Trait PciExtendedCapability

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pub trait PciExtendedCapability:
    Send
    + Sync
    + Inspect
    + ProtobufSaveRestore {
    // Required methods
    fn label(&self) -> &str;
    fn extended_capability_id(&self) -> u16;
    fn capability_version(&self) -> u8;
    fn len(&self) -> usize;
    fn read(&self, offset: u16, value: ByteEnabledDwordRead<'_>);
    fn write(&mut self, offset: u16, val: ByteEnabledDwordWrite);
    fn reset(&mut self);
}

Expand description

A generic PCIe extended capability structure.

Required Methods§

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fn label(&self) -> &str

A descriptive label for use in Save/Restore + Inspect output.

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fn extended_capability_id(&self) -> u16

Returns the PCIe extended capability ID for this capability.

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fn capability_version(&self) -> u8

Returns this extended capability structure version.

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fn len(&self) -> usize

Length of the extended capability structure in bytes.

Implementations must satisfy all of the following invariants:

Length must be non-zero.
Length must be 32-bit aligned (a multiple of 4).
When packed into config space by cfg_space_emu starting at 0x100, the cumulative size of all extended capabilities must not exceed 0x1000.

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