diff options
| author | Hans Petter Selasky <hselasky@FreeBSD.org> | 2014-09-22 08:27:27 +0000 |
|---|---|---|
| committer | Hans Petter Selasky <hselasky@FreeBSD.org> | 2014-09-22 08:27:27 +0000 |
| commit | 9fd573c39d61153ea00229a22d52293017a35a9e (patch) | |
| tree | 0022e54c289be9c8abb1f440ebe83025dce57741 /sys/dev/vmware | |
| parent | 2f872218e723d313dbbe8672788eae694d0d17ad (diff) | |
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.
Reviewed by: adrian, rmacklem
Sponsored by: Mellanox Technologies
MFC after: 1 week
Notes
svn path=/head/; revision=271946
Diffstat (limited to 'sys/dev/vmware')
| -rw-r--r-- | sys/dev/vmware/vmxnet3/if_vmx.c | 4 | ||||
| -rw-r--r-- | sys/dev/vmware/vmxnet3/if_vmxvar.h | 2 |
2 files changed, 3 insertions, 3 deletions
diff --git a/sys/dev/vmware/vmxnet3/if_vmx.c b/sys/dev/vmware/vmxnet3/if_vmx.c index f3fde92e3f7a..6abee77f564f 100644 --- a/sys/dev/vmware/vmxnet3/if_vmx.c +++ b/sys/dev/vmware/vmxnet3/if_vmx.c @@ -1722,7 +1722,9 @@ vmxnet3_setup_interface(struct vmxnet3_softc *sc) ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; ifp->if_init = vmxnet3_init; ifp->if_ioctl = vmxnet3_ioctl; - ifp->if_hw_tsomax = VMXNET3_TSO_MAXSIZE; + ifp->if_hw_tsomax = 65536 - (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN); + ifp->if_hw_tsomaxsegcount = VMXNET3_TX_MAXSEGS; + ifp->if_hw_tsomaxsegsize = VMXNET3_TX_MAXSEGSIZE; #ifdef VMXNET3_LEGACY_TX ifp->if_start = vmxnet3_start; diff --git a/sys/dev/vmware/vmxnet3/if_vmxvar.h b/sys/dev/vmware/vmxnet3/if_vmxvar.h index 6c797214b2ee..861351603e2b 100644 --- a/sys/dev/vmware/vmxnet3/if_vmxvar.h +++ b/sys/dev/vmware/vmxnet3/if_vmxvar.h @@ -277,8 +277,6 @@ struct vmxnet3_softc { */ #define VMXNET3_TX_MAXSEGS 32 #define VMXNET3_TX_MAXSIZE (VMXNET3_TX_MAXSEGS * MCLBYTES) -#define VMXNET3_TSO_MAXSIZE \ - (VMXNET3_TX_MAXSIZE - sizeof(struct ether_vlan_header)) /* * Maximum support Tx segments size. The length field in the |