What: /sys/.../<device>/mdev_supported_types/ Date: October 2016 Contact: Kirti Wankhede <kwankhede@nvidia.com> Description: This directory contains list of directories of currently supported mediated device types and their details for <device>. Supported type attributes are defined by the vendor driver who registers with Mediated device framework. Each supported type is a directory whose name is created by adding the device driver string as a prefix to the string provided by the vendor driver. What: /sys/.../<device>/mdev_supported_types/<type-id>/ Date: October 2016 Contact: Kirti Wankhede <kwankhede@nvidia.com> Description: This directory gives details of supported type, like name, description, available_instances, device_api etc. 'device_api' and 'available_instances' are mandatory attributes to be provided by vendor driver. 'name', 'description' and other vendor driver specific attributes are optional. What: /sys/.../mdev_supported_types/<type-id>/create Date: October 2016 Contact: Kirti Wankhede <kwankhede@nvidia.com> Description: Writing UUID to this file will create mediated device of type <type-id> for parent device <device>. This is a write-only file. For example: # echo "83b8f4f2-509f-382f-3c1e-e6bfe0fa1001" > \ /sys/devices/foo/mdev_supported_types/foo-1/create What: /sys/.../mdev_supported_types/<type-id>/devices/ Date: October 2016 Contact: Kirti Wankhede <kwankhede@nvidia.com> Description: This directory contains symbolic links pointing to mdev devices sysfs entries which are created of this <type-id>. What: /sys/.../mdev_supported_types/<type-id>/available_instances Date: October 2016 Contact: Kirti Wankhede <kwankhede@nvidia.com> Description: Reading this attribute will show the number of mediated devices of type <type-id> that can be created. This is a readonly file. Users: Userspace applications interested in creating mediated device of that type. Userspace application should check the number of available instances could be created before creating mediated device of this type. What: /sys/.../mdev_supported_types/<type-id>/device_api Date: October 2016 Contact: Kirti Wankhede <kwankhede@nvidia.com> Description: Reading this attribute will show VFIO device API supported by this type. For example, "vfio-pci" for a PCI device, "vfio-platform" for platform device. What: /sys/.../mdev_supported_types/<type-id>/name Date: October 2016 Contact: Kirti Wankhede <kwankhede@nvidia.com> Description: Reading this attribute will show human readable name of the mediated device that will get created of type <type-id>. This is optional attribute. For example: "Grid M60-0Q" Users: Userspace applications interested in knowing the name of a particular <type-id> that can help in understanding the type of mediated device. What: /sys/.../mdev_supported_types/<type-id>/description Date: October 2016 Contact: Kirti Wankhede <kwankhede@nvidia.com> Description: Reading this attribute will show description of the type of mediated device that will get created of type <type-id>. This is optional attribute. For example: "2 heads, 512M FB, 2560x1600 maximum resolution" Users: Userspace applications interested in knowing the details of a particular <type-id> that can help in understanding the features provided by that type of mediated device. What: /sys/.../<device>/<UUID>/ Date: October 2016 Contact: Kirti Wankhede <kwankhede@nvidia.com> Description: This directory represents device directory of mediated device. It contains all the attributes related to mediated device. What: /sys/.../<device>/<UUID>/mdev_type Date: October 2016 Contact: Kirti Wankhede <kwankhede@nvidia.com> Description: This is symbolic link pointing to supported type, <type-id> directory of which this mediated device is created. What: /sys/.../<device>/<UUID>/remove Date: October 2016 Contact: Kirti Wankhede <kwankhede@nvidia.com> Description: Writing '1' to this file destroys the mediated device. The vendor driver can fail the remove() callback if that device is active and the vendor driver doesn't support hot unplug. Example: # echo 1 > /sys/bus/mdev/devices/<UUID>/remove