LinuxKPI: add __ffs64()

Add __ffs64() to linux/bitops.h needed by a driver.

Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D34225

(cherry picked from commit d17b78aa142d7

LinuxKPI: add __ffs64()

Add __ffs64() to linux/bitops.h needed by a driver.

Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D34225

(cherry picked from commit d17b78aa142d7c63490c7a2c3f202ef99fffad70)

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LinuxKPI: Constantly use _LINUXKPI_ prefix in include guards

MFC after: 1 week
Reviewed by: bz, emaste, hselasky, manu
Differential Revision: https://reviews.freebsd.org/D33562

(cherry picked from

LinuxKPI: Constantly use _LINUXKPI_ prefix in include guards

MFC after: 1 week
Reviewed by: bz, emaste, hselasky, manu
Differential Revision: https://reviews.freebsd.org/D33562

(cherry picked from commit 307f78f3ed90a4145eeb2c8cc79bc95b2666f57a)

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LinuxKPI: add sign_extend32()

Add sign_extend32() replicating the 64 version. This is needed by
the rtw88 driver.

(cherry picked from commit ea4dea83944ac6334d31e0364dd674eda250adde)

LinuxKPI: add HWEIGHT32()

Add HWEIGHT32() macro needed by iwlwifi and while here add the 8/16/64
variants likewise.

Sponsored by: The FreeBSD Foundation
Reviewed by: hselasky
Differential Revision:

LinuxKPI: add HWEIGHT32()

Add HWEIGHT32() macro needed by iwlwifi and while here add the 8/16/64
variants likewise.

Sponsored by: The FreeBSD Foundation
Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D30501

(cherry picked from commit 4cc8a9da491d10f1b4bad6a50730b67dd5e899c7)

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Prefer using the MIN() function macro over the min() inline function
in the LinuxKPI. Linux defines min() to be a macro, while in FreeBSD
min() is a static inline function clamping its arguments to
"

Prefer using the MIN() function macro over the min() inline function
in the LinuxKPI. Linux defines min() to be a macro, while in FreeBSD
min() is a static inline function clamping its arguments to
"unsigned int".

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

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Use atomic_clear_rel_long() to implement clear_bit_unlock() in the LinuxKPI
after r363842.

Suggested by: alc@
MFC after: 1 week
Sponsored by: Mellanox Technologies

linuxkpi: Add clear_bit_unlock

This calls clear_bit and adds a memory barrier.

Sponsored by: The FreeBSD Foundation

Reviewed by: hselasky
MFC after: 1 week
Differential Revision: https://reviews.f

linuxkpi: Add clear_bit_unlock

This calls clear_bit and adds a memory barrier.

Sponsored by: The FreeBSD Foundation

Reviewed by: hselasky
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D25943

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Allow test_bit() in the LinuxKPI to accept a const pointer.

MFC after: 1 week
Sponsored by: Mellanox Technologies

Implement BITS_PER_TYPE() function macro in the LinuxKPI.
Fix some style while at it.

Submitted by: Johannes Lundberg <[email protected]>
MFC after: 1 week
Sponsored by: Limelight Networks
Spons

Implement BITS_PER_TYPE() function macro in the LinuxKPI.
Fix some style while at it.

Submitted by: Johannes Lundberg <[email protected]>
MFC after: 1 week
Sponsored by: Limelight Networks
Sponsored by: Mellanox Technologies

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Use atomic_fcmpset_XXX() instead of atomic_cmpset_XXX() when possible
in the LinuxKPI.

Suggested by: mjg @
MFC after: 1 week
Sponsored by: Mellanox Technologies

linuxkpi whitespace cleanup

Reviewed by: hselasky, markj
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D14807

Implement for_each_clear_bit() function macro in the LinuxKPI.

MFC after: 1 week
Submitted by: Johannes Lundberg <[email protected]>
Sponsored by: Mellanox Technologies
Sponsored by: Limelight Netw

Implement for_each_clear_bit() function macro in the LinuxKPI.

MFC after: 1 week
Submitted by: Johannes Lundberg <[email protected]>
Sponsored by: Mellanox Technologies
Sponsored by: Limelight Networks

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Implement GENMASK_ULL() function macro in the LinuxKPI.

MFC after: 1 week
Submitted by: Johannes Lundberg <[email protected]>
Sponsored by: Mellanox Technologies
Sponsored by: Limelight Networks

The LinuxKPI atomics do not have acquire nor release semantics unless
specified. Fix code to use READ_ONCE() and WRITE_ONCE() where appropriate.

Suggested by: kib @
MFC after: 1 week
Sponsored by:

The LinuxKPI atomics do not have acquire nor release semantics unless
specified. Fix code to use READ_ONCE() and WRITE_ONCE() where appropriate.

Suggested by: kib @
MFC after: 1 week
Sponsored by: Mellanox Technologies

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Cleanup the bitmap_xxx() functions in the LinuxKPI:

- Move all bitmap related functions from bitops.h to bitmap.h, similar
to what Linux does.

- Apply some minor code cleanup and simplifications

Cleanup the bitmap_xxx() functions in the LinuxKPI:

- Move all bitmap related functions from bitops.h to bitmap.h, similar
to what Linux does.

- Apply some minor code cleanup and simplifications to optimize the
generated code when using static inline functions.

- Implement the following list of bitmap functions which are needed by
drm-next and ibcore:
- bitmap_find_next_zero_area_off()
- bitmap_find_next_zero_area()
- bitmap_or()
- bitmap_and()
- bitmap_xor()

- Add missing include directives to the qlnxe driver
(davidcs@ has been notified)

MFC after: 1 week
Sponsored by: Mellanox Technologies

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Implement more bit operation functions in the LinuxKPI.
Some minor whitespace nits while at it.

Obtained from: kmacy @
MFC after: 1 week
Sponsored by: Mellanox Technologies

Implement BIT_ULL() macro in the LinuxKPI.

MFC after: 1 week
Sponsored by: Mellanox Technologies

Implement __test_and_clear_bit() and __test_and_set_bit() in the LinuxKPI.

The clang compiler will optimise these functions down to three AMD64
instructions if the bit argument is a constant during

Implement __test_and_clear_bit() and __test_and_set_bit() in the LinuxKPI.

The clang compiler will optimise these functions down to three AMD64
instructions if the bit argument is a constant during compilation.

MFC after: 1 week
Sponsored by: Mellanox Technologies

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Make the LinuxKPI task struct persistent accross system calls.

A set of helper functions have been added to manage the life of the
LinuxKPI task struct. When an external system call or task is invok

Make the LinuxKPI task struct persistent accross system calls.

A set of helper functions have been added to manage the life of the
LinuxKPI task struct. When an external system call or task is invoked,
a check is made to create the task struct by demand. A thread
destructor callback is registered to free the task struct when a
thread exits to avoid memory leaks.

This change lays the ground for emulating the Linux kernel more
closely which is a dependency by the code using the LinuxKPI APIs.

Add new dedicated td_lkpi_task field has been added to struct thread
instead of abusing td_retval[1].

Fix some header file inclusions to make LINT kernel build properly
after this change.

Bump the __FreeBSD_version to force a rebuild of all kernel modules.

MFC after: 1 week
Sponsored by: Mellanox Technologies

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Fix some data types and add "inline" keyword for __reg_op() function.

Obtained from: kmacy @
MFC after: 1 week
Sponsored by: Mellanox Technologies

Implement ror32() in the LinuxKPI.

Obtained from: kmacy @
MFC after: 1 week
Sponsored by: Mellanox Technologies

Add support for atomic_long_inc_not_zero() to the LinuxKPI.

Obtained from: kmacy @
MFC after: 1 week
Sponsored by: Mellanox Technologies

Fix bugs in currently unused bit searching loop.

MFC after: 3 days
Sponsored by: Mellanox Technologies

Implement bitmap_weight() and bitmap_equal() for the LinuxKPI.

MFC after: 1 week
Sponsored by: Mellanox Technologies

Make all the LinuxKPI include files compile standalone.

Sponsored by: Mellanox Technologies