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Padding more bytes than necessary one broke another variants of
PCIe RealTek chips. Only pad IP packets if the payload is less than 28 bytes. Obtained from: NetBSD PR: kern/122221
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commit
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=177771
@ -2171,7 +2171,7 @@ re_encap(sc, m_head)
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* offload is enabled, we always manually pad short frames out
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* to the minimum ethernet frame size.
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*/
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if ((*m_head)->m_pkthdr.len < RL_MIN_FRAMELEN &&
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if ((*m_head)->m_pkthdr.len < RL_IP4CSUMTX_PADLEN &&
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((*m_head)->m_pkthdr.csum_flags & CSUM_IP) != 0) {
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padlen = RL_MIN_FRAMELEN - (*m_head)->m_pkthdr.len;
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if (M_WRITABLE(*m_head) == 0) {
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@ -497,6 +497,12 @@
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#define RL_ETHER_ALIGN 2
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/*
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* re(4) hardware ip4csum-tx could be mangled with 28 bytes or less IP packets.
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*/
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#define RL_IP4CSUMTX_MINLEN 28
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#define RL_IP4CSUMTX_PADLEN (ETHER_HDR_LEN + RL_IP4CSUMTX_MINLEN)
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struct rl_chain_data {
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uint16_t cur_rx;
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uint8_t *rl_rx_buf;
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