Module virtio_device::queue

Virtqueue management wrappers.

This is a slightly opinionated wrapper that presents the underlying Device and Driver rings as a single ‘virtqueue’ where descriptor chains can be retrieved, walked or iterated, and then returned.

The primary opinionated decision taken by this wrapper is that a descriptor chain is considered a formal object that can automatically returns itself to the queue when dropped. This return is then required to have a mechanism to potentially signal the guest driver, via the DriverNotify trait.

Structs

• Desc
  Reference to descriptor data.
• DescChain
  Represents a chain of descriptors in the available ring.
• DescChainIter
  Iterates over a DescChain.
• Queue
  Representation of a virtqueue.
• QueueMemory
  Describes the memory ranges for a queue.

Enums

• DescError
  Errors that occur when walking descriptor chains via DescChainIter.
• DescType
  Descriptor type

Traits

• DriverNotify
  Informs device that driver needs a notification.