| #
e682d02e |
| 17-Aug-2012 |
Navdeep Parhar <np@FreeBSD.org> |
Support for TCP DDP (Direct Data Placement) in the T4 TOE module.
Basically, this is automatic rx zero copy when feasible. TCP payload is
DMA'd directly into the userspace buffer described by the u
Support for TCP DDP (Direct Data Placement) in the T4 TOE module.
Basically, this is automatic rx zero copy when feasible. TCP payload is
DMA'd directly into the userspace buffer described by the uio submitted
in soreceive by an application.
- Works with sockets that are being handled by the TCP offload engine
of a T4 chip (you need t4_tom.ko module loaded after cxgbe, and an
"ifconfig +toe" on the cxgbe interface).
- Does not require any modification to the application.
- Not enabled by default. Use hw.t4nex.<X>.toe.ddp="1" to enable it.
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| #
ae11e5c9 |
| 15-Aug-2012 |
Navdeep Parhar <np@FreeBSD.org> |
Assume INET, INET6, and TCP_OFFLOAD when the driver is built out of tree and
KERNBUILDDIR is not set.
MFC after: 2 weeks
|
| #
de720122 |
| 15-Jul-2012 |
Gleb Smirnoff <glebius@FreeBSD.org> |
Merge head r236710 through r238467.
|
| #
6cf87ec8 |
| 13-Jul-2012 |
Xin LI <delphij@FreeBSD.org> |
IFC @238412.
|
| #
b652778e |
| 11-Jul-2012 |
Peter Grehan <grehan@FreeBSD.org> |
IFC @ r238370
|
| #
09fe6320 |
| 19-Jun-2012 |
Navdeep Parhar <np@FreeBSD.org> |
- Updated TOE support in the kernel.
- Stateful TCP offload drivers for Terminator 3 and 4 (T3 and T4) ASICs.
These are available as t3_tom and t4_tom modules that augment cxgb(4)
and cxgbe(4) r
- Updated TOE support in the kernel.
- Stateful TCP offload drivers for Terminator 3 and 4 (T3 and T4) ASICs.
These are available as t3_tom and t4_tom modules that augment cxgb(4)
and cxgbe(4) respectively. The cxgb/cxgbe drivers continue to work as
usual with or without these extra features.
- iWARP driver for Terminator 3 ASIC (kernel verbs). T4 iWARP in the
works and will follow soon.
Build-tested with make universe.
30s overview
============
What interfaces support TCP offload? Look for TOE4 and/or TOE6 in the
capabilities of an interface:
# ifconfig -m | grep TOE
Enable/disable TCP offload on an interface (just like any other ifnet
capability):
# ifconfig cxgbe0 toe
# ifconfig cxgbe0 -toe
Which connections are offloaded? Look for toe4 and/or toe6 in the
output of netstat and sockstat:
# netstat -np tcp | grep toe
# sockstat -46c | grep toe
Reviewed by: bz, gnn
Sponsored by: Chelsio communications.
MFC after: ~3 months (after 9.1, and after ensuring MFC is feasible)
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