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::DeviceId; 5 use crate::driver::net::virtio_net::virtio_net; 6 use crate::driver::pci::pci::{ 7 get_pci_device_structures_mut_by_vendor_id, PciDeviceStructure, 8 PciDeviceStructureGeneralDevice, PCI_DEVICE_LINKEDLIST, 9 }; 10 use crate::driver::virtio::transport::VirtIOTransport; 11 use crate::libs::rwlock::RwLockWriteGuard; 12 use crate::{kdebug, kerror, kwarn}; 13 use alloc::sync::Arc; 14 use alloc::vec::Vec; 15 use alloc::{boxed::Box, collections::LinkedList}; 16 use virtio_drivers::transport::{DeviceType, Transport}; 17 18 ///@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） 19 pub fn virtio_probe() { 20 virtio_probe_pci(); 21 virtio_probe_mmio(); 22 } 23 24 fn virtio_probe_pci() { 25 let mut list = PCI_DEVICE_LINKEDLIST.write(); 26 let virtio_list = virtio_device_search(&mut list); 27 for virtio_device in virtio_list { 28 let dev_id = virtio_device.common_header.device_id; 29 let dev_id = DeviceId::new(None, Some(format!("{dev_id}"))).unwrap(); 30 match PciTransport::new::<HalImpl>(virtio_device, dev_id.clone()) { 31 Ok(mut transport) => { 32 kdebug!( 33 "Detected virtio PCI device with device type {:?}, features {:#018x}", 34 transport.device_type(), 35 transport.read_device_features(), 36 ); 37 let transport = VirtIOTransport::Pci(transport); 38 virtio_device_init(transport, dev_id); 39 } 40 Err(err) => { 41 kerror!("Pci transport create failed because of error: {}", err); 42 } 43 } 44 } 45 } 46 47 ///@brief 为virtio设备寻找对应的驱动进行初始化 48 fn virtio_device_init(transport: VirtIOTransport, dev_id: Arc<DeviceId>) { 49 match transport.device_type() { 50 DeviceType::Block => { 51 kwarn!("Not support virtio_block device for now"); 52 } 53 DeviceType::GPU => { 54 kwarn!("Not support virtio_gpu device for now"); 55 } 56 DeviceType::Input => { 57 kwarn!("Not support virtio_input device for now"); 58 } 59 DeviceType::Network => virtio_net(transport, dev_id), 60 t => { 61 kwarn!("Unrecognized virtio device: {:?}", t); 62 } 63 } 64 } 65 66 /// # 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 67 /// 68 /// 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。 69 /// 70 /// ## 参数 71 /// 72 /// - list: &'a mut RwLockWriteGuard<'_, LinkedList<Box<dyn PciDeviceStructure>>> - 一个可写的PCI设备结构列表的互斥锁。 73 /// 74 /// ## 返回值 75 /// 76 /// 返回一个包含所有找到的virtio设备的数组 77 fn virtio_device_search<'a>( 78 list: &'a mut RwLockWriteGuard<'_, LinkedList<Box<dyn PciDeviceStructure>>>, 79 ) -> Vec<&'a mut PciDeviceStructureGeneralDevice> { 80 let mut virtio_list = Vec::new(); 81 let result = get_pci_device_structures_mut_by_vendor_id(list, 0x1AF4); 82 83 for device in result { 84 let standard_device = device.as_standard_device_mut().unwrap(); 85 let header = &standard_device.common_header; 86 if header.device_id >= 0x1000 && header.device_id <= 0x103F { 87 virtio_list.push(standard_device); 88 } 89 } 90 91 return virtio_list; 92 } 93