linuxkpi: Move `struct kobject` code to `linux_kobject.c`

[Why]
`linux_compat.c` is already too long. I will need to add `struct kset`
in a follow-up commit, so let's move the existing `struct kobje

linuxkpi: Move `struct kobject` code to `linux_kobject.c`

[Why]
`linux_compat.c` is already too long. I will need to add `struct kset`
in a follow-up commit, so let's move the existing `struct kobject` code
to its own file.

Reviewed by: manu
Approved by: manu
Differential Revision: https://reviews.freebsd.org/D43019

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sys: Remove $FreeBSD$: one-line sh pattern

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

LinuxKPI: define LINUXKPI_INCLUDES for module builds as well

While for in-kernel we already have LINUXKPI_INCLUDES in kern.pre.mk
for kmod builds we've not had a common define to use leading to vari

LinuxKPI: define LINUXKPI_INCLUDES for module builds as well

While for in-kernel we already have LINUXKPI_INCLUDES in kern.pre.mk
for kmod builds we've not had a common define to use leading to various
spellings of include paths.

In order for the include list to be expanded more easily in the future,
e.g., adding the "dummy" includes (for all) and to harmonize code,
duplicate LINUXKPI_INCLUDES to kmod.mk and use it for all module Makefiles.

MFC after: 1 week
Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D36683

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linuxkpi: drm-kmod debugfs support

This diff extends LinuxKPI to support simple attribute files in debugfs.
These simple attributes are an essential component for compiling drm-kmod
with CONFIG_DEBU

linuxkpi: drm-kmod debugfs support

This diff extends LinuxKPI to support simple attribute files in debugfs.
These simple attributes are an essential component for compiling drm-kmod
with CONFIG_DEBUG_FS enabled.
This will allow for easier graphics driver debugging using
Intel's igt-gpu-tools.

Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D35883
Sponsored by: Google, Inc. (GSoC 2022)

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linuxkpi: on i386 only use first_msi_irq if apic is in kernel config

linuxkpi: fix module build outside of kernel build environment

MFC after: 3 days

linuxkpi: Add i2c support

Add i2c support to linuxkpi. This is needed by drm-kmod.
For every i2c_adapter added by i2c_add_adapter we add a child to the
device named "lkpi_iic". This child handle the

linuxkpi: Add i2c support

Add i2c support to linuxkpi. This is needed by drm-kmod.
For every i2c_adapter added by i2c_add_adapter we add a child to the
device named "lkpi_iic". This child handle the conversion between
Linux i2c_msgs to FreeBSD iic_msgs.
For every i2c_adapter added by i2c_bit_add_bus we add a child to the
device named "lkpi_iicbb". This child handle the conversion between
Linux i2c_msgs to FreeBSD iic_msgs.
With the help of iic(4), this expose the i2c controller to userspace
allowing a user to query DDC information from a monitor.
e.g.: i2c -f /dev/iic0 -a 0x28 -c 128 -d r
will query the standard EDID from the monitor if plugged.

The bitbang part (lkpi_iicbb) isn't tested at all for now as I don't have
compatible hardware (all my hardware have native i2c controller).

Tested on: Intel (SandyBridge, Skylake, ApolloLake)
Tested on: AMD (Picasso, Polaris (amd64 and arm64))

MFC after: 1 month
Reviewed by: hselasky
Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D33053

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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
MFC after: 3 days
X-Differential Revision: D33075 (abandoned without feedback a while ago)

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LinuxKPI: add a work-in-progress skbuff implementation

This is a work-in-progress implementation of sk_buff compat code
used for wireless drivers only currently.
Bring in this version of the code as

LinuxKPI: add a work-in-progress skbuff implementation

This is a work-in-progress implementation of sk_buff compat code
used for wireless drivers only currently.
Bring in this version of the code as it has proven to be good enough
to have packets going for a few months.

The current implementation has several drawbacks including the need
for us to copy data between sk_buffs and mbufs.
Do not rely on the internals of this implementation. They are highly
likely to change as we will improve the integration to FreeBSD mbufs.

Sponsored by: The FreeBSD Foundation
MFC after: 3 days

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Fix some modules to export more used symbols

and remove non-present symbols that are now reported by kmod_syms.awk.

Reviewed by: emaste
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differ

Fix some modules to export more used symbols

and remove non-present symbols that are now reported by kmod_syms.awk.

Reviewed by: emaste
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D32878

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LinuxKPI: Remove FreeBSD struct resource from all LKPI headers

except linux/pci.h to avoid conflicts with Linux version.
This allows to #define resource in drm-kmod globally and strip some #ifdef-s

LinuxKPI: Remove FreeBSD struct resource from all LKPI headers

except linux/pci.h to avoid conflicts with Linux version.
This allows to #define resource in drm-kmod globally and strip some #ifdef-s

Reviewed by: hselasky, manu
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D31673

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LinuxKPI: Make FPU sections thread-safe and use the NOCTX flag.

Reviewed by: kib
Submitted by: greg@unrelenting.technology
Differential Revision: https://reviews.freebsd.org/D29921
MFC after: 1 week

LinuxKPI: Make FPU sections thread-safe and use the NOCTX flag.

Reviewed by: kib
Submitted by: greg@unrelenting.technology
Differential Revision: https://reviews.freebsd.org/D29921
MFC after: 1 week
Sponsored by: NVIDIA Networking

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Implement basic support for allocating memory from a specific numa node
in the LinuxKPI.

Differential Revision: https://reviews.freebsd.org/D29077
Reviewed by: markj@ and kib@
MFC after: 1 week
Spon

Implement basic support for allocating memory from a specific numa node
in the LinuxKPI.

Differential Revision: https://reviews.freebsd.org/D29077
Reviewed by: markj@ and kib@
MFC after: 1 week
Sponsored by: Mellanox Technologies // NVIDIA Networking

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LinuxKPI: implement devres() framework parts and two examples

This code implements a version of the devres framework found
working for various iwlwifi use cases and also providing functions
for ttm_

LinuxKPI: implement devres() framework parts and two examples

This code implements a version of the devres framework found
working for various iwlwifi use cases and also providing functions
for ttm_page_alloc_dma.c from DRM.

Part of the framework replicates the consumed KPI, while others
are internal helper functions.

In addition the simple devm_k*malloc() consumers were implemented
and kvasprintf() was enhanced to also work for the devm_kasprintf()
case.
Addmittingly lkpi_devm_kmalloc_release() could be avoided but for
the overall understanding of the code and possible memory tracing
it may still be helpful.

Further devsres consumer are implemented for iwlwifi but will follow
later as the main reason for this change is to sort out overlap with
DRM.

Sponsored-by: The FreeBSD Foundation
Obtained-from: bz_iwlwifi
MFC After: 3 days
Reviewed-by: hselasky, manu
Differential Revision: https://reviews.freebsd.org/D28189

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LinuxKPI: add firmware loading support

Implement linux firmware KPI compat code.
This includes: request_firmware() request_firmware_nowait(),
request_firmware_direct(), firmware_request_nowarn(),
an

LinuxKPI: add firmware loading support

Implement linux firmware KPI compat code.
This includes: request_firmware() request_firmware_nowait(),
request_firmware_direct(), firmware_request_nowarn(),
and release_firmware().

Given we will try to map requested names from natively ported
or full-linuxkpi-using drivers to a firmware(9) auto-loading
name format (.ko file name and image name matching),
we quieten firmware(9) and print success or failure (unless
the _nowarn() version was called) in the linuxkpi implementation.
At the moment we try up-to 4 different naming combinations,
with path stripped, original name, and requested name with '/'
or '.' replaced.

We do not currently defer loading in the "nowait" case.

Sponsored-by: The FreeBSD Foundation
Sponsored-by: Rubicon Communications, LLC ("Netgate")
(firmware(9) nowarn update from D27413)
MFC after: 3 days
Reviewed by: kib, manu (looked at older versions)
Differential Revision: https://reviews.freebsd.org/D27414

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linuxkpi: add kernel_fpu_begin/kernel_fpu_end

With newer AMD GPUs (>=Navi,Renoir) there is FPU context usage in the
amdgpu driver.
The `kernel_fpu_begin/end` implementations in drm did not even allo

linuxkpi: add kernel_fpu_begin/kernel_fpu_end

With newer AMD GPUs (>=Navi,Renoir) there is FPU context usage in the
amdgpu driver.
The `kernel_fpu_begin/end` implementations in drm did not even allow nested
begin-end blocks.

Submitted by: Greg V
Reviewed By: manu, hselasky
Differential Revision: https://reviews.freebsd.org/D28061

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linuxkpi: Add shrinker support

A driver can register a shrinker that will be called when the kernel
wants to free some memory.
Add support for that in linuxkpi and call the registered shrinkers
when

linuxkpi: Add shrinker support

A driver can register a shrinker that will be called when the kernel
wants to free some memory.
Add support for that in linuxkpi and call the registered shrinkers
when the lowmem event is triggered.

Reviewed by: bz
Differential Revision: https://reviews.freebsd.org/D27728

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Add missing header file when building the LinuxKPI module separately.

MFC after: 1 week
Sponsored by: Mellanox Technologies // NVIDIA Networking

LinuxKPI: Implement ACPI bits required by drm-kmod in base system

It includes:

ACPI_HANDLE() implementation.
AC and VIDEO ACPI events notification support.
Replacement of hand-rolled GPLed _DSM met

LinuxKPI: Implement ACPI bits required by drm-kmod in base system

It includes:

ACPI_HANDLE() implementation.
AC and VIDEO ACPI events notification support.
Replacement of hand-rolled GPLed _DSM method evaluation helpers
with in-base ones.

Submitted by: wulf
Differential Revision: https://reviews.freebsd.org/D26603

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linuxkpi: Add dmi_* function

dmi function are used to get smbios values.
The DRM subsystem and drivers use it to enabled (or not) quirks.

Reviewed by: hselasky
Sponsored by: The FreeBSD Foundation

linuxkpi: Add dmi_* function

dmi function are used to get smbios values.
The DRM subsystem and drivers use it to enabled (or not) quirks.

Reviewed by: hselasky
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26046

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MFH

Sponsored by: Rubicon Communications, LLC (netgate.com)

Implement extensible arrays API using the existing radix tree implementation
in the LinuxKPI.

Differential Revision: https://reviews.freebsd.org/D25101
Reviewed by: kib @
MFC after: 1 week
Sponsored

Implement extensible arrays API using the existing radix tree implementation
in the LinuxKPI.

Differential Revision: https://reviews.freebsd.org/D25101
Reviewed by: kib @
MFC after: 1 week
Sponsored by: Mellanox Technologies

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Introduce LINUXKPI_GENSRCS.

Centralize the list of generated files required by linuxkpi consumers,
into the common variable. This way, consumers that use the variable
are insulated from possible ch

Introduce LINUXKPI_GENSRCS.

Centralize the list of generated files required by linuxkpi consumers,
into the common variable. This way, consumers that use the variable
are insulated from possible changes in the list.

Reviewed by: hselasky, imp
Sponsored by: Mellanox Technologies
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D24137

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Add pci_iov_if.h header as a dependency for Linuxkpi consumers.

Sponsored by: Mellanox Technologies
MFC after: 2 weeks

Merge r358179 through r358238.

PR: 244251