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Fallback to software for more GCM and CCM requests.

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ccr(4) uses software to handle GCM and CCM requests not supported by
the crypto engine (e.g. with only AAD and no payload).  This change
adds a fallback for a few more requests such as those with more SGL
entries than can fit in a work request (this can happen for GCM when
decrypting a TLS record split across 15 or more packets).

Reported by:	Chelsio QA
Reviewed by:	np
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D26582
This commit is contained in:
John Baldwin 2020-09-29 21:51:32 +00:00
parent 3917c9ba65
commit 0e99339684
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=366269
1 changed files with 2 additions and 2 deletions
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4
sys/dev/cxgbe/crypto/t4_crypto.c
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@ -2777,7 +2777,7 @@ ccr_process(device_t dev, struct cryptop *crp, int hint)
return (0);
}
error = ccr_gcm(sc, s, crp);
if (error == EMSGSIZE) {
if (error == EMSGSIZE || error == EFBIG) {
counter_u64_add(sc->stats_sw_fallback, 1);
mtx_unlock(&s->lock);
ccr_gcm_soft(s, crp);
@ -2796,7 +2796,7 @@ ccr_process(device_t dev, struct cryptop *crp, int hint)
csp->csp_cipher_klen);
}
error = ccr_ccm(sc, s, crp);
if (error == EMSGSIZE) {
if (error == EMSGSIZE || error == EFBIG) {
counter_u64_add(sc->stats_sw_fallback, 1);
mtx_unlock(&s->lock);
ccr_ccm_soft(s, crp);