Copy stable/11@r303970 to releng/11.0 as part of the 11.0-RELEASE
cycle.

Prune svn:mergeinfo from the new branch, and rename it to RC1.

Update __FreeBSD_version.

Use the quarterly branch for the default FreeBSD.conf pkg(8) repo and
the dvd1.iso packages population.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Use macro MIN() from sys/param.h.

MFC after: 2 weeks.

Cleanup unnecessary semicolons from utilities we all love.

Improve detection of extended QSFP diagnostics.

The standards in the QSFP diagnostics area are not clear when the
additional measurements are present or not. Use a valid temperature
reading as an indicator for the presence of voltage and TX/RX power
measurements.

MFC after: 1 week
Sponsored by: Mellanox Technologies
Tested by: Netflix
Differential Revision: https://reviews.freebsd.org/D5391
Reviewed by: gallatin

Add SFF-8024 Extended Specification Compliance

Submitted by: markb_mellanox.com
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D4666

* Update SFF-8024 Identifier constants.
* Fix SFF_8436_CC_EXT in SFF-8436 memory map.
* Add SFF-8436/8636 bits (revision compliance/nominal bitrate).
* Do some small style/type fixes.

Simplify i2c reader: we don't need per-NIC handler anymore.
Make code use read_i2c() function instead of callback.
Simplify&document struct i2c_info.
Consistently use uint8_t to read from i2c.

Show SFP+/QSFP memory map dump on higher verbose levels.

Sponsored by: Yandex LLC
MFC after: 1 week

Do not try to read i2c info when no transceiver is present.

MFC with: r270064
Sponsored by: Yandex LLC

* Unconditionally turn on SIOCGI2C probing for all interfaces
on "ifconfig -v". I've seen no measurable timing difference
for doing additional SIOCGI2C call for system with 4k vlans.
* Determine appropriate handler (SFP/QSFP) by reading identification
byte (which is the same for both SFF-8472 and SFF-8436) instead
of checking driver name.

MFC with: r270064
Sponsored by: Yandex LLC

* Add SIOCGI2C driver ioctl used to retrieve i2c info.
* Convert ixgbe to use this ioctl
* Convert ifconfig to use generic i2c handler for "ix" interfaces.

Approved by: Eric Joyner (ixgbe part)
MFC after: 2 weeks
Sponsored by: Yandex LLC

* Add new net/sff8436.h containing constants used to access
QSFP+ data via i2c inteface. These constants has been taken
from SFF-8436 "QSFP+ 10 Gbs 4X PLUGGABLE TRANSCEIVER" standard
rev 4.8.
* Add support for printing QSFP+ information from 40G NICs
such as Chelsio T5.

This commit does not contain ioctl changes necessary for this
functionality work, there will be another commit soon.

Example:
cxl1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=ec07bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,.....>
ether 00:07:43:28:ad:08
nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
media: Ethernet 40Gbase-LR4 <full-duplex>
status: active
plugged: QSFP+ 40GBASE-LR4 (MPO Parallel Optic)
vendor: OEM PN: OP-QSFP-40G-LR4 SN: 20140318001 DATE: 2014-03-18
module temperature: 64.06 C voltage: 3.26 Volts
lane 1: RX: 0.47 mW (-3.21 dBm) TX: 2.78 mW (4.46 dBm)
lane 2: RX: 0.20 mW (-6.94 dBm) TX: 2.80 mW (4.47 dBm)
lane 3: RX: 0.18 mW (-7.38 dBm) TX: 2.79 mW (4.47 dBm)
lane 4: RX: 0.90 mW (-0.45 dBm) TX: 2.80 mW (4.48 dBm)

Tested on: Chelsio T5
Tested on: Mellanox/Huawei passive/active cables/transceivers.
MFC after: 2 weeks
Sponsored by: Yandex LLC

Zero buffer before request.

Clean up unused definitions.

* Use standard net/sff8472.h header for sff bits and offsets.
* Convert sff_8472_id to 'const char *' to please clang.

Pointed by: np

Add support for reading i2c SFP/SFP+ data from NIC driver and
presenting most interesting fields via ifconfig -v.
This version supports Intel ixgbe driver only.

Tested on: Cisco,Intel,Mellanox,ModuleTech,Molex transceivers
MFC after: 2 weeks