1 use alloc::{collections::LinkedList, string::String, sync::Arc}; 2 use system_error::SystemError; 3 4 use crate::exception::{irqdesc::IrqReturn, IrqNumber}; 5 6 use super::base::device::{driver::Driver, Device, DeviceId}; 7 8 pub(super) mod irq; 9 pub mod mmio; 10 pub mod sysfs; 11 pub mod transport; 12 pub mod transport_mmio; 13 pub mod transport_pci; 14 #[allow(clippy::module_inception)] 15 pub mod virtio; 16 pub mod virtio_impl; 17 18 /// virtio 设备厂商ID 19 pub const VIRTIO_VENDOR_ID: u16 = 0x1af4; 20 // 参考：https://code.dragonos.org.cn/xref/linux-6.6.21/include/linux/mod_devicetable.h?fi=VIRTIO_DEV_ANY_ID#453 21 pub const VIRTIO_DEV_ANY_ID: u32 = 0xffffffff; 22 23 #[allow(dead_code)] 24 pub trait VirtIODevice: Device { 25 fn handle_irq(&self, _irq: IrqNumber) -> Result<IrqReturn, SystemError>; 26 27 fn dev_id(&self) -> &Arc<DeviceId>; 28 29 fn set_device_name(&self, name: String); 30 31 fn device_name(&self) -> String; 32 33 fn set_virtio_device_index(&self, index: VirtIODeviceIndex); 34 35 fn virtio_device_index(&self) -> Option<VirtIODeviceIndex>; 36 37 /// virtio 设备类型 38 fn device_type_id(&self) -> u32; 39 40 /// virtio 设备厂商 41 fn vendor(&self) -> u32; 42 43 /// virtio设备的中断号 44 fn irq(&self) -> Option<IrqNumber>; 45 46 fn set_irq_number(&self, _irq: IrqNumber) -> Result<(), SystemError> { 47 Err(SystemError::ENOSYS) 48 } 49 } 50 51 pub trait VirtIODriver: Driver { 52 fn probe(&self, device: &Arc<dyn VirtIODevice>) -> Result<(), SystemError>; 53 54 fn virtio_id_table(&self) -> LinkedList<VirtioDeviceId>; 55 56 fn add_virtio_id(&self, id: VirtioDeviceId); 57 } 58 59 int_like!(VirtIODeviceIndex, usize); 60 61 #[derive(Debug, Default)] 62 pub struct VirtIODriverCommonData { 63 pub id_table: LinkedList<VirtioDeviceId>, 64 } 65 66 /// 参考：https://code.dragonos.org.cn/xref/linux-6.6.21/include/linux/mod_devicetable.h#449 67 #[derive(Debug, Default, Clone)] 68 pub struct VirtioDeviceId { 69 pub device: u32, 70 pub vendor: u32, 71 } 72 73 impl VirtioDeviceId { 74 pub fn new(device: u32, vendor: u32) -> Self { 75 Self { device, vendor } 76 } 77 } 78