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devd: Document the nvme devd events

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Nvme informs devd of smart and reset controller events. Document them.

Sponsored by:		Netflix
Differential Revision:	https://reviews.freebsd.org/D44212
This commit is contained in:
Warner Losh 2024-03-06 18:22:39 -07:00
parent 2a2682ee53
commit 6a3877a0e2
1 changed files with 29 additions and 1 deletions
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30
sbin/devd/devd.conf.5
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@ -38,7 +38,7 @@
.\" ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
.\" SOFTWARE.
.\"
.Dd December 1, 2022
.Dd March 6, 2024
.Dt DEVD.CONF 5
.Os
.Sh NAME
@ -481,6 +481,34 @@ Notification that the system has woken from the suspended state.
.Pp
.Bl -column "System" "Subsystem" "1234567" -compact
.Sy "System" Ta Sy "Subsystem" Ta Sy "Type" Ta Sy "Description"
.It Li nvme Ta Li controller Ta Li SMART_ERROR Ta
A SMART Critical Warning State change has happened.
$state has a hex bitmask of the bits that changed, as defined
in the NVMe Standard for Critical Warning field of log page 2
.Dq SMART / Health Information Log :
.Bl -column "Bit Value" "Meaning" -compact
.Sy "Bit Value" Ta Sy "Meaning"
.It 0x1 Ta Spare capacity below threshold
.It 0x2 Ta Temperature outside acceptable range
.It 0x4 Ta Reliability of media degraded
.It 0x8 Ta Media placed into read-only mode
.It 0x10 Ta Volatime memory backup failure
.It 0x20 Ta Persistent memrory read-only or degraded
.El
.It Li nvme Ta Li controller Ta Li RESET Ta
A controller reset event has happened.
$event is one of
.Dq start ,
.Dq success ,
and
.Dq timed_out
representing the start of a controller reset, the successful completion of a
controller reset, and a timeout while waiting for the controller to reset
respectively.
.El
.Pp
.Bl -column "System" "Subsystem" "1234567" -compact
.Sy "System" Ta Sy "Subsystem" Ta Sy "Type" Ta Sy "Description"
.It Li PMU Ta Ta Ta
Notification of events from various types of Power Management Units.
.It Li PMU Ta Li "AC" Ta Ta