_name(tfm);
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+
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+ algt = container_of(alg, struct rk_crypto_tmp, alg.hash);
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+
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+ tctx->dev = algt->dev;
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+ tctx->dev->addr_vir = (void *)__get_free_page(GFP_KERNEL);
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+ if (!tctx->dev->addr_vir) {
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+ dev_err(tctx->dev->dev, "failed to kmalloc for addr_vir\n");
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+ return -ENOMEM;
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+ }
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+ tctx->dev->start = rk_ahash_start;
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+ tctx->dev->update = rk_ahash_crypto_rx;
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+ tctx->dev->complete = rk_ahash_crypto_complete;
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+
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+ /* for fallback */
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+ tctx->fallback_tfm = crypto_alloc_ahash(alg_name, 0,
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+ CRYPTO_ALG_NEED_FALLBACK);
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+ if (IS_ERR(tctx->fallback_tfm)) {
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+ dev_err(tctx->dev->dev, "Could not load fallback driver.\n");
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+ return PTR_ERR(tctx->fallback_tfm);
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+ }
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+ crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
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+ sizeof(struct rk_ahash_rctx) +
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+ crypto_ahash_reqsize(tctx->fallback_tfm));
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+
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+ return tctx->dev->enable_clk(tctx->dev);
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+}
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+
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+static void rk_cra_hash_exit(struct crypto_tfm *tfm)
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+{
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+ struct rk_ahash_ctx *tctx = crypto_tfm_ctx(tfm);
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+
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+ free_page((unsigned long)tctx->dev->addr_vir);
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+ return tctx->dev->disable_clk(tctx->dev);
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+}
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+
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+struct rk_crypto_tmp rk_ahash_sha1 = {
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+ .type = ALG_TYPE_HASH,
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+ .alg.hash = {
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+ .init = rk_ahash_init,
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+ .update = rk_ahash_update,
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+ .final = rk_ahash_final,
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+ .finup = rk_ahash_finup,
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+ .export = rk_ahash_export,
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+ .import = rk_ahash_import,
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+ .digest = rk_ahash_digest,
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+ .halg = {
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+ .digestsize = SHA1_DIGEST_SIZE,
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+ .statesize = sizeof(struct sha1_state),
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+ .base = {
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+ .cra_name = "sha1",
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+ .cra_driver_name = "rk-sha1",
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+ .cra_priority = 300,
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+ .cra_flags = CRYPTO_ALG_ASYNC |
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+ CRYPTO_ALG_NEED_FALLBACK,
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+ .cra_blocksize = SHA1_BLOCK_SIZE,
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+ .cra_ctxsize = sizeof(struct rk_ahash_ctx),
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+ .cra_alignmask = 3,
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+ .cra_init = rk_cra_hash_init,
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+ .cra_exit = rk_cra_hash_exit,
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+ .cra_module = THIS_MODULE,
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+ }
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+ }
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+ }
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+};
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+
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+struct rk_crypto_tmp rk_ahash_sha256 = {
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+ .type = ALG_TYPE_HASH,
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+ .alg.hash = {
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+ .init = rk_ahash_init,
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+ .update = rk_ahash_update,
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+ .final = rk_ahash_final,
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+ .finup = rk_ahash_finup,
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+ .export = rk_ahash_export,
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+ .import = rk_ahash_import,
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+ .digest = rk_ahash_digest,
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+ .halg = {
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+ .digestsize = SHA256_DIGEST_SIZE,
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+ .statesize = sizeof(struct sha256_state),
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+ .base = {
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+ .cra_name = "sha256",
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+ .cra_driver_name = "rk-sha256",
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+ .cra_priority = 300,
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+ .cra_flags = CRYPTO_ALG_ASYNC |
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+ CRYPTO_ALG_NEED_FALLBACK,
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+ .cra_blocksize = SHA256_BLOCK_SIZE,
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+ .cra_ctxsize = sizeof(struct rk_ahash_ctx),
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+ .cra_alignmask = 3,
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+ .cra_init = rk_cra_hash_init,
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+ .cra_exit = rk_cra_hash_exit,
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+ .cra_module = THIS_MODULE,
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+};
|
|
|
+
|
|
|
+struct rk_crypto_tmp rk_ahash_md5 = {
|
|
|
+ .type = ALG_TYPE_HASH,
|
|
|
+ .alg.hash = {
|
|
|
+ .init = rk_ahash_init,
|
|
|
+ .update = rk_ahash_update,
|
|
|
+ .final = rk_ahash_final,
|
|
|
+ .finup = rk_ahash_finup,
|
|
|
+ .export = rk_ahash_export,
|
|
|
+ .import = rk_ahash_import,
|
|
|
+ .digest = rk_ahash_digest,
|
|
|
+ .halg = {
|
|
|
+ .digestsize = MD5_DIGEST_SIZE,
|
|
|
+ .statesize = sizeof(struct md5_state),
|
|
|
+ .base = {
|
|
|
+ .cra_name = "md5",
|
|
|
+ .cra_driver_name = "rk-md5",
|
|
|
+ .cra_priority = 300,
|
|
|
+ .cra_flags = CRYPTO_ALG_ASYNC |
|
|
|
+ CRYPTO_ALG_NEED_FALLBACK,
|
|
|
+ .cra_blocksize = SHA1_BLOCK_SIZE,
|
|
|
+ .cra_ctxsize = sizeof(struct rk_ahash_ctx),
|
|
|
+ .cra_alignmask = 3,
|
|
|
+ .cra_init = rk_cra_hash_init,
|
|
|
+ .cra_exit = rk_cra_hash_exit,
|
|
|
+ .cra_module = THIS_MODULE,
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+};
|