122 lines
3.8 KiB
Plaintext
122 lines
3.8 KiB
Plaintext
What: /sys/bus/cdx/rescan
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Date: March 2023
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Contact: nipun.gupta@amd.com
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Description:
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Writing y/1/on to this file will cause rescan of the bus
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and devices on the CDX bus. Any new devices are scanned and
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added to the list of Linux devices and any devices removed are
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also deleted from Linux.
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For example::
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# echo 1 > /sys/bus/cdx/rescan
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What: /sys/bus/cdx/devices/.../vendor
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Date: March 2023
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Contact: nipun.gupta@amd.com
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Description:
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Vendor ID for this CDX device, in hexadecimal. Vendor ID is
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16 bit identifier which is specific to the device manufacturer.
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Combination of Vendor ID and Device ID identifies a device.
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What: /sys/bus/cdx/devices/.../device
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Date: March 2023
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Contact: nipun.gupta@amd.com
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Description:
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Device ID for this CDX device, in hexadecimal. Device ID is
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16 bit identifier to identify a device type within the range
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of a device manufacturer.
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Combination of Vendor ID and Device ID identifies a device.
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What: /sys/bus/cdx/devices/.../subsystem_vendor
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Date: July 2023
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Contact: puneet.gupta@amd.com
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Description:
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Subsystem Vendor ID for this CDX device, in hexadecimal.
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Subsystem Vendor ID is 16 bit identifier specific to the
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card manufacturer.
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What: /sys/bus/cdx/devices/.../subsystem_device
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Date: July 2023
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Contact: puneet.gupta@amd.com
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Description:
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Subsystem Device ID for this CDX device, in hexadecimal
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Subsystem Device ID is 16 bit identifier specific to the
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card manufacturer.
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What: /sys/bus/cdx/devices/.../class
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Date: July 2023
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Contact: puneet.gupta@amd.com
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Description:
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This file contains the class of the CDX device, in hexadecimal.
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Class is 24 bit identifier specifies the functionality of the device.
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What: /sys/bus/cdx/devices/.../revision
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Date: July 2023
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Contact: puneet.gupta@amd.com
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Description:
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This file contains the revision field of the CDX device, in hexadecimal.
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Revision is 8 bit revision identifier of the device.
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What: /sys/bus/cdx/devices/.../enable
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Date: October 2023
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Contact: abhijit.gangurde@amd.com
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Description:
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CDX bus should be disabled before updating the devices in FPGA.
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Writing n/0/off will attempt to disable the CDX bus and.
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writing y/1/on will attempt to enable the CDX bus. Reading this file
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gives the current state of the bus, 1 for enabled and 0 for disabled.
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For example::
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# echo 1 > /sys/bus/cdx/.../enable
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What: /sys/bus/cdx/devices/.../reset
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Date: March 2023
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Contact: nipun.gupta@amd.com
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Description:
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Writing y/1/on to this file resets the CDX device or all devices
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on the bus. On resetting the device, the corresponding driver is
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notified twice, once before the device is being reset, and again
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after the reset has been complete.
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For example::
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# echo 1 > /sys/bus/cdx/.../reset
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What: /sys/bus/cdx/devices/.../remove
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Date: March 2023
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Contact: tarak.reddy@amd.com
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Description:
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Writing y/1/on to this file removes the corresponding
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device from the CDX bus. If the device is to be reconfigured
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reconfigured in the Hardware, the device can be removed, so
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that the device driver does not access the device while it is
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being reconfigured.
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For example::
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# echo 1 > /sys/bus/cdx/devices/.../remove
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What: /sys/bus/cdx/devices/.../resource<N>
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Date: July 2023
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Contact: puneet.gupta@amd.com
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Description:
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The resource binary file contains the content of the memory
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regions. These files can be m'maped from userspace.
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What: /sys/bus/cdx/devices/.../modalias
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Date: July 2023
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Contact: nipun.gupta@amd.com
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Description:
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This attribute indicates the CDX ID of the device.
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That is in the format:
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cdx:vXXXXdXXXXsvXXXXsdXXXXcXXXXXX,
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where:
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- vXXXX contains the vendor ID;
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- dXXXX contains the device ID;
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- svXXXX contains the subsystem vendor ID;
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- sdXXXX contains the subsystem device ID;
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- cXXXXXX contains the device class.
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