summaryrefslogtreecommitdiffstats
path: root/Documentation/ABI/testing/sysfs-bus-cdx
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/ABI/testing/sysfs-bus-cdx')
-rw-r--r--Documentation/ABI/testing/sysfs-bus-cdx66
1 files changed, 62 insertions, 4 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-cdx b/Documentation/ABI/testing/sysfs-bus-cdx
index 7af477f499..8c067ff99e 100644
--- a/Documentation/ABI/testing/sysfs-bus-cdx
+++ b/Documentation/ABI/testing/sysfs-bus-cdx
@@ -28,14 +28,57 @@ Description:
of a device manufacturer.
Combination of Vendor ID and Device ID identifies a device.
+What: /sys/bus/cdx/devices/.../subsystem_vendor
+Date: July 2023
+Contact: puneet.gupta@amd.com
+Description:
+ Subsystem Vendor ID for this CDX device, in hexadecimal.
+ Subsystem Vendor ID is 16 bit identifier specific to the
+ card manufacturer.
+
+What: /sys/bus/cdx/devices/.../subsystem_device
+Date: July 2023
+Contact: puneet.gupta@amd.com
+Description:
+ Subsystem Device ID for this CDX device, in hexadecimal
+ Subsystem Device ID is 16 bit identifier specific to the
+ card manufacturer.
+
+What: /sys/bus/cdx/devices/.../class
+Date: July 2023
+Contact: puneet.gupta@amd.com
+Description:
+ This file contains the class of the CDX device, in hexadecimal.
+ Class is 24 bit identifier specifies the functionality of the device.
+
+What: /sys/bus/cdx/devices/.../revision
+Date: July 2023
+Contact: puneet.gupta@amd.com
+Description:
+ This file contains the revision field of the CDX device, in hexadecimal.
+ Revision is 8 bit revision identifier of the device.
+
+What: /sys/bus/cdx/devices/.../enable
+Date: October 2023
+Contact: abhijit.gangurde@amd.com
+Description:
+ CDX bus should be disabled before updating the devices in FPGA.
+ Writing n/0/off will attempt to disable the CDX bus and.
+ writing y/1/on will attempt to enable the CDX bus. Reading this file
+ gives the current state of the bus, 1 for enabled and 0 for disabled.
+
+ For example::
+
+ # echo 1 > /sys/bus/cdx/.../enable
+
What: /sys/bus/cdx/devices/.../reset
Date: March 2023
Contact: nipun.gupta@amd.com
Description:
- Writing y/1/on to this file resets the CDX device.
- On resetting the device, the corresponding driver is notified
- twice, once before the device is being reset, and again after
- the reset has been complete.
+ Writing y/1/on to this file resets the CDX device or all devices
+ on the bus. On resetting the device, the corresponding driver is
+ notified twice, once before the device is being reset, and again
+ after the reset has been complete.
For example::
@@ -54,3 +97,18 @@ Description:
For example::
# echo 1 > /sys/bus/cdx/devices/.../remove
+
+What: /sys/bus/cdx/devices/.../modalias
+Date: July 2023
+Contact: nipun.gupta@amd.com
+Description:
+ This attribute indicates the CDX ID of the device.
+ That is in the format:
+ cdx:vXXXXdXXXXsvXXXXsdXXXXcXXXXXX,
+ where:
+
+ - vXXXX contains the vendor ID;
+ - dXXXX contains the device ID;
+ - svXXXX contains the subsystem vendor ID;
+ - sdXXXX contains the subsystem device ID;
+ - cXXXXXX contains the device class.