Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

MFC e1000 driver revisions: 248906,248908,249074,249339,249509
250108,250109,250168,250413,250414

MFC of the e1000 drivers: revisions include
227309,228281,228386,228387,228393,228405,
228415,228788,228803,229606,229767,229939,
230023,230024,230742,231796,232238,233708,
234154,234665,235256

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Merge of the source for igb and em into dev/e1000, this
proved to be necessary to make the static drivers work
in EITHER/OR or BOTH configurations. Modules will still
build in sys/modules/igb or em as before.

This also updates the igb driver for support for the 82576
adapter, adds shared code fixes, and etc....

MFC after: ASAP

A few small but significant fixes:
- Coverity Prevent(tm) CID 1906 a bogus use of bzero where unneeded.
- ICH8 systems autoneg to 100 rather than 1000, this can also be
seen in 82573, the logic was backwards.
- On new 82575 quadports half duplex tx speed is slow... this was due
to overwriting TCTL reg rather than adding bits.

Merge in the new driver (6.5.0) of Intel. This has a new
shared code infrastructure that is family specific and
modular. There is also support for our latest gigabit
nic, the 82575 that is MSI/X and multiqueue capable.

The new shared code changes some interfaces to the core
code but testing at Intel has been going on for months,
it is fairly stable.

I have attempted to be careful in retaining any fixes that
CURRENT had and we did not, I apologize in advance if any
thing gets clobbered, I'm sure I'll hear about it :)

Approved by pdeuskar

Merge in new driver from Intel, version 6.0.5. It adds support for
80003 NICs and NICs found on ICH8 mobos, and improves support for
already known chips.

Details:
- if_em.c. Merged manually, viewing diff between new vendor
driver and previous one. This was an easy task, because
most changes between 5.1.5 and 6.0.5 are bugfixes taken
from FreeBSD.
- if_em_hw.h. Dropped in from vendor, and then restored
revisions 1.16, 1.17, 1.18.
- if_em_hw.c. Dropped in from vendor, and then restored
revision 1.15.
- if_em_osdep.h. Added new required macros from vendor file
and add a hack against define namespace mangling in
if_em_hw.h. Intel made another hack, but I prefer mine.

Merge in new driver from Intel, version 5.1.5. Adds support for some
new chips and improves support for already supported ones.

Some details, important for future merges:
- if_em.c merged manually, viewing diff between new vendor
driver and previous one.
- if_em_hw.h dropped in from vendor, and then restored revisions
1.16, 1.17, 1.18.
- if_em_hw.c dropped in from vendor, and then two liner change made,
that restores support for two rare chips.

- Polling can be used on SMP.
- A kernel module can support polling.

Correct a minor typo.

Pointed out by: Xuefeng DENG <dengxf at dengh com>
Approved by: re (scottl)

Latest README to correspond to latest Intel version 2.1.7

Add support for new devices.
Bug Fixes:
- Allow users to use LAA
- Remember promiscuous mode settings while bridging
- Allow gratuitous arp's to be sent

PR: 52966/54488
MFC after: 1 week

Add support for Quad port adapter
Add sysctl's to display statistics/debug_info
Set WAIT_FOR_AUTONEG_DEFAULT to zero by default
Increment packet in/out statistics inline instead of every two seconds.

MFC after: 3 days

Added support for 82541 and 82547 based adapters.
- These have Intel gigabit PHY
- 82547 uses CSA interface

MFC after: 1 week

- Move to array based indexing for TX/RX descriptor/buffer management
- Added support for ITR (interrupt throttle register). This feature is available on
adapters based on 82545 and above
- Fixed problem with vlan support when traffic has priority bits set. (kern/45907)

PR: kern/45907
MFC after: 1 week

- Set RS (Report Status) bit on all descriptors of a packet instead of just the last one.
- Set RDTR to zero by default instead of 28.
- Fixed a problem with TX hangs with jumbo frames when number of fragments in the mbuf chain
is large.
- Added support for 82540EP based cards.

MFC after: 3 days

TX/RX descriptor/buffer management changes.
Use array based scheme instead of queueing macros.

Submitted by: Luigi Rizzo (rizzo@icir.org)
MFC after: 3 days

- Use IO mode to reset the controller (82544 and beyond)
- Read the Mac address only once during attach.
(This fixes the failover issue observed using the bonding driver)

MFC after: 3 days

Added support for 82545EM and 82546EB based adapters.
Added Vlan support.

MFC after: 1 week