Date: Thu, 1 Nov 2012 05:39:21 +0000 (UTC) From: Pyun YongHyeon <yongari@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r242425 - head/sys/dev/ti Message-ID: <201211010539.qA15dLjs026526@svn.freebsd.org>
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Author: yongari Date: Thu Nov 1 05:39:21 2012 New Revision: 242425 URL: http://svn.freebsd.org/changeset/base/242425 Log: Remove TCP/UDP checksum offloading feature for IP fragmented datagrams. Traditionally upper stack fragmented packets without computing TCP/UDP checksum and these datagrams were passed to driver. But there are chances that other packets slip into the interface queue in SMP world. If this happens firmware running on MIPS 4000 processor in the controller would see mixed packets and it shall send out corrupted packets. While I'm here simplify checksum offloading setup. MFC After: 1 week Modified: head/sys/dev/ti/if_ti.c Modified: head/sys/dev/ti/if_ti.c ============================================================================== --- head/sys/dev/ti/if_ti.c Thu Nov 1 04:07:08 2012 (r242424) +++ head/sys/dev/ti/if_ti.c Thu Nov 1 05:39:21 2012 (r242425) @@ -127,7 +127,7 @@ __FBSDID("$FreeBSD$"); #include <sys/sysctl.h> -#define TI_CSUM_FEATURES (CSUM_IP | CSUM_TCP | CSUM_UDP | CSUM_IP_FRAGS) +#define TI_CSUM_FEATURES (CSUM_IP | CSUM_TCP | CSUM_UDP) /* * We can only turn on header splitting if we're using extended receive * BDs. @@ -3082,16 +3082,10 @@ ti_encap(struct ti_softc *sc, struct mbu m = *m_head; csum_flags = 0; - if (m->m_pkthdr.csum_flags) { - if (m->m_pkthdr.csum_flags & CSUM_IP) - csum_flags |= TI_BDFLAG_IP_CKSUM; - if (m->m_pkthdr.csum_flags & (CSUM_TCP | CSUM_UDP)) - csum_flags |= TI_BDFLAG_TCP_UDP_CKSUM; - if (m->m_flags & M_LASTFRAG) - csum_flags |= TI_BDFLAG_IP_FRAG_END; - else if (m->m_flags & M_FRAG) - csum_flags |= TI_BDFLAG_IP_FRAG; - } + if (m->m_pkthdr.csum_flags & CSUM_IP) + csum_flags |= TI_BDFLAG_IP_CKSUM; + if (m->m_pkthdr.csum_flags & (CSUM_TCP | CSUM_UDP)) + csum_flags |= TI_BDFLAG_TCP_UDP_CKSUM; frag = sc->ti_tx_saved_prodidx; for (i = 0; i < nseg; i++) {
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