MFC r343291:
Convert vmx(4) to being an iflib driver.

Also, expose IFLIB_MAX_RX_SEGS to iflib drivers and add
iflib_dma_alloc_align() to the iflib API.

Performance is generally better with the tuna

MFC r343291:
Convert vmx(4) to being an iflib driver.

Also, expose IFLIB_MAX_RX_SEGS to iflib drivers and add
iflib_dma_alloc_align() to the iflib API.

Performance is generally better with the tunable/sysctl
dev.vmx.<index>.iflib.tx_abdicate=1.

Reviewed by: shurd
Relnotes: yes
Sponsored by: RG Nets
Differential Revision: https://reviews.freebsd.org/D18761

MFC r343301:
Add missing dependency to vmxnet3 Makefile and clean it up a bit otherwise.

MFC r343688:
Fix interrupt index configuration when using MSI interrupts.

When in MSI mode, the device was only being configured with one
interrupt index, but it needs two - one for the actual interrupt and
one to park the tx queue at.

Also clarified comments relating to interrupt index assignment.

Reported by: Yuri Pankov <[email protected]>

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sys/modules: normalize .CURDIR-relative paths to SRCTOP

This simplifies make output/logic

Tested with: `cd sys/modules; make ALL_MODULES=` on amd64
MFC after: 1 month
Sponsored by: Dell EMC Isilon

Move most of the 15 variations on generating opt_inet.h and
opt_inet6.h into kmod.mk by forcing almost everybody to eat the same
dogfood. While at it, consolidate the opt_bpf.h and opt_mroute.h
targe

Move most of the 15 variations on generating opt_inet.h and
opt_inet6.h into kmod.mk by forcing almost everybody to eat the same
dogfood. While at it, consolidate the opt_bpf.h and opt_mroute.h
targets here too.

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Use src.opts.mk in preference to bsd.own.mk except where we need stuff
from the latter.

Add Tx/Rx multiqueue support to vmx(4)

As a prerequisite for multiple queues, the guest must have MSIX enabled.
Unfortunately, to work around device passthrough bugs, FreeBSD disables
MSIX when runn

Add Tx/Rx multiqueue support to vmx(4)

As a prerequisite for multiple queues, the guest must have MSIX enabled.
Unfortunately, to work around device passthrough bugs, FreeBSD disables
MSIX when running as a VMWare guest due to the hw.pci.honor_msi_blacklist
tunable; this tunable must be disabled for multiple queues.

Also included is various minor changes from the projects/vmxnet branch.

MFC after: 1 month

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Include bsd.own.mk before trying to check MK_* values.

Add vmx(4), a VMware VMXNET3 ethernet driver ported from OpenBSD