xref: /linux/Documentation/ABI/stable/sysfs-driver-dma-idxd (revision d7aad5550eca50370e3a1471b46281d03af0699e)

What:		/sys/bus/dsa/devices/dsa<m>/version
Date:		Apr 15, 2020
KernelVersion:	5.8.0
Contact:	dmaengine@vger.kernel.org
Description:	The hardware version number.

What:           /sys/bus/dsa/devices/dsa<m>/cdev_major
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:	The major number that the character device driver assigned to
		this device.

What:           /sys/bus/dsa/devices/dsa<m>/errors
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The error information for this device.

What:           /sys/bus/dsa/devices/dsa<m>/max_batch_size
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The largest number of work descriptors in a batch.

What:           /sys/bus/dsa/devices/dsa<m>/max_work_queues_size
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The maximum work queue size supported by this device.

What:           /sys/bus/dsa/devices/dsa<m>/max_engines
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The maximum number of engines supported by this device.

What:           /sys/bus/dsa/devices/dsa<m>/max_groups
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The maximum number of groups can be created under this device.

What:           /sys/bus/dsa/devices/dsa<m>/max_tokens
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The total number of bandwidth tokens supported by this device.
		The bandwidth tokens represent resources within the DSA
		implementation, and these resources are allocated by engines to
		support operations.

What:           /sys/bus/dsa/devices/dsa<m>/max_transfer_size
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The number of bytes to be read from the source address to
		perform the operation. The maximum transfer size is dependent on
		the workqueue the descriptor was submitted to.

What:           /sys/bus/dsa/devices/dsa<m>/max_work_queues
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The maximum work queue number that this device supports.

What:           /sys/bus/dsa/devices/dsa<m>/numa_node
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The numa node number for this device.

What:           /sys/bus/dsa/devices/dsa<m>/op_cap
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The operation capability bit mask specify the operation types
		supported by the this device.

What:           /sys/bus/dsa/devices/dsa<m>/state
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The state information of this device. It can be either enabled
		or disabled.

What:           /sys/bus/dsa/devices/dsa<m>/group<m>.<n>
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The assigned group under this device.

What:           /sys/bus/dsa/devices/dsa<m>/engine<m>.<n>
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The assigned engine under this device.

What:           /sys/bus/dsa/devices/dsa<m>/wq<m>.<n>
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The assigned work queue under this device.

What:           /sys/bus/dsa/devices/dsa<m>/configurable
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    To indicate if this device is configurable or not.

What:           /sys/bus/dsa/devices/dsa<m>/token_limit
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The maximum number of bandwidth tokens that may be in use at
		one time by operations that access low bandwidth memory in the
		device.

What:           /sys/bus/dsa/devices/wq<m>.<n>/group_id
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The group id that this work queue belongs to.

What:           /sys/bus/dsa/devices/wq<m>.<n>/size
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The work queue size for this work queue.

What:           /sys/bus/dsa/devices/wq<m>.<n>/type
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The type of this work queue, it can be "kernel" type for work
		queue usages in the kernel space or "user" type for work queue
		usages by applications in user space.

What:           /sys/bus/dsa/devices/wq<m>.<n>/cdev_minor
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The minor number assigned to this work queue by the character
		device driver.

What:           /sys/bus/dsa/devices/wq<m>.<n>/mode
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The work queue mode type for this work queue.

What:           /sys/bus/dsa/devices/wq<m>.<n>/priority
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The priority value of this work queue, it is a vlue relative to
		other work queue in the same group to control quality of service
		for dispatching work from multiple workqueues in the same group.

What:           /sys/bus/dsa/devices/wq<m>.<n>/state
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The current state of the work queue.

What:           /sys/bus/dsa/devices/wq<m>.<n>/threshold
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The number of entries in this work queue that may be filled
		via a limited portal.

What:		/sys/bus/dsa/devices/wq<m>.<n>/max_transfer_size
Date:		Aug 28, 2020
KernelVersion:	5.10.0
Contact:	dmaengine@vger.kernel.org
Description:	The max transfer sized for this workqueue. Cannot exceed device
		max transfer size. Configurable parameter.

What:           /sys/bus/dsa/devices/engine<m>.<n>/group_id
Date:           Oct 25, 2019
KernelVersion:  5.6.0
Contact:        dmaengine@vger.kernel.org
Description:    The group that this engine belongs to.