1 use super::transport_pci::PciTransport; 2 use super::virtio_impl::HalImpl; 3 use crate::driver::net::virtio_net::virtio_net; 4 use crate::driver::pci::pci::PciDeviceStructureGeneralDevice; 5 use crate::driver::pci::pci::{ 6 get_pci_device_structure_mut, PciDeviceStructure, PCI_DEVICE_LINKEDLIST, 7 }; 8 use crate::libs::rwlock::RwLockWriteGuard; 9 use crate::{kdebug, kerror, kwarn}; 10 use alloc::{boxed::Box, collections::LinkedList}; 11 use virtio_drivers::transport::{DeviceType, Transport}; 12 13 const NETWORK_CLASS: u8 = 0x2; 14 const ETHERNET_SUBCLASS: u8 = 0x0; 15 16 //Virtio设备寻找过程中出现的问题 17 enum VirtioError { 18 VirtioNetNotFound, 19 NetDeviceNotFound, 20 } 21 22 /// @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）（for c） 23 #[no_mangle] 24 pub extern "C" fn rs_virtio_probe() { 25 virtio_probe(); 26 } 27 28 ///@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） 29 pub fn virtio_probe() { 30 let mut list = PCI_DEVICE_LINKEDLIST.write(); 31 if let Ok(virtio_list) = virtio_device_search(&mut list) { 32 for virtio_device in virtio_list { 33 match PciTransport::new::<HalImpl>(virtio_device) { 34 Ok(mut transport) => { 35 kdebug!( 36 "Detected virtio PCI device with device type {:?}, features {:#018x}", 37 transport.device_type(), 38 transport.read_device_features(), 39 ); 40 virtio_device_init(transport); 41 } 42 Err(err) => { 43 kerror!("Pci transport create failed because of error: {}", err); 44 } 45 } 46 } 47 } else { 48 kerror!("Error occured when finding virtio device!"); 49 } 50 } 51 52 ///@brief 为virtio设备寻找对应的驱动进行初始化 53 fn virtio_device_init(transport: impl Transport + 'static) { 54 match transport.device_type() { 55 DeviceType::Block => { 56 kwarn!("Not support virtio_block device for now"); 57 } 58 DeviceType::GPU => { 59 kwarn!("Not support virtio_gpu device for now"); 60 } 61 DeviceType::Input => { 62 kwarn!("Not support virtio_input device for now"); 63 } 64 DeviceType::Network => virtio_net(transport), 65 t => { 66 kwarn!("Unrecognized virtio device: {:?}", t); 67 } 68 } 69 } 70 71 /// @brief 寻找所有的virtio设备 72 /// @param list 链表的写锁 73 /// @return Result<LinkedList<&'a mut Pci_Device_Structure_General_Device>, VirtioError> 成功则返回包含所有virtio设备结构体的可变引用的链表，失败则返回err 74 /// 该函数主要是为其他virtio设备预留支持 75 fn virtio_device_search<'a>( 76 list: &'a mut RwLockWriteGuard<'_, LinkedList<Box<dyn PciDeviceStructure>>>, 77 ) -> Result<LinkedList<&'a mut PciDeviceStructureGeneralDevice>, VirtioError> { 78 let mut virtio_list: LinkedList<&mut PciDeviceStructureGeneralDevice> = LinkedList::new(); 79 let virtio_net_device = get_virtio_net_device(list)?; 80 virtio_list.push_back(virtio_net_device); 81 Ok(virtio_list) 82 } 83 84 /// @brief 寻找virtio-net设备 85 /// @param list 链表的写锁 86 /// @return Result<&'a mut Pci_Device_Structure_General_Device, VirtioError> 成功则返回virtio设备结构体的可变引用，失败则返回err 87 fn get_virtio_net_device<'a>( 88 list: &'a mut RwLockWriteGuard<'_, LinkedList<Box<dyn PciDeviceStructure>>>, 89 ) -> Result<&'a mut PciDeviceStructureGeneralDevice, VirtioError> { 90 let result = get_pci_device_structure_mut(list, NETWORK_CLASS, ETHERNET_SUBCLASS); 91 if result.is_empty() { 92 return Err(VirtioError::NetDeviceNotFound); 93 } 94 for device in result { 95 let standard_device = device.as_standard_device_mut().unwrap(); 96 let header = &standard_device.common_header; 97 if header.vendor_id == 0x1AF4 98 && header.device_id >= 0x1000 99 && header.device_id <= 0x103F 100 && standard_device.subsystem_id == 1 101 { 102 return Ok(standard_device); 103 } 104 } 105 Err(VirtioError::VirtioNetNotFound) 106 } 107