diff options
| -rw-r--r-- | devices/src/virtio/virtio_pci_device.rs | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/devices/src/virtio/virtio_pci_device.rs b/devices/src/virtio/virtio_pci_device.rs index 91e139b..dbfaa69 100644 --- a/devices/src/virtio/virtio_pci_device.rs +++ b/devices/src/virtio/virtio_pci_device.rs @@ -30,6 +30,7 @@ pub enum PciCapabilityType { IsrConfig = 3, DeviceConfig = 4, PciConfig = 5, + SharedMemoryConfig = 8, } #[allow(dead_code)] @@ -118,6 +119,61 @@ impl VirtioPciNotifyCap { } } +#[repr(C)] +#[derive(Clone, Copy)] +pub struct VirtioPciShmCap { + cap: VirtioPciCap, + offset_hi: Le32, // Most sig 32 bits of offset + length_hi: Le32, // Most sig 32 bits of length + id: VirtioPciShmCapID, // To distinguish shm chunks +} +// It is safe to implement DataInit; all members are simple numbers and any value is valid. +unsafe impl DataInit for VirtioPciShmCap {} + +#[repr(u8)] +#[derive(Clone, Copy)] +pub enum VirtioPciShmCapID { + Cache = 0, + Vertab = 1, + Journal = 2, +} + +impl PciCapability for VirtioPciShmCap { + fn bytes(&self) -> &[u8] { + self.as_slice() + } + + fn id(&self) -> PciCapabilityID { + PciCapabilityID::VendorSpecific + } +} + +impl VirtioPciShmCap { + pub fn new( + cfg_type: PciCapabilityType, + bar: u8, + offset: u64, + length: u64, + id: VirtioPciShmCapID, + ) -> Self { + VirtioPciShmCap { + cap: VirtioPciCap { + _cap_vndr: 0, + _cap_next: 0, + cap_len: std::mem::size_of::<VirtioPciShmCap>() as u8, + cfg_type: cfg_type as u8, + bar, + padding: [0; 3], + offset: Le32::from(offset as u32), + length: Le32::from(length as u32), + }, + offset_hi: Le32::from((offset >> 32) as u32), + length_hi: Le32::from((length >> 32) as u32), + id, + } + } +} + /// Subclasses for virtio. #[allow(dead_code)] #[derive(Copy, Clone)] |