This is an implementation of the ipsec hardware offload feature for
the ixgbe driver and Intel's 10Gbe series NICs: x540, x550, 82599.
These patches apply to net-next v4.14 as well as Jeff Kirsher's next-queue
v4.15-rc1-206-ge47375b.
The ixgbe NICs support ipsec offload for 1024 Rx and 1024 Tx Security
Associations (SAs), using up to 128 inbound IP addresses, and using the
rfc4106(gcm(aes)) encryption. This code does not yet support IPv6,
checksum offload, or TSO in conjunction with the ipsec offload - those
will be added in the future.
This code shows improvements in both packet throughput and CPU utilization.
For example, here are some quicky numbers that show the magnitude of the
performance gain on a single run of "iperf -c <dest>" with the ipsec
offload on both ends of a point-to-point connection:
9.4 Gbps - normal case
7.6 Gbps - ipsec with offload
343 Mbps - ipsec no offload
To set up a similar test case, you first need to be sure you have a recent
version of iproute2 that supports the ipsec offload tag, probably something
from ip 4.12 or newer would be best. I have a shell script that builds
up the appropriate commands for me, but here are the resulting commands
for all tcp traffic between 14.0.0.52 and 14.0.0.70:
For the left side (14.0.0.52):
ip x p add dir out src 14.0.0.52/24 dst 14.0.0.70/24 proto tcp tmpl \
proto esp src 14.0.0.52 dst 14.0.0.70 spi 0x07 mode transport reqid 0x07
ip x p add dir in src 14.0.0.70/24 dst 14.0.0.52/24 proto tcp tmpl \
proto esp dst 14.0.0.52 src 14.0.0.70 spi 0x07 mode transport reqid 0x07
ip x s add proto esp src 14.0.0.52 dst 14.0.0.70 spi 0x07 mode transport \
reqid 0x07 replay-window 32 \
aead 'rfc4106(gcm(aes))' 0x44434241343332312423222114131211f4f3f2f1 128 \
sel src 14.0.0.52/24 dst 14.0.0.70/24 proto tcp offload dev eth4 dir out
ip x s add proto esp dst 14.0.0.52 src 14.0.0.70 spi 0x07 mode transport \
reqid 0x07 replay-window 32 \
aead 'rfc4106(gcm(aes))' 0x44434241343332312423222114131211f4f3f2f1 128 \
sel src 14.0.0.70/24 dst 14.0.0.52/24 proto tcp offload dev eth4 dir in
For the right side (14.0.0.70):
ip x p add dir out src 14.0.0.70/24 dst 14.0.0.52/24 proto tcp tmpl \
proto esp src 14.0.0.70 dst 14.0.0.52 spi 0x07 mode transport reqid 0x07
ip x p add dir in src 14.0.0.52/24 dst 14.0.0.70/24 proto tcp tmpl \
proto esp dst 14.0.0.70 src 14.0.0.52 spi 0x07 mode transport reqid 0x07
ip x s add proto esp src 14.0.0.70 dst 14.0.0.52 spi 0x07 mode transport \
reqid 0x07 replay-window 32 \
aead 'rfc4106(gcm(aes))' 0x44434241343332312423222114131211f4f3f2f1 128 \
sel src 14.0.0.70/24 dst 14.0.0.52/24 proto tcp offload dev eth4 dir out
ip x s add proto esp dst 14.0.0.70 src 14.0.0.52 spi 0x07 mode transport \
reqid 0x07 replay-window 32 \
aead 'rfc4106(gcm(aes))' 0x44434241343332312423222114131211f4f3f2f1 128 \
sel src 14.0.0.52/24 dst 14.0.0.70/24 proto tcp offload dev eth4 dir in
In both cases, the command "ip x s flush ; ip x p flush" will clean
it all out and remove the offloads.
Lastly, thanks to Alex Duyck for his early comments.
Please see the individual patches for version update info.
Shannon Nelson (10):
ixgbe: clean up ipsec defines
ixgbe: add ipsec register access routines
ixgbe: add ipsec engine start and stop routines
ixgbe: add ipsec data structures
ixgbe: add ipsec offload add and remove SA
ixgbe: restore offloaded SAs after a reset
ixgbe: process the Rx ipsec offload
ixgbe: process the Tx ipsec offload
ixgbe: ipsec offload stats
ixgbe: register ipsec offload with the xfrm subsystem
drivers/net/ethernet/intel/ixgbe/Makefile | 1 +
drivers/net/ethernet/intel/ixgbe/ixgbe.h | 33 +-
drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c | 2 +
drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c | 923 +++++++++++++++++++++++
drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.h | 92 +++
drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c | 4 +-
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 39 +-
drivers/net/ethernet/intel/ixgbe/ixgbe_type.h | 22 +-
8 files changed, 1093 insertions(+), 23 deletions(-)
create mode 100644 drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
create mode 100644 drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.h
--
2.7.4
