sys: Remove $FreeBSD$: one-line .c comment pattern

Remove /^/[*/]\s*\$FreeBSD\$.*\n/

e1000: Catch up commit with DPDK

Various syncs with the e1000 shared code from DPDK:
"cid-gigabit.2020.06.05.tar.gz released by ND"

Approved by: imp
Obtained from: DPDK
MFC after: 1 week

e1000: expose xMDIO methods

Move read and write xmdio methods to e1000_phy.

Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Signed-off-by: Guinan Sun <guinanx.sun@intel.com>
Reviewed-by: Wei Zhao <wei.zhao1@intel.com>

Approved by: imp
Obtained from: DPDK (b14d20f1b2bb0e6d95f19963c5d7f55374e0ead9)
MFC after: 1 week

e1000: Update copyrights and readme

Copyrights in sync with "cid-gigabit.2020.06.05.tar.gz released by ND"
(from DPDK).

README from the latest em-7.7.8 on intel.com

Approved by: imp
MFC after: 1 week

e1000: Revert Update intel shared code

This reverts commit fc7682b17f3738573099b8b03f5628dcc8148adb.

This will be done incrementally to help with bisecting an issue in
later I21x devices (ich8lan).

PR: 258153
Approved by: imp
MFC after: 1 day

e1000: Update intel shared code

Sync the e1000 shared code with DPDK shared code
"cid-gigabit.2020.06.05.tar.gz released by ND"

Primary focus was on client platforms (ich8lan). More work remains here
but we need an Intel contact for client networking.

Reviewed by: grehan, Intel Networking (erj, earlier rev)
Obtained from: DPDK <http://git.dpdk.org/dpdk/tree/drivers/net/e1000/base>
MFC after: 1 week
Sponsored by: me
Differential Revision: https://reviews.freebsd.org/D31547

Sleep rather than spin in e1000 when doing long running config operations.

With r333218 it is now possible for drivers to use an sx lock and thus sleep while
waiting on long running operations rather than DELAY().

Reported by: gallatin
Reviewed by: sbruno
Approved by: sbruno
MFC after: 1 month
Sponsored by: Limelight Networks
Differential Revision: https://reviews.freebsd.org/D14984

sys/dev: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

Revert r323516 (iflib rollup)

This was really too big of a commit even if everything worked, but there
are multiple new issues introduced in the one huge commit, so it's not
worth keeping this until it's fixed.

I'll work on splitting this up into logical chunks and introduce them one
at a time over the next week or two.

Approved by: sbruno (mentor)
Sponsored by: Limelight Networks

Roll up iflib commits from github. This pulls in most of the work done
by Matt Macy as well as other changes which he has accepted via pull
request to his github repo at https://github.com/mattmacy/networking/

This should bring -CURRENT and the github repo into close enough sync to
allow small feature branches rather than a large chain of interdependant
patches being developed out of tree. The reset of the synchronization
should be able to be completed on github by splitting the remaining
changes that are not yet ready into short feature branches for later
review as smaller commits.

Here is a summary of changes included in this patch:

1) More checks when INVARIANTS are enabled for eariler problem
detection
2) Group Task Queue cleanups
- Fix use of duplicate shortdesc for gtaskqueue malloc type.
Some interfaces such as memguard(9) use the short description to
identify malloc types, so duplicates should be avoided.
3) Allow gtaskqueues to use ithreads in addition to taskqueues
- In some cases, this can improve performance
4) Better logging when taskqgroup_attach*() fails to set interrupt
affinity.
5) Do not start gtaskqueues until they're needed
6) Have mp_ring enqueue function enter the ABDICATED rather than BUSY
state. This moves the TX to the gtaskq and allows processing to
continue faster as well as make TX batching more likely.
7) Add an ift_txd_errata function to struct if_txrx. This allows
drivers to inspect/modify mbufs before transmission.
8) Add a new IFLIB_NEED_ZERO_CSUM for drivers to indicate they need
checksums zeroed for checksum offload to work. This avoids modifying
packet data in the TX path when possible.
9) Use ithreads for iflib I/O instead of taskqueues
10) Clean up ioctl and support async ioctl functions
11) Prefetch two cachlines from each mbuf instead of one up to 128B. We
often need to parse packet header info beyond 64B.
12) Fix potential memory corruption due to fence post error in
bit_nclear() usage.
13) Improved hang detection and handling
14) If the packet is smaller than MTU, disable the TSO flags.
This avoids extra packet parsing when not needed.
15) Move TCP header parsing inside the IS_TSO?() test.
This avoids extra packet parsing when not needed.
16) Pass chains of mbufs that are not consumed by lro to if_input()
rather call if_input() for each mbuf.
17) Re-arrange packet header loads to get as much work as possible done
before a cache stall.
18) Lock the context when calling IFDI_ATTACH_PRE()/IFDI_ATTACH_POST()/
IFDI_DETACH();
19) Attempt to distribute RX/TX tasks across cores more sensibly,
especially when RX and TX share an interrupt. RX will attempt to
take the first threads on a core, and TX will attempt to take
successive threads.
20) Allow iflib_softirq_alloc_generic() to request affinity to the same
cpus an interrupt has affinity with. This allows TX queues to
ensure they are serviced by the socket the device is on.
21) Add new iflib sysctls to net.iflib:
- timer_int - interval at which to run per-queue timers in ticks
- force_busdma
22) Add new per-device iflib sysctls to dev.X.Y.iflib
- rx_budget allows tuning the batch size on the RX path
- watchdog_events Count of watchdog events seen since load
23) Fix error where netmap_rxq_init() could get called before
IFDI_INIT()
24) e1000: Fixed version of r323008: post-cold sleep instead of DELAY
when waiting for firmware
- After interrupts are enabled, convert all waits to sleeps
- Eliminates e1000 software/firmware synchronization busy waits after
startup
25) e1000: Remove special case for budget=1 in em_txrx.c
- Premature optimization which may actually be incorrect with
multi-segment packets
26) e1000: Split out TX interrupt rather than share an interrupt for
RX and TX.
- Allows better performance by keeping RX and TX paths separate
27) e1000: Separate igb from em code where suitable
Much easier to understand separate functions and "if (is_igb)" than
previous tests like "if (reg_icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))"

#blamebruno

Reviewed by: sbruno
Approved by: sbruno (mentor)
Sponsored by: Limelight Networks
Differential Revision: https://reviews.freebsd.org/D12235

Revert r323008 and its conversion of e1000/iflib to using SX locks.

This seems to be missing something on the 82574L causing NFS root mounts
to hang.

Reported by: kib

Continuation of lock cleanup in e1000.

Post-cold sleep instead of DELAY when waiting for firmware.

Convert softc mutex to an SX lock. Change all waits to sleeps
once interrupts are enabled (and it is safe to sleep).

Submitted by: Matt Macy <matt@mattmacy.io>
Sponsored by: Limelight Networks
Differential Revision: https://reviews.freebsd.org/D12101

Revert 287914,287762.

Reports of breakage on igb(4) have been narrowed down to 287762 and 287914
is an dependant change.

Submitted by: erj

Update em(4) with D3162 after testing further on hardware that failed
to attach with the last version of this commit. This commit fixes
attach failures on "ICH8" class devices via modifications to
e1000_init_nvm_params_ich8lan()

- Fix compiler warning in 80003es2lan.c
- Add return value handler for e1000_*_kmrn_reg_80003es2lan
- Fix usage of DEBUGOUT
- Remove unnecessary variable initializations.
- Removed unused variables (complaints from gcc).
- Edit defines in 82571.h.
- Add workaround for igb hw errata.
- Shared code changes for Skylake/I219 support.
- Remove unused OBFF and LTR functions.

Tested by some of the folks that reported breakage in previous incarnation.
Thanks to AllanJude, gjb, gnn, tijl for tempting fate with their machines.

Submitted by: erj@freebsd.org
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D3162

Revert last two commits to em(4)/igb(4). Reports are coming in that
this breaks initialization and reads from EEPROM on boot/driver load.

r287469 is being reverted as a dependancy on r287467

e1000: Shared code updates
- Fix compiler warning in 80003es2lan.c
- Add return value handler for e1000_*_kmrn_reg_80003es2lan
- Fix usage of DEBUGOUT
- Remove unnecessary variable initializations.
- Removed unused variables (complaints from gcc).
- Edit defines in 82571.h.
- Add workaround for igb hw errata.
- Shared code changes for Skylake/I219 support.
- Remove unused OBFF and LTR functions.

Differential Revision: https://reviews.freebsd.org/D3162
Submitted by: erj
MFC after: 1 month
Sponsored by: Intel Corporation

Bump all copywrite dates to 2015

Differential Revision: https://reviews.freebsd.org/D3160
Submitted by: erj
MFC after: 2 weeks
Sponsored by: Intel Corportation

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

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

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.

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