What: /sys/class/mic/
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <[email protected]>
Description:
The mic class directory belongs to Intel MIC devices and
provides information per MIC device. An Intel MIC device is a
PCIe form factor add-in Coprocessor card based on the Intel Many
Integrated Core (MIC) architecture that runs a Linux OS.
What: /sys/class/mic/mic<X>
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <[email protected]>
Description:
The directories /sys/class/mic/mic0, /sys/class/mic/mic1 etc.,
represent MIC devices (0,1,..etc). Each directory has
information specific to that MIC device.
What: /sys/class/mic/mic<X>/family
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <[email protected]>
Description:
Provides information about the Coprocessor family for an Intel
MIC device. For example - "x100"
What: /sys/class/mic/mic<X>/stepping
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <[email protected]>
Description:
Provides information about the silicon stepping for an Intel
MIC device. For example - "A0" or "B0"
What: /sys/class/mic/mic<X>/state
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <[email protected]>
Description:
When read, this entry provides the current state of an Intel
MIC device in the context of the card OS. Possible values that
will be read are:
=============== ===============================================
"ready" The MIC device is ready to boot the card OS.
On reading this entry after an OSPM resume,
a "boot" has to be written to this entry if
the card was previously shutdown during OSPM
suspend.
"booting" The MIC device has initiated booting a card OS.
"online" The MIC device has completed boot and is online
"shutting_down" The card OS is shutting down.
"resetting" A reset has been initiated for the MIC device
"reset_failed" The MIC device has failed to reset.
=============== ===============================================
When written, this sysfs entry triggers different state change
operations depending upon the current state of the card OS.
Acceptable values are:
========== ===================================================
"boot" Boot the card OS image specified by the combination
of firmware, ramdisk, cmdline and bootmode
sysfs entries.
"reset" Initiates device reset.
"shutdown" Initiates card OS shutdown.
========== ===================================================
What: /sys/class/mic/mic<X>/shutdown_status
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <[email protected]>
Description:
An Intel MIC device runs a Linux OS during its operation. This
OS can shutdown because of various reasons. When read, this
entry provides the status on why the card OS was shutdown.
Possible values are:
========== ===================================================
"nop" shutdown status is not applicable, when the card OS
is "online"
"crashed" Shutdown because of a HW or SW crash.
"halted" Shutdown because of a halt command.
"poweroff" Shutdown because of a poweroff command.
"restart" Shutdown because of a restart command.
========== ===================================================
What: /sys/class/mic/mic<X>/cmdline
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <[email protected]>
Description:
An Intel MIC device runs a Linux OS during its operation. Before
booting this card OS, it is possible to pass kernel command line
options to configure various features in it, similar to
self-bootable machines. When read, this entry provides
information about the current kernel command line options set to
boot the card OS. This entry can be written to change the
existing kernel command line options. Typically, the user would
want to read the current command line options, append new ones
or modify existing ones and then write the whole kernel command
line back to this entry.
What: /sys/class/mic/mic<X>/firmware
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <[email protected]>
Description:
When read, this sysfs entry provides the path name under
/lib/firmware/ where the firmware image to be booted on the
card can be found. The entry can be written to change the
firmware image location under /lib/firmware/.
What: /sys/class/mic/mic<X>/ramdisk
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <[email protected]>
Description:
When read, this sysfs entry provides the path name under
/lib/firmware/ where the ramdisk image to be used during card
OS boot can be found. The entry can be written to change
the ramdisk image location under /lib/firmware/.
What: /sys/class/mic/mic<X>/bootmode
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <[email protected]>
Description:
When read, this sysfs entry provides the current bootmode for
the card. This sysfs entry can be written with the following
valid strings:
a) linux - Boot a Linux image.
b) flash - Boot an image for flash updates.
What: /sys/class/mic/mic<X>/log_buf_addr
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <[email protected]>
Description:
An Intel MIC device runs a Linux OS during its operation. For
debugging purpose and early kernel boot messages, the user can
access the card OS log buffer via debugfs. When read, this entry
provides the kernel virtual address of the buffer where the card
OS log buffer can be read. This entry is written by the host
configuration daemon to set the log buffer address. The correct
log buffer address to be written can be found in the System.map
file of the card OS.
What: /sys/class/mic/mic<X>/log_buf_len
Date: October 2013
KernelVersion: 3.13
Contact: Sudeep Dutt <[email protected]>
Description:
An Intel MIC device runs a Linux OS during its operation. For
debugging purpose and early kernel boot messages, the user can
access the card OS log buffer via debugfs. When read, this entry
provides the kernel virtual address where the card OS log buffer
length can be read. This entry is written by host configuration
daemon to set the log buffer length address. The correct log
buffer length address to be written can be found in the
System.map file of the card OS.
What: /sys/class/mic/mic<X>/heartbeat_enable
Date: March 2015
KernelVersion: 4.4
Contact: Ashutosh Dixit <[email protected]>
Description:
The MIC drivers detect and inform user space about card crashes
via a heartbeat mechanism (see the description of
shutdown_status above). User space can turn off this
notification by setting heartbeat_enable to 0 and enable it by
setting this entry to 1. If this notification is disabled it is
the responsibility of user space to detect card crashes via
alternative means such as a network ping. This setting is
enabled by default.
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