LinuxKPI: import beginning of a new version of netdevice.h

Import a netdevice update complementing the last remaining bits of
the old ifnet derived implementation. Along add a (for now) task
based

LinuxKPI: import beginning of a new version of netdevice.h

Import a netdevice update complementing the last remaining bits of
the old ifnet derived implementation. Along add a (for now) task
based NAPI implementation.

This is the minimal set of chnages which are needed for the initial
support of wireless drivers. The NAPI implementation has an option to
still switch to "direct dispatch" as it had been used by these drivers
before not relying on a deferred context along with some printf tracing.
This has been helpful in the last weeks for debugging and will be
cleaned once we have had broader testing and are sure this is fine as-is.
Should we need a more time-sensitive or load-sensitive response
in the future we can always switch to something more sophisticated.

Sponsored by: The FreeBSD Foundation
X-Differential Revision: D33075 (abandoned without feedback a while ago)

(cherry picked from commit d105895844848ddba85d686e03e0d14c03ad4eb4)

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LinuxKPI: add KPI for netdev_notifier_info returning ifp

While currently the ifp gets cast to a net_device and then returned
and consumers are expecting an ifp again, allow parallel usage now and
in

LinuxKPI: add KPI for netdev_notifier_info returning ifp

While currently the ifp gets cast to a net_device and then returned
and consumers are expecting an ifp again, allow parallel usage now and
in the future by extending and also passing the ifp directly back in
the netdev_notifier_info. Add a function to return the ifp instead of
the net_device.

Sponsored by: The FreeBSD Foundation
Suggested by: hselasky
Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D30522

(cherry picked from commit 801cf532e70f6b0ebfb2d536b235f166b2e6f0a4)

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LinuxKPI: netdevice.h remove more ifnet operating macros

Now that mlx4 and ofed either are operating on ifnet functions
directly or have a private copy of these macros, we can remove them
from linux

LinuxKPI: netdevice.h remove more ifnet operating macros

Now that mlx4 and ofed either are operating on ifnet functions
directly or have a private copy of these macros, we can remove them
from linux/netdevice.h.
With this only the #define for net_device to ifnet is left.

Sponsored by: The FreeBSD Foundation
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D30478

(cherry picked from commit 9b6835f3ab7f05728caeaaa2ade09e80f1c5e825)

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LinuxKPI/OFED/mlx4: cleanup netdevice.h some more

This removes all unused bits from linux/netdevice.h and migrates two
inline functions into the mlx4 and ofed code respectively.

This gets the mlx4/

LinuxKPI/OFED/mlx4: cleanup netdevice.h some more

This removes all unused bits from linux/netdevice.h and migrates two
inline functions into the mlx4 and ofed code respectively.

This gets the mlx4/ofed (struct ifnet) specific bits down to 7 lines
in netdevice.h.

Sponsored by: The FreeBSD Foundation
Reviewed by: hselasky, kib
Differential Revision: https://reviews.freebsd.org/D30461

(cherry picked from commit c35034b338eb4de6fb42fd855865bce21c81a225)

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LinuxKPI: netdevice notifier callback argument

Introduce struct netdev_notifier_info as a container to pass
net_device to the callback functions.
Adjust netdev_notifier_info_to_dev() to return the n

LinuxKPI: netdevice notifier callback argument

Introduce struct netdev_notifier_info as a container to pass
net_device to the callback functions.
Adjust netdev_notifier_info_to_dev() to return the net_device field.

Add explicit casts from ifp to ni->dev even though currently
struct net_device is defined to struct ifnet. This is needed in
preparation for untangling this and improving the net_device compat
code.

Sponsored by: The FreeBSD Foundation
Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D29365

(cherry picked from commit fdcfe8a298e23bef9588cafad2672e0c5f48a327)

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Fix missing epochification of the LinuxKPI after r353292.

Sponsored by: Mellanox Technologies

linuxkpi: properly implement netif_carrier_ok().

Submitted by: kib@
Approved by: hselasky (mentor)
MFC after: 1 week
Sponsored by: Mellanox Technologies

Add basic support for VIMAGE to the LinuxKPI and ibcore.

Support is implemented by mapping Linux's "struct net" into FreeBSD's
"struct vnet". Currently only vnet0 is supported by ibcore.

MFC after:

Add basic support for VIMAGE to the LinuxKPI and ibcore.

Support is implemented by mapping Linux's "struct net" into FreeBSD's
"struct vnet". Currently only vnet0 is supported by ibcore.

MFC after: 1 week
Sponsored by: Mellanox Technologies

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Add more network related macros and functions to the LinuxKPI.

MFC after: 1 week
Sponsored by: Mellanox Technologies

LinuxKPI style changes:
- Properly prefix internal functions with "linux_" instead of only a
single underscore to avoid future namespace collisions.
- Make some functions global instead of inline t

LinuxKPI style changes:
- Properly prefix internal functions with "linux_" instead of only a
single underscore to avoid future namespace collisions.
- Make some functions global instead of inline to ease debugging and
to avoid unnecessary code duplication.
- Remove no longer existing kthread_create() function's prototype.

MFC after: 1 week
Sponsored by: Mellanox Technologies

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Finish process of moving the LinuxKPI module into the default kernel build.

- Move all files related to the LinuxKPI into sys/compat/linuxkpi and
its subfolders.
- Update sys/conf/files and some M

Finish process of moving the LinuxKPI module into the default kernel build.

- Move all files related to the LinuxKPI into sys/compat/linuxkpi and
its subfolders.
- Update sys/conf/files and some Makefiles to use new file locations.
- Added description of COMPAT_LINUXKPI to sys/conf/NOTES which in turn
adds the LinuxKPI to all LINT builds.
- The LinuxKPI can be added to the kernel by setting the
COMPAT_LINUXKPI option. The OFED kernel option no longer builds the
LinuxKPI into the kernel. This was done to keep the build rules for
the LinuxKPI in sys/conf/files simple.
- Extend the LinuxKPI module to include support for USB by moving the
Linux USB compat from usb.ko to linuxkpi.ko.
- Bump the FreeBSD_version.
- A universe kernel build has been done.

Reviewed by: np @ (cxgb and cxgbe related changes only)
Sponsored by: Mellanox Technologies

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