1 // 导出 ahci 相关的 module 2 pub mod ahci_inode; 3 pub mod ahcidisk; 4 pub mod hba; 5 6 use crate::driver::base::block::disk_info::BLK_GF_AHCI; 7 use crate::driver::block::cache::cached_block_device::BlockCache; 8 // 依赖的rust工具包 9 use crate::driver::pci::pci::{ 10 get_pci_device_structure_mut, PciDeviceStructure, PCI_DEVICE_LINKEDLIST, 11 }; 12 use crate::filesystem::devfs::devfs_register; 13 14 use crate::driver::disk::ahci::{ 15 ahcidisk::LockedAhciDisk, 16 hba::HbaMem, 17 hba::{HbaPort, HbaPortType}, 18 }; 19 use crate::libs::rwlock::RwLockWriteGuard; 20 use crate::libs::spinlock::{SpinLock, SpinLockGuard}; 21 use crate::mm::virt_2_phys; 22 use ahci_inode::LockedAhciInode; 23 use alloc::{boxed::Box, collections::LinkedList, format, string::String, sync::Arc, vec::Vec}; 24 use core::sync::atomic::compiler_fence; 25 use log::{debug, error}; 26 use system_error::SystemError; 27 28 // 仅module内可见 全局数据区 hbr_port, disks 29 static LOCKED_HBA_MEM_LIST: SpinLock<Vec<&mut HbaMem>> = SpinLock::new(Vec::new()); 30 static LOCKED_DISKS_LIST: SpinLock<Vec<Arc<LockedAhciDisk>>> = SpinLock::new(Vec::new()); 31 32 const AHCI_CLASS: u8 = 0x1; 33 const AHCI_SUBCLASS: u8 = 0x6; 34 35 /* TFES - Task File Error Status */ 36 #[allow(non_upper_case_globals)] 37 pub const HBA_PxIS_TFES: u32 = 1 << 30; 38 39 /// @brief 寻找所有的ahci设备 40 /// @param list 链表的写锁 41 /// @return Result<Vec<&'a mut Box<dyn PciDeviceStructure>>, SystemError> 成功则返回包含所有ahci设备结构体的可变引用的链表，失败则返回err 42 fn ahci_device_search<'a>( 43 list: &'a mut RwLockWriteGuard<'_, LinkedList<Box<dyn PciDeviceStructure>>>, 44 ) -> Result<Vec<&'a mut Box<dyn PciDeviceStructure>>, SystemError> { 45 let result = get_pci_device_structure_mut(list, AHCI_CLASS, AHCI_SUBCLASS); 46 47 if result.is_empty() { 48 return Err(SystemError::ENODEV); 49 } 50 51 return Ok(result); 52 } 53 54 /// @brief: 初始化 ahci 55 pub fn ahci_init() -> Result<(), SystemError> { 56 let mut list = PCI_DEVICE_LINKEDLIST.write(); 57 let ahci_device = ahci_device_search(&mut list)?; 58 // 全局数据 - 列表 59 let mut disks_list = LOCKED_DISKS_LIST.lock(); 60 61 for device in ahci_device { 62 let standard_device = device.as_standard_device_mut().unwrap(); 63 standard_device.bar_ioremap(); 64 // 对于每一个ahci控制器分配一块空间 65 let ahci_port_base_vaddr = 66 Box::leak(Box::new([0u8; (1 << 20) as usize])) as *mut u8 as usize; 67 let virtaddr = standard_device 68 .bar() 69 .ok_or(SystemError::EACCES)? 70 .get_bar(5) 71 .or(Err(SystemError::EACCES))? 72 .virtual_address() 73 .unwrap(); 74 // 最后把这个引用列表放入到全局列表 75 let mut hba_mem_list = LOCKED_HBA_MEM_LIST.lock(); 76 //这里两次unsafe转引用规避rust只能有一个可变引用的检查，提高运行速度 77 let hba_mem = unsafe { (virtaddr.data() as *mut HbaMem).as_mut().unwrap() }; 78 hba_mem_list.push(unsafe { (virtaddr.data() as *mut HbaMem).as_mut().unwrap() }); 79 let pi = volatile_read!(hba_mem.pi); 80 let hba_mem_index = hba_mem_list.len() - 1; 81 drop(hba_mem_list); 82 // 初始化所有的port 83 let mut id = 0; 84 for j in 0..32 { 85 if (pi >> j) & 1 > 0 { 86 let hba_mem_list = LOCKED_HBA_MEM_LIST.lock(); 87 let hba_mem_port = &mut hba_mem.ports[j]; 88 let tp = hba_mem_port.check_type(); 89 match tp { 90 HbaPortType::None => { 91 debug!("<ahci_rust_init> Find a None type Disk."); 92 } 93 HbaPortType::Unknown(err) => { 94 debug!("<ahci_rust_init> Find a Unknown({:?}) type Disk.", err); 95 } 96 _ => { 97 debug!("<ahci_rust_init> Find a {:?} type Disk.", tp); 98 99 // 计算地址 100 let fb = virt_2_phys(ahci_port_base_vaddr + (32 << 10) + (j << 8)); 101 let clb = virt_2_phys(ahci_port_base_vaddr + (j << 10)); 102 let ctbas = (0..32) 103 .map(|x| { 104 virt_2_phys( 105 ahci_port_base_vaddr + (40 << 10) + (j << 13) + (x << 8), 106 ) as u64 107 }) 108 .collect::<Vec<_>>(); 109 110 // 初始化 port 111 hba_mem_port.init(clb as u64, fb as u64, &ctbas); 112 drop(hba_mem_list); 113 compiler_fence(core::sync::atomic::Ordering::SeqCst); 114 // 创建 disk 115 disks_list.push(LockedAhciDisk::new( 116 format!("ahci_disk_{}", id), 117 BLK_GF_AHCI, 118 hba_mem_index as u8, 119 j as u8, 120 )?); 121 id += 1; // ID 从0开始 122 123 debug!("start register ahci device"); 124 125 // 挂载到devfs上面去 126 let ret = devfs_register( 127 format!("ahci_{}", id).as_str(), 128 LockedAhciInode::new(disks_list.last().unwrap().clone()), 129 ); 130 if let Err(err) = ret { 131 error!( 132 "Ahci_{} ctrl = {}, port = {} failed to register, error code = {:?}", 133 id, 134 hba_mem_index as u8, 135 j, 136 err 137 ); 138 } 139 } 140 } 141 } 142 } 143 BlockCache::init(); 144 } 145 146 compiler_fence(core::sync::atomic::Ordering::SeqCst); 147 return Ok(()); 148 } 149 150 /// @brief: 获取所有的 disk 151 #[allow(dead_code)] 152 pub fn disks() -> Vec<Arc<LockedAhciDisk>> { 153 let disks_list = LOCKED_DISKS_LIST.lock(); 154 return disks_list.clone(); 155 } 156 157 /// @brief: 通过 name 获取 disk 158 pub fn get_disks_by_name(name: String) -> Result<Arc<LockedAhciDisk>, SystemError> { 159 let disks_list: SpinLockGuard<Vec<Arc<LockedAhciDisk>>> = LOCKED_DISKS_LIST.lock(); 160 let result = disks_list 161 .iter() 162 .find(|x| x.0.lock().name == name) 163 .ok_or(SystemError::ENXIO)? 164 .clone(); 165 return Ok(result); 166 } 167 168 /// @brief: 通过 ctrl_num 和 port_num 获取 port 169 fn _port(ctrl_num: u8, port_num: u8) -> &'static mut HbaPort { 170 let list: SpinLockGuard<Vec<&mut HbaMem>> = LOCKED_HBA_MEM_LIST.lock(); 171 let port: &HbaPort = &list[ctrl_num as usize].ports[port_num as usize]; 172 173 return unsafe { (port as *const HbaPort as *mut HbaPort).as_mut().unwrap() }; 174 } 175