MFC 322488
hyperv: Update copyright for the files changed in 2017

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D11982

MFC 322299

hyperv/hn: Implement transparent mode network VF.

How network VF works with hn(4) on Hyper-V in transparent mode:

- Each network VF has a cooresponding hn(4).
- The network VF and the it's cooresponding hn(4) have the same hardware
address.
- Once the network VF is attached, the cooresponding hn(4) waits several
seconds to make sure that the network VF attach routing completes, then:
o Set the intersection of the network VF's if_capabilities and the
cooresponding hn(4)'s if_capabilities to the cooresponding hn(4)'s
if_capabilities. And adjust the cooresponding hn(4) if_capable and
if_hwassist accordingly. (*)
o Make sure that the cooresponding hn(4)'s TSO parameters meet the
constraints posed by both the network VF and the cooresponding hn(4).
(*)
o The network VF's if_input is overridden. The overriding if_input
changes the input packet's rcvif to the cooreponding hn(4). The
network layers are tricked into thinking that all packets are
neceived by the cooresponding hn(4).
o If the cooresponding hn(4) was brought up, bring up the network VF.
The transmission dispatched to the cooresponding hn(4) are
redispatched to the network VF.
o Bringing down the cooresponding hn(4) also brings down the network
VF.
o All IOCTLs issued to the cooresponding hn(4) are pass-through'ed to
the network VF; the cooresponding hn(4) changes its internal state
if necessary.
o The media status of the cooresponding hn(4) solely relies on the
network VF.
o If there are multicast filters on the cooresponding hn(4), allmulti
will be enabled on the network VF. (**)
- Once the network VF is detached. Undo all damages did to the
cooresponding hn(4) in the above item.

NOTE:
No operation should be issued directly to the network VF, if the
network VF transparent mode is enabled. The network VF transparent mode
can be enabled by setting tunable hw.hn.vf_transparent to 1. The network
VF transparent mode is _not_ enabled by default, as of this commit.

The benefit of the network VF transparent mode is that the network VF
attachment and detachment are transparent to all network layers; e.g. live
migration detaches and reattaches the network VF.

The major drawbacks of the network VF transparent mode:
- The netmap(4) support is lost, even if the VF supports it.
- ALTQ does not work, since if_start method cannot be properly supported.

(*)
These decisions were made so that things will not be messed up too much
during the transition period.

(**)
This does _not_ need to go through the fancy multicast filter management
stuffs like what vlan(4) has, at least currently:
- As of this write, multicast does not work in Azure.
- As of this write, multicast packets go through the cooresponding hn(4).

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D11803

MFC 312688

Approved by: sephe (mentor)

r312688
hyperv/hn: add the support for VF drivers (SR-IOV)

Hyper-V's NIC SR-IOV implementation needs a Hyper-V synthetic NIC and
a VF NIC to work together (both NICs have the same MAC address), mainly to
support seamless live migration.

When the VF device becomes UP (or DOWN), the synthetic NIC driver needs
to switch the data path from the synthetic NIC to the VF (or the opposite).

Note: multicast/broadcast packets are still received through the synthetic
NIC and we need to inject the packets through the VF interface (if the VF is
UP), even if the synthetic NIC is DOWN (so we need to force the rxfilter
to be NDIS_PACKET_TYPE_PROMISCUOUS, when the VF is UP).

Reviewed by: sephe
Approved by: sephe (mentor)
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D8964

MFC 307710-307712,307714

307710
hyperv/hn: Always query RSS capabilities.

- This avoid distributing NDIS version check.
- Only NDIS 6.20 required (earlier NDIS uses different indirect table
format).

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D8291

307711
hyperv/hn: Check NVS version for HASHVAL pktinfo on sending path.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D8293

307712
hyperv/hn: Add network change support.

Currently the network change is simulated by link status changes.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D8295

307714
hyperv/hn: Function renaming; consistent w/ hardware capabilities query.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D8296

MFC 305578-305581

305578
hyperv/hn: Pull vmbus channel open up.

While I'm here, pull up the channel callback related code too.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7805

305579
hyperv/hn: Push RXBUF size adjustment down.

It is not used in other places.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7806

305580
hyperv/hn: Factor out function to do NVS initialization.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7807

305581
hyperv/hn: Pass MTU around.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7808

MFC 305454,305455,305521,305524-305526

305454
hyperv/hn: Fix VLAN tag setup for outgoing VLAN packets.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7785

305455
hyperv/hn: Avoid bit fields for LSOv2 setup.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7786

305521
hyperv/hn: Avoid bit fields for TXCSUM setup.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7792

305524
hyperv/hn: Cleanup RNDIS packet message encapsulation.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7793

305525
hyperv/hn: Simplify per-packet-info construction.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7794

305526
hyperv/hn: Nuke unused bits

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7795

MFC 305175,305176,305179,305182,305268,305270,305276

305175
net/rndis: Define per-packet-info for RNDIS packet message

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7708

305176
hyperv/hn: Stringent per-packet-info verification.

While I'm here, minor style changes.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7709

305179
hyperv/hn: Fix VLAN tag construction.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7716

305182
net/rndis: Define types for RNDIS pktinfo rm_type field.

They are defined by NDIS spec, so the NDIS prefix.

Reviewed by: hps
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7717

305268
hyperv/hn: Rework RXCSUM related bits

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7735

305270
hyperv/hn: Simplify RX hash related bits.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7736

305276
hyperv/hn: Use the per-packet-info types defined by net/rndis.h

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7737

MFC 304204-304206,304252-304256

304204
hyperv/hn: Factor out hn_nvs_send/hn_nvs_send_sglist

Avoid unnecessary message type setting and centralize the send context
to transaction id cast.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7500

304205
hyperv/hn: Simplify RNDIS NVS message sending.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7501

304206
hyperv/hn: Simplify RNDIS message checks on RX path.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7502

304252
hyperv/hn: Ignore the useless TX table.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7514

304253
hyperv/hn: Simplify RNDIS RX packets acknowledgement.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7515

304254
hyperv/hn: Remove reference to nvsp_msg

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7516

304255
hyperv/hn: Remove reference to nvsp_status

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7517

304256
hyperv/hn: Get rid of unused bits

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7518

MFC 303945,303947-303949,303989,303992,303998,304001,304002,304109,304111

303945
hyperv/vmbus: Add macro to get channel packet data length.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7455

303947
hyperv/vmbus: Add APIs for various types of transactions.

Reviewed by: Jun Su <junsu microsoft com>
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7456

303948
hyperv/hn: Switch to vmbus xact APIs for NVS initialization

Reviewed by: Jun Su <junsu microsoft com>
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7457

303949
hyperv/vmbus: Use xact APIs to implement post message Hypercall APIs

Avoid code duplication.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7458

303989
hyperv/hn: Simplify NDIS configuration.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7466

303992
hyperv/hn: Simplify NDIS initialization.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7467

303998
hyperv/hn: Switch to vmbus xact APIs for NVS RXBUF connection.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7469

304001
hyperv/hn: Switch to vmbus xact APIs for NVS chimney buffer connection.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7470

304002
hyperv/hn: Simplify RXBUF disconnection.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7472

304109
hyperv/hn: Simplify chimney sending buffer disconnection.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7479

304111
hyperv/hn: Switch to vmbus xact APIs for sub-channel alloc request.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D7480