[PATCH v2 4/7] crypto:chelsio:Use x8_ble gf multiplication to calculate IV.

[Harsh Jain]

gf128mul_x8_ble() will reduce gf Multiplication iteration by 8.

Signed-off-by: Harsh Jain <ha...@chelsio.com>
---
 drivers/crypto/chelsio/chcr_algo.c   | 11 +++++++++--
 drivers/crypto/chelsio/chcr_crypto.h |  1 +
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/chelsio/chcr_algo.c 
b/drivers/crypto/chelsio/chcr_algo.c
index e4bf32d..e0ab34a 100644
--- a/drivers/crypto/chelsio/chcr_algo.c
+++ b/drivers/crypto/chelsio/chcr_algo.c
@@ -888,9 +888,11 @@ static int chcr_update_tweak(struct ablkcipher_request 
*req, u8 *iv)
        int ret, i;
        u8 *key;
        unsigned int keylen;
+       int round = reqctx->last_req_len / AES_BLOCK_SIZE;
+       int round8 = round / 8;
 
        cipher = ablkctx->aes_generic;
-       memcpy(iv, req->info, AES_BLOCK_SIZE);
+       memcpy(iv, reqctx->iv, AES_BLOCK_SIZE);
 
        keylen = ablkctx->enckey_len / 2;
        key = ablkctx->key + keylen;
@@ -899,7 +901,10 @@ static int chcr_update_tweak(struct ablkcipher_request 
*req, u8 *iv)
                goto out;
 
        crypto_cipher_encrypt_one(cipher, iv, iv);
-       for (i = 0; i < (reqctx->processed / AES_BLOCK_SIZE); i++)
+       for (i = 0; i < round8; i++)
+               gf128mul_x8_ble((le128 *)iv, (le128 *)iv);
+
+       for (i = 0; i < (round % 8); i++)
                gf128mul_x_ble((le128 *)iv, (le128 *)iv);
 
        crypto_cipher_decrypt_one(cipher, iv, iv);
@@ -1040,6 +1045,7 @@ static int chcr_handle_cipher_resp(struct 
ablkcipher_request *req,
            CRYPTO_ALG_SUB_TYPE_CTR)
                bytes = adjust_ctr_overflow(reqctx->iv, bytes);
        reqctx->processed += bytes;
+       reqctx->last_req_len = bytes;
        wrparam.qid = u_ctx->lldi.rxq_ids[ctx->rx_qidx];
        wrparam.req = req;
        wrparam.bytes = bytes;
@@ -1132,6 +1138,7 @@ static int process_cipher(struct ablkcipher_request *req,
                goto error;
        }
        reqctx->processed = bytes;
+       reqctx->last_req_len = bytes;
        reqctx->dst = reqctx->dstsg;
        reqctx->op = op_type;
        wrparam.qid = qid;
diff --git a/drivers/crypto/chelsio/chcr_crypto.h 
b/drivers/crypto/chelsio/chcr_crypto.h
index 30af1ee..b3722b3 100644
--- a/drivers/crypto/chelsio/chcr_crypto.h
+++ b/drivers/crypto/chelsio/chcr_crypto.h
@@ -247,6 +247,7 @@ struct chcr_blkcipher_req_ctx {
        struct scatterlist *dst;
        struct scatterlist *newdstsg;
        unsigned int processed;
+       unsigned int last_req_len;
        unsigned int op;
        short int dst_nents;
        u8 iv[CHCR_MAX_CRYPTO_IV_LEN];
-- 
2.1.4