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| author | Hans Petter Selasky <hselasky@FreeBSD.org> | 2014-09-13 08:26:09 +0000 |
|---|---|---|
| committer | Hans Petter Selasky <hselasky@FreeBSD.org> | 2014-09-13 08:26:09 +0000 |
| commit | eb93b77ae4a354370a1116d33522893cd1fbc1b3 (patch) | |
| tree | d34b1dd02c73734a9f41558066a1d389f2f3c6f8 /sys/net/if_vlan.c | |
| parent | abafbab15fb7ecadd0cd655caa672329369c9142 (diff) | |
| download | src-eb93b77ae4a354370a1116d33522893cd1fbc1b3.tar.gz src-eb93b77ae4a354370a1116d33522893cd1fbc1b3.zip | |
Improve transmit sending offload, TSO, algorithm in general.
The current TSO limitation feature only takes the total number of
bytes in an mbuf chain into account and does not limit by the number
of mbufs in a chain. Some kinds of hardware is limited by two
factors. One is the fragment length and the second is the fragment
count. Both of these limits need to be taken into account when doing
TSO. Else some kinds of hardware might have to drop completely valid
mbuf chains because they cannot loaded into the given hardware's DMA
engine. The new way of doing TSO limitation has been made backwards
compatible as input from other FreeBSD developers and will use
defaults for values not set.
MFC after: 1 week
Sponsored by: Mellanox Technologies
Notes
Notes:
svn path=/head/; revision=271504
Diffstat (limited to 'sys/net/if_vlan.c')
| -rw-r--r-- | sys/net/if_vlan.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sys/net/if_vlan.c b/sys/net/if_vlan.c index f551ffd618fc..fe2560c6fa7f 100644 --- a/sys/net/if_vlan.c +++ b/sys/net/if_vlan.c @@ -1511,8 +1511,8 @@ vlan_capabilities(struct ifvlan *ifv) * propagate the hardware-assisted flag. TSO on VLANs * does not necessarily require hardware VLAN tagging. */ - if (p->if_hw_tsomax > 0) - ifp->if_hw_tsomax = p->if_hw_tsomax; + ifp->if_hw_tsomax = if_hw_tsomax_common(ifp->if_hw_tsomax, + p->if_hw_tsomax); if (p->if_capabilities & IFCAP_VLAN_HWTSO) ifp->if_capabilities |= p->if_capabilities & IFCAP_TSO; if (p->if_capenable & IFCAP_VLAN_HWTSO) { |