diff options
| author | Ayush Sawal | 2020-02-24 09:12:32 +0530 |
|---|---|---|
| committer | Herbert Xu | 2020-03-06 12:28:20 +1100 |
| commit | bed44d0c05d8efdda1ae98b1c7aa7b116abeadb2 (patch) | |
| tree | 953364de01ee82a50496516a75a1ef8b0acb0c64 /drivers/crypto | |
| parent | 1b44f93eb3e51f97d06a92eb39ab1ad031851f74 (diff) | |
crypto: chelsio - Recalculate iv only if it is needed
Recalculate iv only if it is needed i.e. if the last req to hw
was partial for aes-xts.
Signed-off-by: Ayush Sawal <ayush.sawal@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/chelsio/chcr_algo.c | 12 | ||||
| -rw-r--r-- | drivers/crypto/chelsio/chcr_crypto.h | 1 |
2 files changed, 11 insertions, 2 deletions
diff --git a/drivers/crypto/chelsio/chcr_algo.c b/drivers/crypto/chelsio/chcr_algo.c index 96c1b5fc9081..17ce6970dab4 100644 --- a/drivers/crypto/chelsio/chcr_algo.c +++ b/drivers/crypto/chelsio/chcr_algo.c @@ -1086,8 +1086,12 @@ static int chcr_final_cipher_iv(struct skcipher_request *req, if (subtype == CRYPTO_ALG_SUB_TYPE_CTR) ctr_add_iv(iv, req->iv, DIV_ROUND_UP(reqctx->processed, AES_BLOCK_SIZE)); - else if (subtype == CRYPTO_ALG_SUB_TYPE_XTS) - ret = chcr_update_tweak(req, iv, 1); + else if (subtype == CRYPTO_ALG_SUB_TYPE_XTS) { + if (!reqctx->partial_req) + memcpy(iv, reqctx->iv, AES_BLOCK_SIZE); + else + ret = chcr_update_tweak(req, iv, 1); + } else if (subtype == CRYPTO_ALG_SUB_TYPE_CBC) { /*Already updated for Decrypt*/ if (!reqctx->op) @@ -1199,6 +1203,7 @@ static int process_cipher(struct skcipher_request *req, int bytes, err = -EINVAL; reqctx->processed = 0; + reqctx->partial_req = 0; if (!req->iv) goto error; if ((ablkctx->enckey_len == 0) || (ivsize > AES_BLOCK_SIZE) || @@ -1289,6 +1294,7 @@ static int process_cipher(struct skcipher_request *req, } reqctx->processed = bytes; reqctx->last_req_len = bytes; + reqctx->partial_req = !!(req->cryptlen - reqctx->processed); return 0; unmap: @@ -1300,6 +1306,7 @@ error: static int chcr_aes_encrypt(struct skcipher_request *req) { struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct chcr_skcipher_req_ctx *reqctx = skcipher_request_ctx(req); struct chcr_context *ctx; struct chcr_dev *dev = c_ctx(tfm)->dev; struct sk_buff *skb = NULL; @@ -1329,6 +1336,7 @@ static int chcr_aes_encrypt(struct skcipher_request *req) CRYPTO_ALG_SUB_TYPE_CBC && req->base.flags == CRYPTO_TFM_REQ_MAY_SLEEP ) { ctx=c_ctx(tfm); + reqctx->partial_req = 1; wait_for_completion(&ctx->cbc_aes_aio_done); } return isfull ? -EBUSY : -EINPROGRESS; diff --git a/drivers/crypto/chelsio/chcr_crypto.h b/drivers/crypto/chelsio/chcr_crypto.h index 9207d88c5538..dbb7e13bb409 100644 --- a/drivers/crypto/chelsio/chcr_crypto.h +++ b/drivers/crypto/chelsio/chcr_crypto.h @@ -291,6 +291,7 @@ struct chcr_skcipher_req_ctx { struct scatterlist *dstsg; unsigned int processed; unsigned int last_req_len; + unsigned int partial_req; struct scatterlist *srcsg; unsigned int src_ofst; unsigned int dst_ofst; |