| 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 |