371 lines
14 KiB
Plaintext
371 lines
14 KiB
Plaintext
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What: /sys/bus/thunderbolt/devices/.../domainX/boot_acl
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Date: Jun 2018
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KernelVersion: 4.17
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Contact: thunderbolt-software@lists.01.org
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Description: Holds a comma separated list of device unique_ids that
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are allowed to be connected automatically during system
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startup (e.g boot devices). The list always contains
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maximum supported number of unique_ids where unused
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entries are empty. This allows the userspace software
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to determine how many entries the controller supports.
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If there are multiple controllers, each controller has
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its own ACL list and size may be different between the
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controllers.
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System BIOS may have an option "Preboot ACL" or similar
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that needs to be selected before this list is taken into
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consideration.
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Software always updates a full list in each write.
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If a device is authorized automatically during boot its
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boot attribute is set to 1.
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What: /sys/bus/thunderbolt/devices/.../domainX/deauthorization
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Date: May 2021
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KernelVersion: 5.12
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Contact: Mika Westerberg <mika.westerberg@linux.intel.com>
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Description: This attribute tells whether the system supports
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de-authorization of devices. Value of 1 means user can
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de-authorize PCIe tunnel by writing 0 to authorized
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attribute under each device.
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What: /sys/bus/thunderbolt/devices/.../domainX/iommu_dma_protection
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Date: Mar 2019
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KernelVersion: 4.21
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Contact: thunderbolt-software@lists.01.org
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Description: This attribute tells whether the system uses IOMMU
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for DMA protection. Value of 1 means IOMMU is used 0 means
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it is not (DMA protection is solely based on Thunderbolt
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security levels).
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What: /sys/bus/thunderbolt/devices/.../domainX/security
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Date: Sep 2017
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KernelVersion: 4.13
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Contact: thunderbolt-software@lists.01.org
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Description: This attribute holds current Thunderbolt security level
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set by the system BIOS. Possible values are:
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======= ==================================================
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none All devices are automatically authorized
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user Devices are only authorized based on writing
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appropriate value to the authorized attribute
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secure Require devices that support secure connect at
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minimum. User needs to authorize each device.
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dponly Automatically tunnel Display port (and USB). No
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PCIe tunnels are created.
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usbonly Automatically tunnel USB controller of the
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connected Thunderbolt dock (and Display Port). All
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PCIe links downstream of the dock are removed.
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nopcie USB4 system where PCIe tunneling is disabled from
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the BIOS.
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======= ==================================================
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What: /sys/bus/thunderbolt/devices/.../authorized
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Date: Sep 2017
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KernelVersion: 4.13
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Contact: thunderbolt-software@lists.01.org
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Description: This attribute is used to authorize Thunderbolt devices
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after they have been connected. If the device is not
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authorized, no PCIe devices are available to the system.
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Contents of this attribute will be 0 when the device is not
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yet authorized.
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Possible values are supported:
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== ===================================================
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0 The device will be de-authorized (only supported if
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deauthorization attribute under domain contains 1)
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1 The device will be authorized and connected
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== ===================================================
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When key attribute contains 32 byte hex string the possible
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values are:
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== ========================================================
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0 The device will be de-authorized (only supported if
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deauthorization attribute under domain contains 1)
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1 The 32 byte hex string is added to the device NVM and
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the device is authorized.
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2 Send a challenge based on the 32 byte hex string. If the
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challenge response from device is valid, the device is
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authorized. In case of failure errno will be ENOKEY if
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the device did not contain a key at all, and
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EKEYREJECTED if the challenge response did not match.
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== ========================================================
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What: /sys/bus/thunderbolt/devices/.../boot
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Date: Jun 2018
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KernelVersion: 4.17
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Contact: thunderbolt-software@lists.01.org
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Description: This attribute contains 1 if Thunderbolt device was already
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authorized on boot and 0 otherwise.
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What: /sys/bus/thunderbolt/devices/.../generation
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Date: Jan 2020
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KernelVersion: 5.5
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Contact: Christian Kellner <christian@kellner.me>
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Description: This attribute contains the generation of the Thunderbolt
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controller associated with the device. It will contain 4
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for USB4.
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What: /sys/bus/thunderbolt/devices/.../key
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Date: Sep 2017
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KernelVersion: 4.13
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Contact: thunderbolt-software@lists.01.org
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Description: When a devices supports Thunderbolt secure connect it will
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have this attribute. Writing 32 byte hex string changes
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authorization to use the secure connection method instead.
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Writing an empty string clears the key and regular connection
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method can be used again.
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What: /sys/bus/thunderbolt/devices/.../device
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Date: Sep 2017
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KernelVersion: 4.13
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Contact: thunderbolt-software@lists.01.org
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Description: This attribute contains id of this device extracted from
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the device DROM.
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What: /sys/bus/thunderbolt/devices/.../device_name
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Date: Sep 2017
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KernelVersion: 4.13
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Contact: thunderbolt-software@lists.01.org
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Description: This attribute contains name of this device extracted from
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the device DROM.
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What: /sys/bus/thunderbolt/devices/.../maxhopid
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Date: Jul 2021
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KernelVersion: 5.13
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Contact: Mika Westerberg <mika.westerberg@linux.intel.com>
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Description: Only set for XDomains. The maximum HopID the other host
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supports as its input HopID.
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What: /sys/bus/thunderbolt/devices/.../rx_speed
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Date: Jan 2020
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KernelVersion: 5.5
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Contact: Mika Westerberg <mika.westerberg@linux.intel.com>
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Description: This attribute reports the device RX speed per lane.
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All RX lanes run at the same speed.
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What: /sys/bus/thunderbolt/devices/.../rx_lanes
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Date: Jan 2020
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KernelVersion: 5.5
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Contact: Mika Westerberg <mika.westerberg@linux.intel.com>
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Description: This attribute reports number of RX lanes the device is
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using simultaneously through its upstream port.
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What: /sys/bus/thunderbolt/devices/.../tx_speed
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Date: Jan 2020
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KernelVersion: 5.5
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Contact: Mika Westerberg <mika.westerberg@linux.intel.com>
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Description: This attribute reports the TX speed per lane.
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All TX lanes run at the same speed.
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What: /sys/bus/thunderbolt/devices/.../tx_lanes
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Date: Jan 2020
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KernelVersion: 5.5
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Contact: Mika Westerberg <mika.westerberg@linux.intel.com>
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Description: This attribute reports number of TX lanes the device is
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using simultaneously through its upstream port.
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What: /sys/bus/thunderbolt/devices/.../vendor
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Date: Sep 2017
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KernelVersion: 4.13
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Contact: thunderbolt-software@lists.01.org
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Description: This attribute contains vendor id of this device extracted
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from the device DROM.
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What: /sys/bus/thunderbolt/devices/.../vendor_name
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Date: Sep 2017
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KernelVersion: 4.13
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Contact: thunderbolt-software@lists.01.org
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Description: This attribute contains vendor name of this device extracted
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from the device DROM.
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What: /sys/bus/thunderbolt/devices/.../unique_id
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Date: Sep 2017
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KernelVersion: 4.13
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Contact: thunderbolt-software@lists.01.org
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Description: This attribute contains unique_id string of this device.
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This is either read from hardware registers (UUID on
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newer hardware) or based on UID from the device DROM.
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Can be used to uniquely identify particular device.
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What: /sys/bus/thunderbolt/devices/.../nvm_version
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Date: Sep 2017
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KernelVersion: 4.13
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Contact: thunderbolt-software@lists.01.org
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Description: If the device has upgradeable firmware the version
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number is available here. Format: %x.%x, major.minor.
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If the device is in safe mode reading the file returns
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-ENODATA instead as the NVM version is not available.
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What: /sys/bus/thunderbolt/devices/.../nvm_authenticate
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Date: Sep 2017
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KernelVersion: 4.13
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Contact: thunderbolt-software@lists.01.org
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Description: When new NVM image is written to the non-active NVM
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area (through non_activeX NVMem device), the
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authentication procedure is started by writing to
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this file.
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If everything goes well, the device is
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restarted with the new NVM firmware. If the image
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verification fails an error code is returned instead.
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This file will accept writing values "1", "2" or "3".
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- Writing "1" will flush the image to the storage
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area and authenticate the image in one action.
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- Writing "2" will run some basic validation on the image
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and flush it to the storage area.
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- Writing "3" will authenticate the image that is
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currently written in the storage area. This is only
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supported with USB4 devices and retimers.
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When read holds status of the last authentication
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operation if an error occurred during the process. This
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is directly the status value from the DMA configuration
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based mailbox before the device is power cycled. Writing
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0 here clears the status.
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What: /sys/bus/thunderbolt/devices/.../nvm_authenticate_on_disconnect
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Date: Oct 2020
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KernelVersion: v5.9
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Contact: Mario Limonciello <mario.limonciello@outlook.com>
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Description: For supported devices, automatically authenticate the new Thunderbolt
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image when the device is disconnected from the host system.
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This file will accept writing values "1" or "2"
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- Writing "1" will flush the image to the storage
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area and prepare the device for authentication on disconnect.
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- Writing "2" will run some basic validation on the image
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and flush it to the storage area.
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What: /sys/bus/thunderbolt/devices/<xdomain>.<service>/key
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Date: Jan 2018
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KernelVersion: 4.15
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Contact: thunderbolt-software@lists.01.org
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Description: This contains name of the property directory the XDomain
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service exposes. This entry describes the protocol in
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question. Following directories are already reserved by
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the Apple XDomain specification:
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======== ===============================================
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network IP/ethernet over Thunderbolt
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targetdm Target disk mode protocol over Thunderbolt
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extdisp External display mode protocol over Thunderbolt
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======== ===============================================
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What: /sys/bus/thunderbolt/devices/<xdomain>.<service>/modalias
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Date: Jan 2018
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KernelVersion: 4.15
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Contact: thunderbolt-software@lists.01.org
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Description: Stores the same MODALIAS value emitted by uevent for
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the XDomain service. Format: tbtsvc:kSpNvNrN
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What: /sys/bus/thunderbolt/devices/<xdomain>.<service>/prtcid
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Date: Jan 2018
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KernelVersion: 4.15
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Contact: thunderbolt-software@lists.01.org
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Description: This contains XDomain protocol identifier the XDomain
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service supports.
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What: /sys/bus/thunderbolt/devices/<xdomain>.<service>/prtcvers
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Date: Jan 2018
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KernelVersion: 4.15
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Contact: thunderbolt-software@lists.01.org
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Description: This contains XDomain protocol version the XDomain
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service supports.
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What: /sys/bus/thunderbolt/devices/<xdomain>.<service>/prtcrevs
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Date: Jan 2018
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KernelVersion: 4.15
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Contact: thunderbolt-software@lists.01.org
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Description: This contains XDomain software version the XDomain
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service supports.
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What: /sys/bus/thunderbolt/devices/<xdomain>.<service>/prtcstns
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Date: Jan 2018
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KernelVersion: 4.15
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Contact: thunderbolt-software@lists.01.org
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Description: This contains XDomain service specific settings as
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bitmask. Format: %x
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What: /sys/bus/thunderbolt/devices/usb4_portX/connector
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Date: April 2022
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Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
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Description:
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Symlink to the USB Type-C connector. This link is only
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created when USB Type-C Connector Class is enabled,
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and only if the system firmware is capable of
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describing the connection between a port and its
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connector.
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What: /sys/bus/thunderbolt/devices/usb4_portX/link
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Date: Sep 2021
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KernelVersion: v5.14
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Contact: Mika Westerberg <mika.westerberg@linux.intel.com>
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Description: Returns the current link mode. Possible values are
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"usb4", "tbt" and "none".
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What: /sys/bus/thunderbolt/devices/usb4_portX/offline
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Date: Sep 2021
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KernelVersion: v5.14
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Contact: Rajmohan Mani <rajmohan.mani@intel.com>
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Description: Writing 1 to this attribute puts the USB4 port into
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offline mode. Only allowed when there is nothing
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connected to the port (link attribute returns "none").
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Once the port is in offline mode it does not receive any
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hotplug events. This is used to update NVM firmware of
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on-board retimers. Writing 0 puts the port back to
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online mode.
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This attribute is only visible if the platform supports
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powering on retimers when there is no cable connected.
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What: /sys/bus/thunderbolt/devices/usb4_portX/rescan
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Date: Sep 2021
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KernelVersion: v5.14
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Contact: Rajmohan Mani <rajmohan.mani@intel.com>
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Description: When the USB4 port is in offline mode writing 1 to this
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attribute forces rescan of the sideband for on-board
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retimers. Each retimer appear under the USB4 port as if
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the USB4 link was up. These retimers act in the same way
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as if the cable was connected so upgrading their NVM
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firmware can be done the usual way.
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What: /sys/bus/thunderbolt/devices/<device>:<port>.<index>/device
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Date: Oct 2020
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KernelVersion: v5.9
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Contact: Mika Westerberg <mika.westerberg@linux.intel.com>
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Description: Retimer device identifier read from the hardware.
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What: /sys/bus/thunderbolt/devices/<device>:<port>.<index>/nvm_authenticate
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Date: Oct 2020
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KernelVersion: v5.9
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Contact: Mika Westerberg <mika.westerberg@linux.intel.com>
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Description: When new NVM image is written to the non-active NVM
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area (through non_activeX NVMem device), the
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authentication procedure is started by writing 1 to
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this file. If everything goes well, the device is
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restarted with the new NVM firmware. If the image
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verification fails an error code is returned instead.
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When read holds status of the last authentication
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operation if an error occurred during the process.
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Format: %x.
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What: /sys/bus/thunderbolt/devices/<device>:<port>.<index>/nvm_version
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Date: Oct 2020
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KernelVersion: v5.9
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Contact: Mika Westerberg <mika.westerberg@linux.intel.com>
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Description: Holds retimer NVM version number. Format: %x.%x, major.minor.
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What: /sys/bus/thunderbolt/devices/<device>:<port>.<index>/vendor
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Date: Oct 2020
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KernelVersion: v5.9
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Contact: Mika Westerberg <mika.westerberg@linux.intel.com>
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Description: Retimer vendor identifier read from the hardware.
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