1 What: /sys/class/mic/ 2 Date: October 2013 3 KernelVersion: 3.13 4 Contact: Sudeep Dutt <sudeep.dutt@intel.com> 5 Description: 6 The mic class directory belongs to Intel MIC devices and 7 provides information per MIC device. An Intel MIC device is a 8 PCIe form factor add-in Coprocessor card based on the Intel Many 9 Integrated Core (MIC) architecture that runs a Linux OS. 10 11 What: /sys/class/mic/mic<X> 12 Date: October 2013 13 KernelVersion: 3.13 14 Contact: Sudeep Dutt <sudeep.dutt@intel.com> 15 Description: 16 The directories /sys/class/mic/mic0, /sys/class/mic/mic1 etc., 17 represent MIC devices (0,1,..etc). Each directory has 18 information specific to that MIC device. 19 20 What: /sys/class/mic/mic<X>/family 21 Date: October 2013 22 KernelVersion: 3.13 23 Contact: Sudeep Dutt <sudeep.dutt@intel.com> 24 Description: 25 Provides information about the Coprocessor family for an Intel 26 MIC device. For example - "x100" 27 28 What: /sys/class/mic/mic<X>/stepping 29 Date: October 2013 30 KernelVersion: 3.13 31 Contact: Sudeep Dutt <sudeep.dutt@intel.com> 32 Description: 33 Provides information about the silicon stepping for an Intel 34 MIC device. For example - "A0" or "B0" 35 36 What: /sys/class/mic/mic<X>/state 37 Date: October 2013 38 KernelVersion: 3.13 39 Contact: Sudeep Dutt <sudeep.dutt@intel.com> 40 Description: 41 When read, this entry provides the current state of an Intel 42 MIC device in the context of the card OS. Possible values that 43 will be read are: 44 45 46 =============== =============================================== 47 "ready" The MIC device is ready to boot the card OS. 48 On reading this entry after an OSPM resume, 49 a "boot" has to be written to this entry if 50 the card was previously shutdown during OSPM 51 suspend. 52 "booting" The MIC device has initiated booting a card OS. 53 "online" The MIC device has completed boot and is online 54 "shutting_down" The card OS is shutting down. 55 "resetting" A reset has been initiated for the MIC device 56 "reset_failed" The MIC device has failed to reset. 57 =============== =============================================== 58 59 When written, this sysfs entry triggers different state change 60 operations depending upon the current state of the card OS. 61 Acceptable values are: 62 63 64 ========== =================================================== 65 "boot" Boot the card OS image specified by the combination 66 of firmware, ramdisk, cmdline and bootmode 67 sysfs entries. 68 "reset" Initiates device reset. 69 "shutdown" Initiates card OS shutdown. 70 ========== =================================================== 71 72 What: /sys/class/mic/mic<X>/shutdown_status 73 Date: October 2013 74 KernelVersion: 3.13 75 Contact: Sudeep Dutt <sudeep.dutt@intel.com> 76 Description: 77 An Intel MIC device runs a Linux OS during its operation. This 78 OS can shutdown because of various reasons. When read, this 79 entry provides the status on why the card OS was shutdown. 80 Possible values are: 81 82 ========== =================================================== 83 "nop" shutdown status is not applicable, when the card OS 84 is "online" 85 "crashed" Shutdown because of a HW or SW crash. 86 "halted" Shutdown because of a halt command. 87 "poweroff" Shutdown because of a poweroff command. 88 "restart" Shutdown because of a restart command. 89 ========== =================================================== 90 91 What: /sys/class/mic/mic<X>/cmdline 92 Date: October 2013 93 KernelVersion: 3.13 94 Contact: Sudeep Dutt <sudeep.dutt@intel.com> 95 Description: 96 An Intel MIC device runs a Linux OS during its operation. Before 97 booting this card OS, it is possible to pass kernel command line 98 options to configure various features in it, similar to 99 self-bootable machines. When read, this entry provides 100 information about the current kernel command line options set to 101 boot the card OS. This entry can be written to change the 102 existing kernel command line options. Typically, the user would 103 want to read the current command line options, append new ones 104 or modify existing ones and then write the whole kernel command 105 line back to this entry. 106 107 What: /sys/class/mic/mic<X>/firmware 108 Date: October 2013 109 KernelVersion: 3.13 110 Contact: Sudeep Dutt <sudeep.dutt@intel.com> 111 Description: 112 When read, this sysfs entry provides the path name under 113 /lib/firmware/ where the firmware image to be booted on the 114 card can be found. The entry can be written to change the 115 firmware image location under /lib/firmware/. 116 117 What: /sys/class/mic/mic<X>/ramdisk 118 Date: October 2013 119 KernelVersion: 3.13 120 Contact: Sudeep Dutt <sudeep.dutt@intel.com> 121 Description: 122 When read, this sysfs entry provides the path name under 123 /lib/firmware/ where the ramdisk image to be used during card 124 OS boot can be found. The entry can be written to change 125 the ramdisk image location under /lib/firmware/. 126 127 What: /sys/class/mic/mic<X>/bootmode 128 Date: October 2013 129 KernelVersion: 3.13 130 Contact: Sudeep Dutt <sudeep.dutt@intel.com> 131 Description: 132 When read, this sysfs entry provides the current bootmode for 133 the card. This sysfs entry can be written with the following 134 valid strings: 135 a) linux - Boot a Linux image. 136 b) flash - Boot an image for flash updates. 137 138 What: /sys/class/mic/mic<X>/log_buf_addr 139 Date: October 2013 140 KernelVersion: 3.13 141 Contact: Sudeep Dutt <sudeep.dutt@intel.com> 142 Description: 143 An Intel MIC device runs a Linux OS during its operation. For 144 debugging purpose and early kernel boot messages, the user can 145 access the card OS log buffer via debugfs. When read, this entry 146 provides the kernel virtual address of the buffer where the card 147 OS log buffer can be read. This entry is written by the host 148 configuration daemon to set the log buffer address. The correct 149 log buffer address to be written can be found in the System.map 150 file of the card OS. 151 152 What: /sys/class/mic/mic<X>/log_buf_len 153 Date: October 2013 154 KernelVersion: 3.13 155 Contact: Sudeep Dutt <sudeep.dutt@intel.com> 156 Description: 157 An Intel MIC device runs a Linux OS during its operation. For 158 debugging purpose and early kernel boot messages, the user can 159 access the card OS log buffer via debugfs. When read, this entry 160 provides the kernel virtual address where the card OS log buffer 161 length can be read. This entry is written by host configuration 162 daemon to set the log buffer length address. The correct log 163 buffer length address to be written can be found in the 164 System.map file of the card OS. 165 166 What: /sys/class/mic/mic<X>/heartbeat_enable 167 Date: March 2015 168 KernelVersion: 4.4 169 Contact: Ashutosh Dixit <ashutosh.dixit@intel.com> 170 Description: 171 The MIC drivers detect and inform user space about card crashes 172 via a heartbeat mechanism (see the description of 173 shutdown_status above). User space can turn off this 174 notification by setting heartbeat_enable to 0 and enable it by 175 setting this entry to 1. If this notification is disabled it is 176 the responsibility of user space to detect card crashes via 177 alternative means such as a network ping. This setting is 178 enabled by default.
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