This patch builds the peer to peer communication path.
Communication is established by a negotiation process whereby messages are
sent back and forth between the peers until a connection is established.
This includes the Thunderbolt Network driver communication with the second
peer via Intel Connection Manager(ICM) firmware.
  +--------------------+            +--------------------+
  |Host 1              |            |Host 2              |
  |                    |            |                    |
  |     +-----------+  |            |     +-----------+  |
  |     |Thunderbolt|  |            |     |Thunderbolt|  |
  |     |Networking |  |            |     |Networking |  |
  |     |Driver     |  |            |     |Driver     |  |
  |     +-----------+  |            |     +-----------+  |
  |              ^     |            |              ^     |
  |              |     |            |              |     |
  | +------------+---+ |            | +------------+---+ |
  | |Thunderbolt |   | |            | |Thunderbolt |   | |
  | |Controller  v   | |            | |Controller  v   | |
  | |         +---+  | |            | |         +---+  | |
  | |         |ICM|<-+-+------------+-+-------->|ICM|  | |
  | |         +---+  | |            | |         +---+  | |
  | +----------------+ |            | +----------------+ |
  +--------------------+            +--------------------+
Note that this patch only establishes the link between the two hosts and
not Network Packet handling - this is dealt with in the next patch.

Signed-off-by: Amir Levy <redacted>
---
 drivers/thunderbolt/icm/Makefile  |   2 +-
 drivers/thunderbolt/icm/icm_nhi.c | 303 ++++++++++++++-
 drivers/thunderbolt/icm/net.c     | 793 ++++++++++++++++++++++++++++++++++++++
 drivers/thunderbolt/icm/net.h     |  70 ++++
 4 files changed, 1157 insertions(+), 11 deletions(-)
 create mode 100644 drivers/thunderbolt/icm/net.c

diff --git a/drivers/thunderbolt/icm/Makefile b/drivers/thunderbolt/icm/Makefile
index f0d0fbb..94a2797 100644
--- a/drivers/thunderbolt/icm/Makefile
+++ b/drivers/thunderbolt/icm/Makefile

@@ -1,2 +1,2 @@
 obj-${CONFIG_THUNDERBOLT_ICM} += thunderbolt-icm.o
-thunderbolt-icm-objs := icm_nhi.o
+thunderbolt-icm-objs := icm_nhi.o net.o

diff --git a/drivers/thunderbolt/icm/icm_nhi.c b/drivers/thunderbolt/icm/icm_nhi.c
index 984aa7c..578eb14 100644
--- a/drivers/thunderbolt/icm/icm_nhi.c
+++ b/drivers/thunderbolt/icm/icm_nhi.c

@@ -74,6 +74,12 @@ static const struct nla_policy nhi_genl_policy[NHI_ATTR_MAX + 1] = {
 					.len = TBT_ICM_RING_MAX_FRAME_SIZE },
 	[NHI_ATTR_MSG_FROM_ICM]		= { .type = NLA_BINARY,
 					.len = TBT_ICM_RING_MAX_FRAME_SIZE },
+	[NHI_ATTR_LOCAL_ROUTE_STRING]	= {.len = sizeof(struct route_string)},
+	[NHI_ATTR_LOCAL_UUID]		= { .len = sizeof(uuid_be) },
+	[NHI_ATTR_REMOTE_UUID]		= { .len = sizeof(uuid_be) },