amdsmu: Sleep entry/exit hints for PMFW

amdsmu_suspend() and amdsmu_resume() for sending hints to the AMD SMU
power management firmware (PMFW) that we are entering and exiting
s2idle. We also dump s

amdsmu: Sleep entry/exit hints for PMFW

amdsmu_suspend() and amdsmu_resume() for sending hints to the AMD SMU
power management firmware (PMFW) that we are entering and exiting
s2idle. We also dump sleep metrics once we tell it we're exiting sleep,
so the relevant metrics are updated.

Register these as acpi_post_dev_suspend and acpi_post_dev_resume
eventhandlers.

Reviewed by: olce
Approved by: olce
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D48721

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amdsmu: Initial work on a driver for the AMD SMU

Start work on a driver for the AMD SMU (system management unit), which
will eventually be used for getting S0ix statistics (e.g. how long the
CPU has

amdsmu: Initial work on a driver for the AMD SMU

Start work on a driver for the AMD SMU (system management unit), which
will eventually be used for getting S0ix statistics (e.g. how long the
CPU has spent in the deepest - S0i3 - sleep state during the last
sleep) as well as letting PMFW (power management firmware, running on
the SMU) know when we intend to enter and exit sleep. It is what's
responsible for actually turning off the VDD line to the CPU.

With this commit, amdsmu is just able to get the SMU's firmware version
on AMD Rembrandt, Phoenix, and Strix Point CPUs.

This is the equivalent to amd-pmc on Linux.

Reviewed by: cem, kib, mckusick
Approved by: kib, mckusick
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D48683

show more ...

amdsmu: Initial work on a driver for the AMD SMU

Start work on a driver for the AMD SMU (system management unit), which
will eventually be used for getting S0ix statistics (e.g. how long the
CPU has

amdsmu: Initial work on a driver for the AMD SMU

Start work on a driver for the AMD SMU (system management unit), which
will eventually be used for getting S0ix statistics (e.g. how long the
CPU has spent in the deepest - S0i3 - sleep state during the last
sleep) as well as letting PMFW (power management firmware, running on
the SMU) know when we intend to enter and exit sleep. It is what's
responsible for actually turning off the VDD line to the CPU.

With this commit, amdsmu is just able to get the SMU's firmware version
on AMD Rembrandt, Phoenix, and Strix Point CPUs.

This is the equivalent to amd-pmc on Linux.

Reviewed by: cem, kib, mckusick
Approved by: kib, mckusick
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D48683

show more ...

amdsmu: Initial work on a driver for the AMD SMU

Start work on a driver for the AMD SMU (system management unit), which
will eventually be used for getting S0ix statistics (e.g. how long the
CPU has

amdsmu: Initial work on a driver for the AMD SMU

Start work on a driver for the AMD SMU (system management unit), which
will eventually be used for getting S0ix statistics (e.g. how long the
CPU has spent in the deepest - S0i3 - sleep state during the last
sleep) as well as letting PMFW (power management firmware, running on
the SMU) know when we intend to enter and exit sleep. It is what's
responsible for actually turning off the VDD line to the CPU.

With this commit, amdsmu is just able to get the SMU's firmware version
on AMD Rembrandt, Phoenix, and Strix Point CPUs.

This is the equivalent to amd-pmc on Linux.

Reviewed by: cem, kib, mckusick
Approved by: kib, mckusick
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D48683

show more ...