| What: /sys/class/mic/ |
| Date: October 2013 |
| KernelVersion: 3.13 |
| Contact: Sudeep Dutt <sudeep.dutt@intel.com> |
| 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 <sudeep.dutt@intel.com> |
| 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 <sudeep.dutt@intel.com> |
| 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 <sudeep.dutt@intel.com> |
| 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 <sudeep.dutt@intel.com> |
| 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 <sudeep.dutt@intel.com> |
| 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 <sudeep.dutt@intel.com> |
| 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 <sudeep.dutt@intel.com> |
| 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 <sudeep.dutt@intel.com> |
| 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 <sudeep.dutt@intel.com> |
| 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 <sudeep.dutt@intel.com> |
| 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 <sudeep.dutt@intel.com> |
| 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 <ashutosh.dixit@intel.com> |
| 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. |
