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Documentation/ABI/testing/configfs-usb-gadget-mass-storage
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| What: /config/usb-gadget/gadget/functions/mass_storage.name | ||
| Date: Oct 2013 | ||
| KenelVersion: 3.13 | ||
| Description: | ||
| The attributes: | ||
|
|
||
| stall - Set to permit function to halt bulk endpoints. | ||
| Disabled on some USB devices known not to work | ||
| correctly. You should set it to true. | ||
| num_buffers - Number of pipeline buffers. Valid numbers | ||
| are 2..4. Available only if | ||
| CONFIG_USB_GADGET_DEBUG_FILES is set. | ||
|
|
||
| What: /config/usb-gadget/gadget/functions/mass_storage.name/lun.name | ||
| Date: Oct 2013 | ||
| KenelVersion: 3.13 | ||
| Description: | ||
| The attributes: | ||
|
|
||
| file - The path to the backing file for the LUN. | ||
| Required if LUN is not marked as removable. | ||
| ro - Flag specifying access to the LUN shall be | ||
| read-only. This is implied if CD-ROM emulation | ||
| is enabled as well as when it was impossible | ||
| to open "filename" in R/W mode. | ||
| removable - Flag specifying that LUN shall be indicated as | ||
| being removable. | ||
| cdrom - Flag specifying that LUN shall be reported as | ||
| being a CD-ROM. | ||
| nofua - Flag specifying that FUA flag | ||
| in SCSI WRITE(10,12) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,157 @@ | ||
| 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: | ||
| "offline" - 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. | ||
| "online" - The MIC device has initiated booting a card OS. | ||
| "shutting_down" - The card OS is shutting down. | ||
| "reset_failed" - The MIC device has failed to reset. | ||
| "suspending" - The MIC device is currently being prepared for | ||
| suspend. On reading this entry, a "suspend" has to be written | ||
| to the state sysfs entry to ensure the card is shutdown during | ||
| OSPM suspend. | ||
| "suspended" - The MIC device has been suspended. | ||
|
|
||
| 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. | ||
| "suspend" - Initiates card OS shutdown and also marks the card | ||
| as suspended. | ||
|
|
||
| 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) elf - Boot an elf 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. |
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