diff options
| author | Antoine Ténart <antoine.tenart@free-electrons.com> | 2017-12-14 15:26:46 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-12-22 20:03:29 +1100 |
| commit | cc75f5ce82cc52a1c152fa22ea8c172d84fb5bdf (patch) | |
| tree | f8436cb4a277ec1eb7fd9f7fdcfc3679b0fa7369 /drivers | |
| parent | 60310eae7dc12182e8901a41e0ba885aaac0b542 (diff) | |
crypto: inside-secure - comment the caching function
Cosmetic patch adding a few comments to the ahash caching function to
understand easily what calculations are made in the functions; and how
the function is working.
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/crypto/inside-secure/safexcel_hash.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/crypto/inside-secure/safexcel_hash.c b/drivers/crypto/inside-secure/safexcel_hash.c index ac922b91b2d7..e53e6b2331db 100644 --- a/drivers/crypto/inside-secure/safexcel_hash.c +++ b/drivers/crypto/inside-secure/safexcel_hash.c @@ -484,13 +484,23 @@ static int safexcel_ahash_exit_inv(struct crypto_tfm *tfm) return 0; } +/* safexcel_ahash_cache: cache data until at least one request can be sent to + * the engine, aka. when there is at least 1 block size in the pipe. + */ static int safexcel_ahash_cache(struct ahash_request *areq) { struct safexcel_ahash_req *req = ahash_request_ctx(areq); struct crypto_ahash *ahash = crypto_ahash_reqtfm(areq); int queued, cache_len; + /* cache_len: everyting accepted by the driver but not sent yet, + * tot sz handled by update() - last req sz - tot sz handled by send() + */ cache_len = req->len - areq->nbytes - req->processed; + /* queued: everything accepted by the driver which will be handled by + * the next send() calls. + * tot sz handled by update() - tot sz handled by send() + */ queued = req->len - req->processed; /* |