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::block::virtio_blk::virtio_blk; 6 use crate::driver::net::virtio_net::virtio_net; 7 use crate::driver::pci::pci::{ 8 get_pci_device_structures_mut_by_vendor_id, PciDeviceStructure, 9 PciDeviceStructureGeneralDevice, PCI_DEVICE_LINKEDLIST, 10 }; 11 use crate::driver::virtio::transport::VirtIOTransport; 12 use crate::libs::rwlock::RwLockWriteGuard; 13 14 use alloc::sync::Arc; 15 use alloc::vec::Vec; 16 use alloc::{boxed::Box, collections::LinkedList}; 17 use log::{debug, error, warn}; 18 use virtio_drivers::transport::{DeviceType, Transport}; 19 20 ///@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） 21 pub fn virtio_probe() { 22 #[cfg(not(target_arch = "riscv64"))] 23 virtio_probe_pci(); 24 virtio_probe_mmio(); 25 } 26 27 #[allow(dead_code)] 28 fn virtio_probe_pci() { 29 let mut list = PCI_DEVICE_LINKEDLIST.write(); 30 let virtio_list = virtio_device_search(&mut list); 31 for virtio_device in virtio_list { 32 let dev_id = virtio_device.common_header.device_id; 33 let dev_id = DeviceId::new(None, Some(format!("{dev_id}"))).unwrap(); 34 match PciTransport::new::<HalImpl>(virtio_device, dev_id.clone()) { 35 Ok(mut transport) => { 36 debug!( 37 "Detected virtio PCI device with device type {:?}, features {:#018x}", 38 transport.device_type(), 39 transport.read_device_features(), 40 ); 41 let transport = VirtIOTransport::Pci(transport); 42 virtio_device_init(transport, dev_id); 43 } 44 Err(err) => { 45 error!("Pci transport create failed because of error: {}", err); 46 } 47 } 48 } 49 } 50 51 ///@brief 为virtio设备寻找对应的驱动进行初始化 52 pub(super) fn virtio_device_init(transport: VirtIOTransport, dev_id: Arc<DeviceId>) { 53 match transport.device_type() { 54 DeviceType::Block => virtio_blk(transport, dev_id), 55 DeviceType::GPU => { 56 warn!("Not support virtio_gpu device for now"); 57 } 58 DeviceType::Input => { 59 warn!("Not support virtio_input device for now"); 60 } 61 DeviceType::Network => virtio_net(transport, dev_id), 62 t => { 63 warn!("Unrecognized virtio device: {:?}", t); 64 } 65 } 66 } 67 68 /// # 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 69 /// 70 /// 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。 71 /// 72 /// ## 参数 73 /// 74 /// - list: &'a mut RwLockWriteGuard<'_, LinkedList<Box<dyn PciDeviceStructure>>> - 一个可写的PCI设备结构列表的互斥锁。 75 /// 76 /// ## 返回值 77 /// 78 /// 返回一个包含所有找到的virtio设备的数组 79 fn virtio_device_search<'a>( 80 list: &'a mut RwLockWriteGuard<'_, LinkedList<Box<dyn PciDeviceStructure>>>, 81 ) -> Vec<&'a mut PciDeviceStructureGeneralDevice> { 82 let mut virtio_list = Vec::new(); 83 let result = get_pci_device_structures_mut_by_vendor_id(list, 0x1AF4); 84 85 for device in result { 86 let standard_device = device.as_standard_device_mut().unwrap(); 87 let header = &standard_device.common_header; 88 if header.device_id >= 0x1000 && header.device_id <= 0x103F { 89 virtio_list.push(standard_device); 90 } 91 } 92 93 return virtio_list; 94 } 95