Rename functions and variables from ixlv to iavf to match the
user-facing name change. There shouldn't be any functional changes
with this change, but this may help with browsing the source code
and reducing diffs in the future.

Submitted by:   kbowling@
Reviewed by:    erj@, sbruno@
Approved by:	re (gjb@)
Differential Revision:  https://reviews.freebsd.org/D17544

Finishes the conversion of the 40Gb Intel Ethernet drivers to iflib(9) for
FreeBSD 12.0, and fixes numerous bugs in both ixl(4) and iavf(4).

This commit also re-adds the VF driver to GENERIC since it now compiles and
functions.

The VF driver name was changed from ixlv(4) to iavf(4) because the VF driver is
now intended to be used with future products, not just with Fortville/Fort Park
VFs.

A man page update that documents these drivers is forthcoming in a separate
commit.

Reviewed by:    sbruno@, kbowling@
Tested by:      jeffrey.e.pieper@intel.com
Approved by:	re (gjb@)
Relnotes:       yes
Sponsored by:   Intel Corporation
Differential Revision: https://reviews.freebsd.org/D16429

Submitted by:	mmacy
Sponsored by:	Limelight Networks

And update copyrights to current year.

MFC after:	1 month
Sponsored by:	Intel Corporation

Update the driver to use iflib in order to bring performance,
maintainability, and (hopefully) stability benefits to the driver.

The driver currently isn't completely ported; features that are missing:

- VF driver (ixlv)
- SR-IOV host support
- RDMA support

The plan is to have these re-added to the driver before the next FreeBSD release.

Reviewed by:	gallatin@
Contributions by: gallatin@, mmacy@, krzysztof.galazka@intel.com
Tested by:	jeffrey.e.pieper@intel.com
MFC after:	1 month
Sponsored by:	Intel Corporation
Differential Revision:	https://reviews.freebsd.org/D15577

Refresh upstream driver before impending conversion to iflib.

Major changes:

- Support for descriptor writeback mode (required by ixlv(4) for AVF support)
- Ability to disable firmware LLDP agent by user (PR 221530)
- Fix for TX queue hang when using TSO (PR 221919)
- Separate descriptor ring sizes for TX and RX rings

PR:		221530, 221919
Submitted by:	Krzysztof Galazka <krzysztof.galazka@intel.com>
Reviewed by:	#IntelNetworking
MFC after:	1 day
Relnotes:	Yes
Sponsored by:	Intel Corporation
Differential Revision:	https://reviews.freebsd.org/D14985

Refresh upstream driver before impending conversion to iflib.

Major new features:

- Support for Fortville-based 25G adapters
- Support for I2C reads/writes

(To prevent getting or sending corrupt data, you should set
dev.ixl.0.debug.disable_fw_link_management=1 when using I2C
[this will disable link!], then set it to 0 when done. The driver implements
the SIOCGI2C ioctl, so ifconfig -v works for reading I2C data,
but there are read_i2c and write_i2c sysctls under the .debug sysctl tree
[the latter being useful for upper page support in QSFP+]).

- Addition of an iWARP client interface (so the future iWARP driver for
  X722 devices can communicate with the base driver).
  - Compiling this option in is enabled by default, with "options IXL_IW" in
    GENERIC.

Differential Revision:	https://reviews.freebsd.org/D9227
Reviewed by:	sbruno
MFC after:	2 weeks
Sponsored by:	Intel Corporation

in GENERIC.

Fixup #ifdef RSS code blocks so that they build and add/delete variables
that were missesd during the creation of this code.

This code is untested and should have a big red warning on it.

Reported by:	npn@
MFC after:	2 days

Submitted by:	erj
Reviewed by:	jeffrey.e.pieper@intel.com
MFC after:	3 days
Sponsored by:	Intel Corporation
Differential Revision:	https://reviews.freebsd.org/D7391

Changes by author:

Eric Joyner		ixl: Fix compile error when IXL_DEBUG is defined.
Eric Joyner		ixl: Fix taskqueues created in init() not being freed in stop().
Eric Joyner		ixl: Add additional debug sysctls, for Tx and Rx queue stats.
Eric Joyner		ixl: Enable dynamic itr by default.
Eric Joyner		ixl: Edit spacing, comments,  function signatures (to conform to style(9)).
Eric Joyner		ixl: Check for errors when tearing down msix interrupts.
Eric Joyner		ixl: Remove unnecessary register reads/writes.
Eric Joyner		ixl: Remove admin queue interrupt enable from general interrupt enable.
Eric Joyner		ixl: Update switch config after teardown/reset flow in init().
Eric Joyner		ixl: Add additional admin queue error code output to admin queue call errors.
Eric Joyner		ixl: Don't destroy i40e spinlock if it's already uninitialized.
Shannon Nelson		i40e-shared: clean event descriptor before use
Anjali Singhai Jain	i40e-shared: When in promisc mode apply promisc mode to Tx Traffic as well
Kevin Scott		i40e_shared: Increase timeout when checking GLGEN_RSTAT_DEVSTATE bit
Eric Joyner		ixlv: Fix IXL_DEBUG compile issue.
Eric Joyner		ixlv: Attempt to fix panic/other issues when rapidly unloading/loading driver.
Eric Joyner		ixl/ixlv: Revert m_collapse() in ixl_xmit() to m_defrag().
Deepthi Kavalur		i40e_shared: Trace logging HW capabilities
Eric Joyner		ixlv: Correctly unlock/relock around init() call in vc_completion().
Eric Joyner		ixl: Stop preventing changing flow control mode for CR4 media.
Eric Joyner		ixl: Set IPv6 TCP offload flag when doing TSO.

Differential Revision:  https://reviews.freebsd.org/D6211
Reviewed by:    sbruno, kmacy, jeffrey.e.pieper@intel.com
MFC after:      2 weeks
Sponsored by:   Intel Corporation