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crypto: inside-secure - improve error reporting 

This patch improves the error reporting from the Inside Secure driver to
the upper layers and crypto consumers. All errors reported by the engine
aren't fatal, and some may be genuine.

Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Antoine Tenart 2018-05-14 15:11:01 +02:00 committed by Herbert Xu
parent 8a21f067e0
commit bdfd190956
4 changed files with 27 additions and 11 deletions
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21
drivers/crypto/inside-secure/safexcel.c
View File

@ -537,6 +537,27 @@ finalize:
EIP197_HIA_CDR(priv, ring) + EIP197_HIA_xDR_PREP_COUNT);
}
inline int safexcel_rdesc_check_errors(struct safexcel_crypto_priv *priv,
struct safexcel_result_desc *rdesc)
{
if (likely(!rdesc->result_data.error_code))
return 0;
if (rdesc->result_data.error_code & 0x407f) {
/* Fatal error (bits 0-7, 14) */
dev_err(priv->dev,
"cipher: result: result descriptor error (%d)\n",
rdesc->result_data.error_code);
return -EIO;
} else if (rdesc->result_data.error_code == BIT(9)) {
/* Authentication failed */
return -EBADMSG;
}
/* All other non-fatal errors */
return -EINVAL;
}
void safexcel_complete(struct safexcel_crypto_priv *priv, int ring)
{
struct safexcel_command_desc *cdesc;

2
drivers/crypto/inside-secure/safexcel.h
View File

@ -610,6 +610,8 @@ struct safexcel_inv_result {
};
void safexcel_dequeue(struct safexcel_crypto_priv *priv, int ring);
int safexcel_rdesc_check_errors(struct safexcel_crypto_priv *priv,
struct safexcel_result_desc *rdesc);
void safexcel_complete(struct safexcel_crypto_priv *priv, int ring);
int safexcel_invalidate_cache(struct crypto_async_request *async,
struct safexcel_crypto_priv *priv,

8
drivers/crypto/inside-secure/safexcel_cipher.c
View File

@ -160,12 +160,8 @@ static int safexcel_handle_req_result(struct safexcel_crypto_priv *priv, int rin
break;
}
if (rdesc->result_data.error_code) {
dev_err(priv->dev,
"cipher: result: result descriptor error (%d)\n",
rdesc->result_data.error_code);
*ret = -EIO;
}
if (likely(!*ret))
*ret = safexcel_rdesc_check_errors(priv, rdesc);
ndesc++;
} while (!rdesc->last_seg);

7
drivers/crypto/inside-secure/safexcel_hash.c
View File

@ -146,11 +146,8 @@ static int safexcel_handle_req_result(struct safexcel_crypto_priv *priv, int rin
dev_err(priv->dev,
"hash: result: could not retrieve the result descriptor\n");
*ret = PTR_ERR(rdesc);
} else if (rdesc->result_data.error_code) {
dev_err(priv->dev,
"hash: result: result descriptor error (%d)\n",
rdesc->result_data.error_code);
*ret = -EINVAL;
} else {
*ret = safexcel_rdesc_check_errors(priv, rdesc);
}
safexcel_complete(priv, ring);