Function devices::pci::pci_device::find_bar_and_offset

fn find_bar_and_offset(
    device: &impl PciDevice,
    address: u64,
    size: usize
) -> Option<(PciBarIndex, u64)>

Find the BAR containing an access specified by address and size.

If found, returns the BAR index and offset in bytes within that BAR corresponding to address.

The BAR must fully contain the access region; partial overlaps will return None. Zero-sized accesses should not normally happen, but in case one does, this function will return None.

This function only finds memory BARs, not I/O BARs. If a device with a BAR in I/O address space is ever added, address space information will need to be added to BusDevice::read() and BusDevice::write() and passed along to this function.