MFC r352207:
Use true and false when dealing with bool type in the LinuxKPI.
No functional change.

Sponsored by: Mellanox Technologies

MFC r352206:
Fix synchronous work drain issue in the LinuxKPI.

A work callback may restart itself. Loop in the drain function to see if the
work has been rescheduled and stop the subsequent reschedu

MFC r352206:
Fix synchronous work drain issue in the LinuxKPI.

A work callback may restart itself. Loop in the drain function to see if the
work has been rescheduled and stop the subsequent reschedules, if any.

Sponsored by: Mellanox Technologies

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Implement current_work() function in the LinuxKPI.

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

Declare and set the global "system_highpri_wq" workqueue structure pointer
in the LinuxKPI.

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

Declare and set the global "system_highpri_wq" workqueue structure pointer
in the LinuxKPI.

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

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Correct the return value from flush_work() and flush_delayed_work() in the
LinuxKPI to comply more with Linux. This fixes an issue when these functions
are used in waiting loops.

MFC after: 1 week
S

Correct the return value from flush_work() and flush_delayed_work() in the
LinuxKPI to comply more with Linux. This fixes an issue when these functions
are used in waiting loops.

MFC after: 1 week
Sponsored by: Mellanox Technologies

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Make sure the timer belonging to the delayed work in the LinuxKPI
gets drained before invoking the work function. Else the timer
mutex may still be in use which can lead to use-after-free situations,

Make sure the timer belonging to the delayed work in the LinuxKPI
gets drained before invoking the work function. Else the timer
mutex may still be in use which can lead to use-after-free situations,
because the work function might free the work structure before returning.

MFC after: 1 week
Sponsored by: Mellanox Technologies

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Move some other SI_SUB_INIT_IF initializations to SI_SUB_TASKQ

Drop the EARLY_AP_STARTUP gtaskqueue code, as gtaskqueues are now
initialized before APs are started.

Reviewed by: hselasky@, jhb@
Spo

Move some other SI_SUB_INIT_IF initializations to SI_SUB_TASKQ

Drop the EARLY_AP_STARTUP gtaskqueue code, as gtaskqueues are now
initialized before APs are started.

Reviewed by: hselasky@, jhb@
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D12054

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Fix few issues of LinuxKPI workqueue.

LinuxKPI workqueue wrappers reported "successful" cancellation for works
already completed in normal way. This change brings reported status and
real cancellat

Fix few issues of LinuxKPI workqueue.

LinuxKPI workqueue wrappers reported "successful" cancellation for works
already completed in normal way. This change brings reported status and
real cancellation fact into sync. This required for drm-next operation.

Reviewed by: hselasky (earlier version)
Sponsored by: iXsystems, Inc.
Differential Revision: https://reviews.freebsd.org/D11904

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Zero number of CPUs should be translated into the default number of
CPUs when allocating a LinuxKPI workqueue. This also ensures that the
created taskqueue always have a non-zero number of worker thr

Zero number of CPUs should be translated into the default number of
CPUs when allocating a LinuxKPI workqueue. This also ensures that the
created taskqueue always have a non-zero number of worker threads.

MFC after: 1 week
Sponsored by: Mellanox Technologies

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Don't create any threads before SI_SUB_INIT_IF in the LinuxKPI. Else
kthread_add() will assert it is called too soon. This fixes a startup
issue when COMPAT_LINUXKPI is in enabled the kernel configur

Don't create any threads before SI_SUB_INIT_IF in the LinuxKPI. Else
kthread_add() will assert it is called too soon. This fixes a startup
issue when COMPAT_LINUXKPI is in enabled the kernel configuration
file.

Reported by: Michael Butler <[email protected]>
MFC after: 1 week
Sponsored by: Mellanox Technologies

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Fix compilation warning for powerpc64 by not using const keyword in
return types:

Type qualifiers ignored on function return type [-Wreturn-type]

Reported by: andreast @
MFC after: 1 week
Sponsor

Fix compilation warning for powerpc64 by not using const keyword in
return types:

Type qualifiers ignored on function return type [-Wreturn-type]

Reported by: andreast @
MFC after: 1 week
Sponsored by: Mellanox Technologies

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LinuxKPI workqueue cleanup.

This change makes the workqueue implementation behave more like in
Linux, both functionality wise and structure wise.

All workqueue code has been moved to linux_work.c

LinuxKPI workqueue cleanup.

This change makes the workqueue implementation behave more like in
Linux, both functionality wise and structure wise.

All workqueue code has been moved to linux_work.c

Add an atomic based statemachine to the work_struct to ensure proper
operation. Prior to this change struct_work was directly mapped to a
FreeBSD task. When a taskqueue has multiple threads the same task may
end up being executed on more than one worker thread simultaneously.
This might cause problems with code coming from Linux, which expects
serial behaviour, similar to Linux tasklets.

Move all global workqueue function names into the linux_xxx domain to
avoid symbol name clashes in the future.

Implement a few more workqueue related functions and macros.

Create two multithreaded taskqueues for the LinuxKPI during module
load, one for time-consuming callbacks and one for non-time consuming
callbacks.

MFC after: 1 week
Sponsored by: Mellanox Technologies

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