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

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

spdx: The BSD-2-Clause-NetBSD identifier is obsolete, drop -NetBSD

The SPDX folks have obsoleted the BSD-2-Clause-NetBSD identifier. Catch
up to that fact and revert to their recommended match of BS

spdx: The BSD-2-Clause-NetBSD identifier is obsolete, drop -NetBSD

The SPDX folks have obsoleted the BSD-2-Clause-NetBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

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gem(4): Remove onboard-only Sun ERI and remnants of SBus support

These bits are obsolete since 58aa35d42975c298ca0adba705c042596303c9f5.
This change reverts part of 9ba2b298dfda78b6669281507b314a4c4

gem(4): Remove onboard-only Sun ERI and remnants of SBus support

These bits are obsolete since 58aa35d42975c298ca0adba705c042596303c9f5.
This change reverts part of 9ba2b298dfda78b6669281507b314a4c441cd706 as
well as effectively bd3d9826d73b780d349c53ee373060bc7b8d0581, i. e. the
SBus-related modifications. This also gets rid of a nasty hack required
as bus_{read,write}_N(9) doesn't really fit bus_space_subregion(9).

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Mechanically convert gem(4) to IfAPI

Sponsored by: Juniper Networks, Inc.
Differential Revision: https://reviews.freebsd.org/D37809

gem: Remove unused devclass argument to DRIVER_MODULE.

Remove unused miibus_devclass and miibus_fdt_devclass.

Convert to if_foreach_llmaddr() KPI.

ifnet: Replace if_addr_lock rwlock with epoch + mutex

Run on LLNW canaries and tested by pho@

gallatin:
Using a 14-core, 28-HTT single socket E5-2697 v3 with a 40GbE MLX5
based ConnectX 4-LX NIC, I

ifnet: Replace if_addr_lock rwlock with epoch + mutex

Run on LLNW canaries and tested by pho@

gallatin:
Using a 14-core, 28-HTT single socket E5-2697 v3 with a 40GbE MLX5
based ConnectX 4-LX NIC, I see an almost 12% improvement in received
packet rate, and a larger improvement in bytes delivered all the way
to userspace.

When the host receiving 64 streams of netperf -H $DUT -t UDP_STREAM -- -m 1,
I see, using nstat -I mce0 1 before the patch:

InMpps OMpps InGbs OGbs err TCP Est %CPU syscalls csw irq GBfree
4.98 0.00 4.42 0.00 4235592 33 83.80 4720653 2149771 1235 247.32
4.73 0.00 4.20 0.00 4025260 33 82.99 4724900 2139833 1204 247.32
4.72 0.00 4.20 0.00 4035252 33 82.14 4719162 2132023 1264 247.32
4.71 0.00 4.21 0.00 4073206 33 83.68 4744973 2123317 1347 247.32
4.72 0.00 4.21 0.00 4061118 33 80.82 4713615 2188091 1490 247.32
4.72 0.00 4.21 0.00 4051675 33 85.29 4727399 2109011 1205 247.32
4.73 0.00 4.21 0.00 4039056 33 84.65 4724735 2102603 1053 247.32

After the patch

InMpps OMpps InGbs OGbs err TCP Est %CPU syscalls csw irq GBfree
5.43 0.00 4.20 0.00 3313143 33 84.96 5434214 1900162 2656 245.51
5.43 0.00 4.20 0.00 3308527 33 85.24 5439695 1809382 2521 245.51
5.42 0.00 4.19 0.00 3316778 33 87.54 5416028 1805835 2256 245.51
5.42 0.00 4.19 0.00 3317673 33 90.44 5426044 1763056 2332 245.51
5.42 0.00 4.19 0.00 3314839 33 88.11 5435732 1792218 2499 245.52
5.44 0.00 4.19 0.00 3293228 33 91.84 5426301 1668597 2121 245.52

Similarly, netperf reports 230Mb/s before the patch, and 270Mb/s after the patch

Reviewed by: gallatin
Sponsored by: Limelight Networks
Differential Revision: https://reviews.freebsd.org/D15366

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

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error

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

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

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.

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Mechanically convert to if_inc_counter().

Use define from if_var.h to access a field inside struct if_data,
that resides in struct ifnet.

Sponsored by: Nginx, Inc.

The r48589 promised to remove implicit inclusion of if_var.h soon. Prepare
to this event, adding if_var.h to files that do need it. Also, include
all includes that now are included due to implicit po

The r48589 promised to remove implicit inclusion of if_var.h soon. Prepare
to this event, adding if_var.h to files that do need it. Also, include
all includes that now are included due to implicit pollution via if_var.h

Sponsored by: Netflix
Sponsored by: Nginx, Inc.

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Mechanically substitute flags from historic mbuf allocator with
malloc(9) flags in sys/dev.

Revert r224157, re-enabling r222135. The underlying problem keeping the
latter from working as expected was fixed in r225014.

MFC after: 3 days
Approved by: re (kib)

Revert r222135 by allowing controller reinitialization. Due to
unknown reason Apple UniNorth2 gem(4) device required manual
interface down/up operation after r222135. Even though this is not
correc

Revert r222135 by allowing controller reinitialization. Due to
unknown reason Apple UniNorth2 gem(4) device required manual
interface down/up operation after r222135. Even though this is not
correct thing and I don't like to revert it but it would be better
than breaking gem(4) on PPC. This should be revisited.

PR: kern/157405

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Correct r223648; as gem_init_locked() was calling gem_setladrf(), which
sets GEM_MAC_RX_CONFIG based on sc_mac_rxcfg which in turn is initialized
to zero, before reading the supposedly default config

Correct r223648; as gem_init_locked() was calling gem_setladrf(), which
sets GEM_MAC_RX_CONFIG based on sc_mac_rxcfg which in turn is initialized
to zero, before reading the supposedly default configuration we were
effectively not basing sc_mac_rxcfg and thus GEM_MAC_RX_CONFIG on the
default configuration. Solve this by calling gem_setladrf() after reading
in the default configuration of GEM_MAC_RX_CONFIG. This also avoids the
need to distinguish whether gem_setladrf() should enable the RX MAC again
and should be slightly more correct as we're now doing all of the RX MAC
configuration in the intended step.

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According to the OpenSolaris source the PCI latency and the cache line size
should be set for Sun ERI.
Tested by: yongari

Fix typo in r223648 which was accidentally committed

- In gem_reset_rx() also reset the RX MAC which is necessary in order to
get it out of a stuck condition that can be caused by GEM_MAC_RX_OVERFLOW.
- In gem_reset_rxdma() call gem_setladrf() in ord

- In gem_reset_rx() also reset the RX MAC which is necessary in order to
get it out of a stuck condition that can be caused by GEM_MAC_RX_OVERFLOW.
- In gem_reset_rxdma() call gem_setladrf() in order to reprogram the RX
filter and restore the previous content of GEM_MAC_RX_CONFIG. While at it
consistently use the newly introduced sc_mac_rxcfg throughout the driver
instead of reading the its old content.
- Increment if_iqdrops instead of if_ierrors in case of RX buffer allocation
failure.
- According to the GEM datasheet the RX MAC should also be disabled in
gem_setladrf() before changing its configuration.
- Add error messages to gem_disable_{r,t}x() and take advantage of these
throughout the driver instead of duplicating their functionality all over
the place.

In joint forces with: yongari

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Remove unnecessary controller reinitialization by checking
IFF_DRV_RUNNING flag. Previously running dhclient or adding alias
addresses reinitialized controller and it resulted in unnecessary
link fl

Remove unnecessary controller reinitialization by checking
IFF_DRV_RUNNING flag. Previously running dhclient or adding alias
addresses reinitialized controller and it resulted in unnecessary
link flips.

Reviewed by: marius

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Correct spelling in comments.

Submitted by: brucec

- Fix and enable support for flow control.
- Partially revert r172334; as it turns out the DELAYs in gem_reset_{r,t}x()
are actually necessary although bus space barriers and gem_bitwait() are
us

- Fix and enable support for flow control.
- Partially revert r172334; as it turns out the DELAYs in gem_reset_{r,t}x()
are actually necessary although bus space barriers and gem_bitwait() are
used, otherwise the controller may trigger an IOMMU errors on at least
sparc64. This is in line with what Linux and OpenSolaris do.

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Convert the PHY drivers to honor the mii_flags passed down and convert
the NIC drivers as well as the PHY drivers to take advantage of the
mii_attach() introduced in r213878 to get rid of certain hac

Convert the PHY drivers to honor the mii_flags passed down and convert
the NIC drivers as well as the PHY drivers to take advantage of the
mii_attach() introduced in r213878 to get rid of certain hacks. For
the most part these were:
- Artificially limiting miibus_{read,write}reg methods to certain PHY
addresses; we now let mii_attach() only probe the PHY at the desired
address(es) instead.
- PHY drivers setting MIIF_* flags based on the NIC driver they hang
off from, partly even based on grabbing and using the softc of the
parent; we now pass these flags down from the NIC to the PHY drivers
via mii_attach(). This got us rid of all such hacks except those of
brgphy() in combination with bce(4) and bge(4), which is way beyond
what can be expressed with simple flags.

While at it, I took the opportunity to change the NIC drivers to pass
up the error returned by mii_attach() (previously by mii_phy_probe())
and unify the error message used in this case where and as appropriate
as mii_attach() actually can fail for a number of reasons, not just
because of no PHY(s) being present at the expected address(es).

Reviewed by: jhb, yongari

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Merge r207585 from cas(4):
- Don't probe for PHYs if we already know to use a SERDES. Unlike as with
cas(4) this only serves to speed up the the device attach though and can
only be determined vi

Merge r207585 from cas(4):
- Don't probe for PHYs if we already know to use a SERDES. Unlike as with
cas(4) this only serves to speed up the the device attach though and can
only be determined via the OFW device tree but not from the VPD.
- Don't touch the MIF when using a SERDES.
- Add some missing bus space barriers, mainly in the PCS code path.

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MFC: r204222

According to the Linux sungem driver, in case of Apple (K2) GMACs
GEM_MIF_CONFIG_MDI0 cannot be trusted when the firmware has powered
down the chip so the internal transceiver has to be

MFC: r204222

According to the Linux sungem driver, in case of Apple (K2) GMACs
GEM_MIF_CONFIG_MDI0 cannot be trusted when the firmware has powered
down the chip so the internal transceiver has to be hardcoded. This
is also in line with the AppleGMACEthernet driver, which just doesn't
distinguish between internal/external transceiver and MDIO/MDI1
respectively in the first place. Tested by: Andreas Tobler

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