2023-08-30 17:31:07 +02:00
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What: /sys/bus/dsa/devices/dsa<m>/version
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Date: Apr 15, 2020
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KernelVersion: 5.8.0
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Contact: dmaengine@vger.kernel.org
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Description: The hardware version number.
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What: /sys/bus/dsa/devices/dsa<m>/cdev_major
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The major number that the character device driver assigned to
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this device.
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What: /sys/bus/dsa/devices/dsa<m>/errors
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The error information for this device.
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What: /sys/bus/dsa/devices/dsa<m>/max_batch_size
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The largest number of work descriptors in a batch.
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It's not visible when the device does not support batch.
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What: /sys/bus/dsa/devices/dsa<m>/max_work_queues_size
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The maximum work queue size supported by this device.
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What: /sys/bus/dsa/devices/dsa<m>/max_engines
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The maximum number of engines supported by this device.
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What: /sys/bus/dsa/devices/dsa<m>/max_groups
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The maximum number of groups can be created under this device.
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What: /sys/bus/dsa/devices/dsa<m>/max_read_buffers
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Date: Dec 10, 2021
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KernelVersion: 5.17.0
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Contact: dmaengine@vger.kernel.org
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Description: The total number of read buffers supported by this device.
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The read buffers represent resources within the DSA
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implementation, and these resources are allocated by engines to
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support operations. See DSA spec v1.2 9.2.4 Total Read Buffers.
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It's not visible when the device does not support Read Buffer
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allocation control.
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What: /sys/bus/dsa/devices/dsa<m>/max_transfer_size
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The number of bytes to be read from the source address to
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perform the operation. The maximum transfer size is dependent on
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the workqueue the descriptor was submitted to.
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What: /sys/bus/dsa/devices/dsa<m>/max_work_queues
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The maximum work queue number that this device supports.
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What: /sys/bus/dsa/devices/dsa<m>/numa_node
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The numa node number for this device.
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What: /sys/bus/dsa/devices/dsa<m>/op_cap
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The operation capability bit mask specify the operation types
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supported by the this device.
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What: /sys/bus/dsa/devices/dsa<m>/pasid_enabled
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Date: Oct 27, 2020
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KernelVersion: 5.11.0
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Contact: dmaengine@vger.kernel.org
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Description: To indicate if PASID (process address space identifier) is
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enabled or not for this device.
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What: /sys/bus/dsa/devices/dsa<m>/state
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The state information of this device. It can be either enabled
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or disabled.
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What: /sys/bus/dsa/devices/dsa<m>/group<m>.<n>
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The assigned group under this device.
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What: /sys/bus/dsa/devices/dsa<m>/engine<m>.<n>
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The assigned engine under this device.
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What: /sys/bus/dsa/devices/dsa<m>/wq<m>.<n>
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The assigned work queue under this device.
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What: /sys/bus/dsa/devices/dsa<m>/configurable
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: To indicate if this device is configurable or not.
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What: /sys/bus/dsa/devices/dsa<m>/read_buffer_limit
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Date: Dec 10, 2021
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KernelVersion: 5.17.0
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Contact: dmaengine@vger.kernel.org
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Description: The maximum number of read buffers that may be in use at
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one time by operations that access low bandwidth memory in the
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device. See DSA spec v1.2 9.2.8 GENCFG on Global Read Buffer Limit.
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It's not visible when the device does not support Read Buffer
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allocation control.
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What: /sys/bus/dsa/devices/dsa<m>/cmd_status
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Date: Aug 28, 2020
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KernelVersion: 5.10.0
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Contact: dmaengine@vger.kernel.org
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Description: The last executed device administrative command's status/error.
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Also last configuration error overloaded.
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Writing to it will clear the status.
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2023-10-24 12:59:35 +02:00
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What: /sys/bus/dsa/devices/dsa<m>/iaa_cap
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Date: Sept 14, 2022
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KernelVersion: 6.0.0
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Contact: dmaengine@vger.kernel.org
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Description: IAA (IAX) capability mask. Exported to user space for application
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consumption. This attribute should only be visible on IAA devices
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that are version 2 or later.
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What: /sys/bus/dsa/devices/dsa<m>/event_log_size
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Date: Sept 14, 2022
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KernelVersion: 6.4.0
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Contact: dmaengine@vger.kernel.org
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Description: The event log size to be configured. Default is 64 entries and
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occupies 4k size if the evl entry is 64 bytes. It's visible
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only on platforms that support the capability.
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2023-08-30 17:31:07 +02:00
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What: /sys/bus/dsa/devices/wq<m>.<n>/block_on_fault
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Date: Oct 27, 2020
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KernelVersion: 5.11.0
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Contact: dmaengine@vger.kernel.org
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Description: To indicate block on fault is allowed or not for the work queue
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to support on demand paging.
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What: /sys/bus/dsa/devices/wq<m>.<n>/group_id
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The group id that this work queue belongs to.
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What: /sys/bus/dsa/devices/wq<m>.<n>/size
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The work queue size for this work queue.
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What: /sys/bus/dsa/devices/wq<m>.<n>/type
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The type of this work queue, it can be "kernel" type for work
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queue usages in the kernel space or "user" type for work queue
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usages by applications in user space.
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What: /sys/bus/dsa/devices/wq<m>.<n>/cdev_minor
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The minor number assigned to this work queue by the character
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device driver.
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What: /sys/bus/dsa/devices/wq<m>.<n>/mode
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The work queue mode type for this work queue.
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What: /sys/bus/dsa/devices/wq<m>.<n>/priority
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The priority value of this work queue, it is a value relative to
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other work queue in the same group to control quality of service
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for dispatching work from multiple workqueues in the same group.
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What: /sys/bus/dsa/devices/wq<m>.<n>/state
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The current state of the work queue.
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What: /sys/bus/dsa/devices/wq<m>.<n>/threshold
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The number of entries in this work queue that may be filled
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via a limited portal.
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What: /sys/bus/dsa/devices/wq<m>.<n>/max_transfer_size
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Date: Aug 28, 2020
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KernelVersion: 5.10.0
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Contact: dmaengine@vger.kernel.org
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Description: The max transfer sized for this workqueue. Cannot exceed device
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max transfer size. Configurable parameter.
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What: /sys/bus/dsa/devices/wq<m>.<n>/max_batch_size
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Date: Aug 28, 2020
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KernelVersion: 5.10.0
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Contact: dmaengine@vger.kernel.org
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Description: The max batch size for this workqueue. Cannot exceed device
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max batch size. Configurable parameter.
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It's not visible when the device does not support batch.
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What: /sys/bus/dsa/devices/wq<m>.<n>/ats_disable
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Date: Nov 13, 2020
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KernelVersion: 5.11.0
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Contact: dmaengine@vger.kernel.org
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Description: Indicate whether ATS disable is turned on for the workqueue.
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0 indicates ATS is on, and 1 indicates ATS is off for the workqueue.
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2023-10-24 12:59:35 +02:00
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What: /sys/bus/dsa/devices/wq<m>.<n>/prs_disable
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Date: Sept 14, 2022
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KernelVersion: 6.4.0
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Contact: dmaengine@vger.kernel.org
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Description: Controls whether PRS disable is turned on for the workqueue.
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0 indicates PRS is on, and 1 indicates PRS is off for the
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workqueue. This option overrides block_on_fault attribute
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if set. It's visible only on platforms that support the
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capability.
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2023-08-30 17:31:07 +02:00
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What: /sys/bus/dsa/devices/wq<m>.<n>/occupancy
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Date May 25, 2021
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KernelVersion: 5.14.0
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Contact: dmaengine@vger.kernel.org
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Description: Show the current number of entries in this WQ if WQ Occupancy
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Support bit WQ capabilities is 1.
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What: /sys/bus/dsa/devices/wq<m>.<n>/enqcmds_retries
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Date Oct 29, 2021
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KernelVersion: 5.17.0
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Contact: dmaengine@vger.kernel.org
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Description: Indicate the number of retires for an enqcmds submission on a sharedwq.
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A max value to set attribute is capped at 64.
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What: /sys/bus/dsa/devices/wq<m>.<n>/op_config
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Date: Sept 14, 2022
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KernelVersion: 6.0.0
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Contact: dmaengine@vger.kernel.org
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Description: Shows the operation capability bits displayed in bitmap format
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presented by %*pb printk() output format specifier.
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The attribute can be configured when the WQ is disabled in
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order to configure the WQ to accept specific bits that
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correlates to the operations allowed. It's visible only
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on platforms that support the capability.
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What: /sys/bus/dsa/devices/engine<m>.<n>/group_id
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Date: Oct 25, 2019
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KernelVersion: 5.6.0
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Contact: dmaengine@vger.kernel.org
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Description: The group that this engine belongs to.
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What: /sys/bus/dsa/devices/group<m>.<n>/use_read_buffer_limit
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Date: Dec 10, 2021
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KernelVersion: 5.17.0
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Contact: dmaengine@vger.kernel.org
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Description: Enable the use of global read buffer limit for the group. See DSA
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spec v1.2 9.2.18 GRPCFG Use Global Read Buffer Limit.
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It's not visible when the device does not support Read Buffer
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allocation control.
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What: /sys/bus/dsa/devices/group<m>.<n>/read_buffers_allowed
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Date: Dec 10, 2021
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KernelVersion: 5.17.0
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Contact: dmaengine@vger.kernel.org
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Description: Indicates max number of read buffers that may be in use at one time
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by all engines in the group. See DSA spec v1.2 9.2.18 GRPCFG Read
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Buffers Allowed.
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It's not visible when the device does not support Read Buffer
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allocation control.
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What: /sys/bus/dsa/devices/group<m>.<n>/read_buffers_reserved
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Date: Dec 10, 2021
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KernelVersion: 5.17.0
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Contact: dmaengine@vger.kernel.org
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Description: Indicates the number of Read Buffers reserved for the use of
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engines in the group. See DSA spec v1.2 9.2.18 GRPCFG Read Buffers
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Reserved.
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It's not visible when the device does not support Read Buffer
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allocation control.
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What: /sys/bus/dsa/devices/group<m>.<n>/desc_progress_limit
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Date: Sept 14, 2022
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KernelVersion: 6.0.0
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Contact: dmaengine@vger.kernel.org
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Description: Allows control of the number of work descriptors that can be
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concurrently processed by an engine in the group as a fraction
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of the Maximum Work Descriptors in Progress value specified in
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the ENGCAP register. The acceptable values are 0 (default),
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1 (1/2 of max value), 2 (1/4 of the max value), and 3 (1/8 of
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the max value). It's visible only on platforms that support
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the capability.
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What: /sys/bus/dsa/devices/group<m>.<n>/batch_progress_limit
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Date: Sept 14, 2022
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KernelVersion: 6.0.0
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Contact: dmaengine@vger.kernel.org
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Description: Allows control of the number of batch descriptors that can be
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concurrently processed by an engine in the group as a fraction
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of the Maximum Batch Descriptors in Progress value specified in
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the ENGCAP register. The acceptable values are 0 (default),
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1 (1/2 of max value), 2 (1/4 of the max value), and 3 (1/8 of
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the max value). It's visible only on platforms that support
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the capability.
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2023-10-24 12:59:35 +02:00
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What: /sys/bus/dsa/devices/wq<m>.<n>/dsa<x>\!wq<m>.<n>/file<y>/cr_faults
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Date: Sept 14, 2022
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KernelVersion: 6.4.0
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Contact: dmaengine@vger.kernel.org
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Description: Show the number of Completion Record (CR) faults this application
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has caused.
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What: /sys/bus/dsa/devices/wq<m>.<n>/dsa<x>\!wq<m>.<n>/file<y>/cr_fault_failures
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Date: Sept 14, 2022
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KernelVersion: 6.4.0
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Contact: dmaengine@vger.kernel.org
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Description: Show the number of Completion Record (CR) faults failures that this
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application has caused. The failure counter is incremented when the
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driver cannot fault in the address for the CR. Typically this is caused
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by a bad address programmed in the submitted descriptor or a malicious
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submitter is using bad CR address on purpose.
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What: /sys/bus/dsa/devices/wq<m>.<n>/dsa<x>\!wq<m>.<n>/file<y>/pid
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Date: Sept 14, 2022
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KernelVersion: 6.4.0
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Contact: dmaengine@vger.kernel.org
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Description: Show the process id of the application that opened the file. This is
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helpful information for a monitor daemon that wants to kill the
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application that opened the file.
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