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| author | Gilad Ben-Yossef | 2017-04-23 11:26:12 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2017-04-28 12:17:54 +0200 |
| commit | a4d826b94a634e7319c212d8ab1d8cbcf783d0f2 (patch) | |
| tree | e00d77b3a5064b952ec28b259b6c3b16483896be /drivers/staging/ccree/ssi_cipher.c | |
| parent | staging: ccree: add skcipher support (diff) | |
| download | kernel-qcow2-linux-a4d826b94a634e7319c212d8ab1d8cbcf783d0f2.tar.gz kernel-qcow2-linux-a4d826b94a634e7319c212d8ab1d8cbcf783d0f2.tar.xz kernel-qcow2-linux-a4d826b94a634e7319c212d8ab1d8cbcf783d0f2.zip | |
staging: ccree: add IV generation support
Add CryptoCell IV hardware generation support.
This patch adds the needed support to drive the HW but does not expose
the ability via the kernel crypto API yet.
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/ccree/ssi_cipher.c')
| -rw-r--r-- | drivers/staging/ccree/ssi_cipher.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/staging/ccree/ssi_cipher.c b/drivers/staging/ccree/ssi_cipher.c index d22a1b30dbc6..4a95f1384e3f 100644 --- a/drivers/staging/ccree/ssi_cipher.c +++ b/drivers/staging/ccree/ssi_cipher.c @@ -819,6 +819,13 @@ static int ssi_blkcipher_process( areq, desc, &seq_len); + /* do we need to generate IV? */ + if (req_ctx->is_giv == true) { + ssi_req.ivgen_dma_addr[0] = req_ctx->gen_ctx.iv_dma_addr; + ssi_req.ivgen_dma_addr_len = 1; + /* set the IV size (8/16 B long)*/ + ssi_req.ivgen_size = ivsize; + } END_CYCLE_COUNT(ssi_req.op_type, STAT_PHASE_2); /* STAT_PHASE_3: Lock HW and push sequence */ @@ -901,6 +908,7 @@ static int ssi_sblkcipher_encrypt(struct blkcipher_desc *desc, unsigned int ivsize = crypto_blkcipher_ivsize(blk_tfm); req_ctx->backup_info = desc->info; + req_ctx->is_giv = false; return ssi_blkcipher_process(tfm, req_ctx, dst, src, nbytes, desc->info, ivsize, NULL, DRV_CRYPTO_DIRECTION_ENCRYPT); } @@ -916,6 +924,7 @@ static int ssi_sblkcipher_decrypt(struct blkcipher_desc *desc, unsigned int ivsize = crypto_blkcipher_ivsize(blk_tfm); req_ctx->backup_info = desc->info; + req_ctx->is_giv = false; return ssi_blkcipher_process(tfm, req_ctx, dst, src, nbytes, desc->info, ivsize, NULL, DRV_CRYPTO_DIRECTION_DECRYPT); } @@ -948,6 +957,7 @@ static int ssi_ablkcipher_encrypt(struct ablkcipher_request *req) unsigned int ivsize = crypto_ablkcipher_ivsize(ablk_tfm); req_ctx->backup_info = req->info; + req_ctx->is_giv = false; return ssi_blkcipher_process(tfm, req_ctx, req->dst, req->src, req->nbytes, req->info, ivsize, (void *)req, DRV_CRYPTO_DIRECTION_ENCRYPT); } @@ -960,6 +970,7 @@ static int ssi_ablkcipher_decrypt(struct ablkcipher_request *req) unsigned int ivsize = crypto_ablkcipher_ivsize(ablk_tfm); req_ctx->backup_info = req->info; + req_ctx->is_giv = false; return ssi_blkcipher_process(tfm, req_ctx, req->dst, req->src, req->nbytes, req->info, ivsize, (void *)req, DRV_CRYPTO_DIRECTION_DECRYPT); } |