From ab270e7055e0aa9d4dc3bf419cdfdde340174978 Mon Sep 17 00:00:00 2001 From: Russell King Date: Sun, 18 Oct 2015 17:24:47 +0100 Subject: [PATCH] crypto: marvell/cesa - rearrange handling for sw padded hashes Rearrange the last request handling for hashes which require software padding. We prepare the padding to be appended, and then append as much of the padding to any existing data that's already queued up, adding an operation block and launching the operation. Any remainder is then appended as a separate operation. This ensures that the hardware only ever sees multiples of the hash block size to be operated on for software padded hashes, thus ensuring that the engine always indicates that it has finished the calculation. Signed-off-by: Russell King Signed-off-by: Herbert Xu --- drivers/crypto/marvell/hash.c | 44 ++++++++++++++--------------------- 1 file changed, 18 insertions(+), 26 deletions(-) diff --git a/drivers/crypto/marvell/hash.c b/drivers/crypto/marvell/hash.c index d282716e0ca7..f4d5a7223560 100644 --- a/drivers/crypto/marvell/hash.c +++ b/drivers/crypto/marvell/hash.c @@ -559,38 +559,30 @@ mv_cesa_ahash_dma_last_req(struct mv_cesa_tdma_chain *chain, trailerlen = mv_cesa_ahash_pad_req(creq, ahashdreq->padding); - if (frag_len) { - op = mv_cesa_dma_add_frag(chain, &creq->op_tmpl, frag_len, - flags); - if (IS_ERR(op)) - return op; - } else { - op = NULL; - } - - if (op) { - len = min(CESA_SA_SRAM_PAYLOAD_SIZE - dma_iter->base.op_len, - trailerlen); - if (len) { - ret = mv_cesa_dma_add_data_transfer(chain, + len = min(CESA_SA_SRAM_PAYLOAD_SIZE - frag_len, trailerlen); + if (len) { + ret = mv_cesa_dma_add_data_transfer(chain, CESA_SA_DATA_SRAM_OFFSET + - dma_iter->base.op_len, + frag_len, ahashdreq->padding_dma, len, CESA_TDMA_DST_IN_SRAM, flags); - if (ret) - return ERR_PTR(ret); + if (ret) + return ERR_PTR(ret); - mv_cesa_update_op_cfg(op, CESA_SA_DESC_CFG_MID_FRAG, - CESA_SA_DESC_CFG_FRAG_MSK); - mv_cesa_set_mac_op_frag_len(op, - dma_iter->base.op_len + len); - padoff += len; - } - } + op = mv_cesa_dma_add_frag(chain, &creq->op_tmpl, frag_len + len, + flags); + if (IS_ERR(op)) + return op; - if (padoff >= trailerlen) - return op; + mv_cesa_update_op_cfg(op, CESA_SA_DESC_CFG_MID_FRAG, + CESA_SA_DESC_CFG_FRAG_MSK); + + if (len == trailerlen) + return op; + + padoff += len; + } if (!mv_cesa_mac_op_is_first_frag(&creq->op_tmpl)) mv_cesa_update_op_cfg(&creq->op_tmpl, -- 2.20.1