diff options
Diffstat (limited to 'sys/dev/re')
| -rw-r--r-- | sys/dev/re/if_re.c | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/sys/dev/re/if_re.c b/sys/dev/re/if_re.c index 85e6452..a4527a6 100644 --- a/sys/dev/re/if_re.c +++ b/sys/dev/re/if_re.c @@ -2167,16 +2167,12 @@ re_encap(sc, m_head) * need to send a really small IP fragment that's less than 60 * bytes in size, and IP header checksumming is enabled, the * resulting ethernet frame that appears on the wire will - * have garbled payload. To work around this, if TX checksum + * have garbled payload. To work around this, if TX IP checksum * offload is enabled, we always manually pad short frames out * to the minimum ethernet frame size. - * - * Note: this appears unnecessary for TCP, and doing it for TCP - * with PCIe adapters seems to result in bad checksums. */ - if ((*m_head)->m_pkthdr.csum_flags & (CSUM_IP | CSUM_UDP) && - ((*m_head)->m_pkthdr.csum_flags & CSUM_TCP) == 0 && - (*m_head)->m_pkthdr.len < RL_MIN_FRAMELEN) { + if ((*m_head)->m_pkthdr.len < RL_MIN_FRAMELEN && + ((*m_head)->m_pkthdr.csum_flags & CSUM_IP) != 0) { padlen = RL_MIN_FRAMELEN - (*m_head)->m_pkthdr.len; if (M_WRITABLE(*m_head) == 0) { /* Get a writable copy. */ @@ -2257,12 +2253,18 @@ re_encap(sc, m_head) ((uint32_t)(*m_head)->m_pkthdr.tso_segsz << RL_TDESC_CMD_MSSVAL_SHIFT); else { - if ((*m_head)->m_pkthdr.csum_flags & CSUM_IP) + /* + * Unconditionally enable IP checksum if TCP or UDP + * checksum is required. Otherwise, TCP/UDP checksum + * does't make effects. + */ + if (((*m_head)->m_pkthdr.csum_flags & RE_CSUM_FEATURES) != 0) { csum_flags |= RL_TDESC_CMD_IPCSUM; - if ((*m_head)->m_pkthdr.csum_flags & CSUM_TCP) - csum_flags |= RL_TDESC_CMD_TCPCSUM; - if ((*m_head)->m_pkthdr.csum_flags & CSUM_UDP) - csum_flags |= RL_TDESC_CMD_UDPCSUM; + if (((*m_head)->m_pkthdr.csum_flags & CSUM_TCP) != 0) + csum_flags |= RL_TDESC_CMD_TCPCSUM; + if (((*m_head)->m_pkthdr.csum_flags & CSUM_UDP) != 0) + csum_flags |= RL_TDESC_CMD_UDPCSUM; + } } /* |
