diff options
| -rw-r--r-- | sys/dev/sfxge/sfxge_tx.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/sys/dev/sfxge/sfxge_tx.c b/sys/dev/sfxge/sfxge_tx.c index 4e31aec..dd78e6e 100644 --- a/sys/dev/sfxge/sfxge_tx.c +++ b/sys/dev/sfxge/sfxge_tx.c @@ -363,8 +363,22 @@ static int sfxge_tx_queue_mbuf(struct sfxge_txq *txq, struct mbuf *mbuf) KASSERT(!txq->blocked, ("txq->blocked")); +#if SFXGE_TX_PARSE_EARLY + /* + * If software TSO is used, we still need to copy packet header, + * even if we have already parsed it early before enqueue. + */ + if ((mbuf->m_pkthdr.csum_flags & CSUM_TSO) && + (txq->tso_fw_assisted == 0)) + prefetch_read_many(mbuf->m_data); +#else + /* + * Prefetch packet header since we need to parse it and extract + * IP ID, TCP sequence number and flags. + */ if (mbuf->m_pkthdr.csum_flags & CSUM_TSO) prefetch_read_many(mbuf->m_data); +#endif if (__predict_false(txq->init_state != SFXGE_TXQ_STARTED)) { rc = EINTR; |
