diff options
| author | Antoine Ténart <antoine.tenart@free-electrons.com> | 2017-12-14 15:26:58 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-12-22 20:03:36 +1100 |
| commit | 871df319bd48acb4ce48b8985136c8ba40af3a02 (patch) | |
| tree | f35898cd8e88ae270e0a3f4ee9a3b6532eb0c8e3 /drivers/crypto/inside-secure/safexcel_cipher.c | |
| parent | 8732b298fa1cd266d8962d45109ba5cfa4212f37 (diff) | |
crypto: inside-secure - EIP97 support
The Inside Secure SafeXcel driver was firstly designed to support the
EIP197 cryptographic engine which is an evolution (with much more
feature, better performances) of the EIP97 cryptographic engine. This
patch convert the Inside Secure SafeXcel driver to support both engines
(EIP97 + EIP197).
The main differences are the register offsets and the context
invalidation process which is EIP197 specific. This patch adds an
indirection on the register offsets and adds checks not to send any
invalidation request when driving the EIP97. A new compatible is added
as well to bind the driver from device trees.
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/inside-secure/safexcel_cipher.c')
| -rw-r--r-- | drivers/crypto/inside-secure/safexcel_cipher.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/drivers/crypto/inside-secure/safexcel_cipher.c b/drivers/crypto/inside-secure/safexcel_cipher.c index 0e5cc230e49a..63a8768ed2ae 100644 --- a/drivers/crypto/inside-secure/safexcel_cipher.c +++ b/drivers/crypto/inside-secure/safexcel_cipher.c @@ -69,6 +69,7 @@ static int safexcel_aes_setkey(struct crypto_skcipher *ctfm, const u8 *key, { struct crypto_tfm *tfm = crypto_skcipher_tfm(ctfm); struct safexcel_cipher_ctx *ctx = crypto_tfm_ctx(tfm); + struct safexcel_crypto_priv *priv = ctx->priv; struct crypto_aes_ctx aes; int ret, i; @@ -78,7 +79,7 @@ static int safexcel_aes_setkey(struct crypto_skcipher *ctfm, const u8 *key, return ret; } - if (ctx->base.ctxr_dma) { + if (priv->version == EIP197 && ctx->base.ctxr_dma) { for (i = 0; i < len / sizeof(u32); i++) { if (ctx->key[i] != cpu_to_le32(aes.key_enc[i])) { ctx->base.needs_inv = true; @@ -411,9 +412,13 @@ static int safexcel_send(struct crypto_async_request *async, int *commands, int *results) { struct skcipher_request *req = skcipher_request_cast(async); + struct safexcel_cipher_ctx *ctx = crypto_tfm_ctx(req->base.tfm); struct safexcel_cipher_req *sreq = skcipher_request_ctx(req); + struct safexcel_crypto_priv *priv = ctx->priv; int ret; + BUG_ON(priv->version == EIP97 && sreq->needs_inv); + if (sreq->needs_inv) ret = safexcel_cipher_send_inv(async, ring, request, commands, results); @@ -476,7 +481,7 @@ static int safexcel_aes(struct skcipher_request *req, ctx->mode = mode; if (ctx->base.ctxr) { - if (ctx->base.needs_inv) { + if (priv->version == EIP197 && ctx->base.needs_inv) { sreq->needs_inv = true; ctx->base.needs_inv = false; } @@ -544,9 +549,14 @@ static void safexcel_skcipher_cra_exit(struct crypto_tfm *tfm) memzero_explicit(ctx->base.ctxr->data, 8 * sizeof(u32)); - ret = safexcel_cipher_exit_inv(tfm); - if (ret) - dev_warn(priv->dev, "cipher: invalidation error %d\n", ret); + if (priv->version == EIP197) { + ret = safexcel_cipher_exit_inv(tfm); + if (ret) + dev_warn(priv->dev, "cipher: invalidation error %d\n", ret); + } else { + dma_pool_free(priv->context_pool, ctx->base.ctxr, + ctx->base.ctxr_dma); + } } struct safexcel_alg_template safexcel_alg_ecb_aes = { |