Struct abyss::dev::pci::virtio::virt_queue::VirtqDesc

#[repr(C, align(16))]
pub struct VirtqDesc {
    pub addr: Pa,
    pub len: u32,
    pub flags: VirtqDescFlags,
    /* private fields */
}

The Virtqueue Descriptor Table.

The descriptor table refers to the buffers the driver is using for the device. addr is a physical address, and the buffers can be chained via next. Each descriptor describes a buffer which is read-only for the device (“device-readable”) or write-only for the device (“device-writable”), but a chain of descriptors can contain both device-readable and device-writable buffers. The actual contents of the memory offered to the device depends on the device type. Most common is to begin the data with a header (containing little-endian fields) for the device to read, and postfix it with a status tailer for the device to write.

Fields

addr: Pa

Address (guest-physical)

len: u32

Length.

flags: VirtqDescFlags

The flags.

Trait Implementations

impl Debug for VirtqDesc

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.