Sync to HEAD@r269943.

Sync the E1000 shared code with Intel internal, this adds fixes,
and more importantly, new I218 adapter support to the em driver.

MFC after: 1 week

MFC @ r259205 in preparation for some SVM updates. (for real this time)

Merge head r233826 through r256722.

Merge head@256284

IFC @256277

Approved by: ken (mentor)

MFC - tracking commit

Update the Intel igb driver to version 2.4.0
- This version has support for the new Intel Avoton systems,
including 2.5Gb support, further it now has IPv6/TSO6 support as
well. Shared code has been

Update the Intel igb driver to version 2.4.0
- This version has support for the new Intel Avoton systems,
including 2.5Gb support, further it now has IPv6/TSO6 support as
well. Shared code has been updated where necessary as well. Thanks
to my new assistant Eric Joyner for doing the transmit path changes
to bring in the IPv6/TSO6 support. Thanks to Gleb for catching the
one bug and change needed in NETMAP.

Approved by: re

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Merge fresh head.

sync from head

IFC @247348.

Refresh on the shared code for the E1000 drivers.
- bear with me, there are lots of white space changes, I would not
do them, but I am a mere consumer of this stuff and if these drivers
are

Refresh on the shared code for the E1000 drivers.
- bear with me, there are lots of white space changes, I would not
do them, but I am a mere consumer of this stuff and if these drivers
are to stay in shape they need to be taken.

em driver changes: support for the new i217/i218 interfaces

igb driver changes:
- TX mq start has a quick turnaround to the stack
- Link/media handling improvement
- When link status changes happen the current flow control state
will now be displayed.
- A few white space/style changes.

lem driver changes:
- the shared code uncovered a bogus write to the RLPML register
(which does not exist in this hardware) in the vlan code,this
is removed.

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Sync from head

Merge head r236710 through r238467.

IFC @238412.

IFC @ r238370

Sync with Intel internal source:
shared code update and small changes in core required
Add support for new i210/i211 devices
Improve queue calculation based on mac type

MFC after:5 days

IFC @230489 (pending review).

IFC to head to catch up the bhyve branch

Approved by: grehan@

Consistently use types in e1000 driver code:

- Two struct members eee_disable are used in a function that expects
an int *, so declare them int, not bool.
- igb_tx_ctx_setup() returns a boolean

Consistently use types in e1000 driver code:

- Two struct members eee_disable are used in a function that expects
an int *, so declare them int, not bool.
- igb_tx_ctx_setup() returns a boolean value, so declare it bool, not int.
- igb_header_split is passed to TUNABLE_INT, so delcare it int, not bool.
- igb_tso_setup() returns a bool, so declare it bool, not boolean_t.
- Do not re-define bool/true/false if the symbols already exist.

MFC after: 2 weeks
Sponsored by: Isilon Systems, LLC

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Part 1 of two parts, this is the shared code changes in
support of new deltas for both em and igb drivers.

Note that I am not able to track all the bugs fixed in
this code, I am a consumer of it as

Part 1 of two parts, this is the shared code changes in
support of new deltas for both em and igb drivers.

Note that I am not able to track all the bugs fixed in
this code, I am a consumer of it as a component of my
core drivers. It is important to keep the FreeBSD drivers
up to date with it however.

One important note is there is a key fix for 82574 in this
update. Also, there are lots of white space changes, I am
not happy about them but have no control over it :)

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Merge svn+ssh://svn.freebsd.org/base/head@218816

Add support for the new I350 family of 1G interfaces.
- this also includes virtualization support on these devices

Correct some vlan issues we were seeing in test, jumbo frames on vlans
did not

Add support for the new I350 family of 1G interfaces.
- this also includes virtualization support on these devices

Correct some vlan issues we were seeing in test, jumbo frames on vlans
did not work correctly, this was all due to confused logic around HW
filters, the new code should now work for all uses.

Important fix: when mbuf resources are depeleted, it was possible to
completely empty the RX ring, and then the RX engine would stall
forever. This is fixed by a flag being set whenever the refresh code
fails due to an mbuf shortage, also the local timer now makes sure
that all queues get an interrupt when it runs, the interrupt code
will then always call rxeof, and in that routine the first thing done
is now to check the refresh flag and call refresh_mbufs. This has been
verified to fix this type 'hang'. Similar code will follow in the other
drivers.

Finally, sync up shared code for the I350 support.

Thanks to everyone that has been reporting issues, and helping in the
debug/test process!!

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svn+ssh://svn.freebsd.org/base/head@216199

Sync: merge r215709 through r215824 from ^/head.