1 use super::mmio::virtio_probe_mmio;
2 use super::transport_pci::PciTransport;
3 use super::virtio_impl::HalImpl;
4 use crate::driver::base::device::bus::Bus;
5 use crate::driver::base::device::{Device, DeviceId};
6 use crate::driver::block::virtio_blk::virtio_blk;
7 use crate::driver::net::virtio_net::virtio_net;
8 use crate::driver::pci::pci::{
9 get_pci_device_structures_mut_by_vendor_id, PciDeviceStructure,
10 PciDeviceStructureGeneralDevice, PCI_DEVICE_LINKEDLIST,
11 };
12 use crate::driver::pci::subsys::pci_bus;
13 use crate::driver::virtio::transport::VirtIOTransport;
14 use crate::libs::rwlock::RwLockWriteGuard;
15
16 use alloc::string::String;
17 use alloc::sync::Arc;
18 use alloc::vec::Vec;
19 use alloc::{boxed::Box, collections::LinkedList};
20 use log::{debug, error, warn};
21 use virtio_drivers::transport::{DeviceType, Transport};
22
23 ///@brief 寻找并加载所有virtio设备的驱动（目前只有virtio-net，但其他virtio设备也可添加）
virtio_probe()24 pub fn virtio_probe() {
25 #[cfg(not(target_arch = "riscv64"))]
26 virtio_probe_pci();
27 virtio_probe_mmio();
28 }
29
30 #[allow(dead_code)]
virtio_probe_pci()31 fn virtio_probe_pci() {
32 let mut list = PCI_DEVICE_LINKEDLIST.write();
33 let virtio_list = virtio_device_search(&mut list);
34 for virtio_device in virtio_list {
35 let dev_id = virtio_device.common_header.device_id;
36 let dev_id = DeviceId::new(None, Some(format!("{dev_id}"))).unwrap();
37 match PciTransport::new::<HalImpl>(virtio_device, dev_id.clone()) {
38 Ok(mut transport) => {
39 debug!(
40 "Detected virtio PCI device with device type {:?}, features {:#018x}",
41 transport.device_type(),
42 transport.read_device_features(),
43 );
44 let transport = VirtIOTransport::Pci(transport);
45 // 这里暂时通过设备名称在sysfs中查找设备，但是我感觉用设备ID更好
46 let bus = pci_bus() as Arc<dyn Bus>;
47 let name: String = virtio_device.common_header.bus_device_function.into();
48 let pci_raw_device = bus.find_device_by_name(name.as_str());
49 virtio_device_init(transport, dev_id, pci_raw_device);
50 }
51 Err(err) => {
52 error!("Pci transport create failed because of error: {}", err);
53 }
54 }
55 }
56 }
57
58 ///@brief 为virtio设备寻找对应的驱动进行初始化
virtio_device_init( transport: VirtIOTransport, dev_id: Arc<DeviceId>, dev_parent: Option<Arc<dyn Device>>, )59 pub(super) fn virtio_device_init(
60 transport: VirtIOTransport,
61 dev_id: Arc<DeviceId>,
62 dev_parent: Option<Arc<dyn Device>>,
63 ) {
64 match transport.device_type() {
65 DeviceType::Block => virtio_blk(transport, dev_id, dev_parent),
66 DeviceType::GPU => {
67 warn!("Not support virtio_gpu device for now");
68 }
69 DeviceType::Input => {
70 warn!("Not support virtio_input device for now");
71 }
72 DeviceType::Network => virtio_net(transport, dev_id, dev_parent),
73 t => {
74 warn!("Unrecognized virtio device: {:?}", t);
75 }
76 }
77 }
78
79 /// # virtio_device_search - 在给定的PCI设备列表中搜索符合特定标准的virtio设备
80 ///
81 /// 该函数搜索一个PCI设备列表，找到所有由特定厂商ID（0x1AF4）和设备ID范围（0x1000至0x103F）定义的virtio设备。
82 ///
83 /// ## 参数
84 ///
85 /// - list: &'a mut RwLockWriteGuard<'_, LinkedList<Box<dyn PciDeviceStructure>>> - 一个可写的PCI设备结构列表的互斥锁。
86 ///
87 /// ## 返回值
88 ///
89 /// 返回一个包含所有找到的virtio设备的数组
virtio_device_search<'a>( list: &'a mut RwLockWriteGuard<'_, LinkedList<Box<dyn PciDeviceStructure>>>, ) -> Vec<&'a mut PciDeviceStructureGeneralDevice>90 fn virtio_device_search<'a>(
91 list: &'a mut RwLockWriteGuard<'_, LinkedList<Box<dyn PciDeviceStructure>>>,
92 ) -> Vec<&'a mut PciDeviceStructureGeneralDevice> {
93 let mut virtio_list = Vec::new();
94 let result = get_pci_device_structures_mut_by_vendor_id(list, 0x1AF4);
95
96 for device in result {
97 let standard_device = device.as_standard_device_mut().unwrap();
98 let header = &standard_device.common_header;
99 if header.device_id >= 0x1000 && header.device_id <= 0x103F {
100 virtio_list.push(standard_device);
101 }
102 }
103
104 return virtio_list;
105 }
106