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 use crate::kerror; 14 use crate::libs::rwlock::RwLockWriteGuard; 15 use crate::libs::spinlock::{SpinLock, SpinLockGuard}; 16 use crate::mm::virt_2_phys; 17 use crate::{ 18 driver::disk::ahci::{ 19 ahcidisk::LockedAhciDisk, 20 hba::HbaMem, 21 hba::{HbaPort, HbaPortType}, 22 }, 23 kdebug, 24 }; 25 use ahci_inode::LockedAhciInode; 26 use alloc::{boxed::Box, collections::LinkedList, format, string::String, sync::Arc, vec::Vec}; 27 use core::sync::atomic::compiler_fence; 28 use system_error::SystemError; 29 30 // 仅module内可见 全局数据区 hbr_port, disks 31 static LOCKED_HBA_MEM_LIST: SpinLock<Vec<&mut HbaMem>> = SpinLock::new(Vec::new()); 32 static LOCKED_DISKS_LIST: SpinLock<Vec<Arc<LockedAhciDisk>>> = SpinLock::new(Vec::new()); 33 34 const AHCI_CLASS: u8 = 0x1; 35 const AHCI_SUBCLASS: u8 = 0x6; 36 37 /* TFES - Task File Error Status */ 38 #[allow(non_upper_case_globals)] 39 pub const HBA_PxIS_TFES: u32 = 1 << 30; 40 41 /// @brief 寻找所有的ahci设备 42 /// @param list 链表的写锁 43 /// @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 44 fn ahci_device_search<'a>( 45 list: &'a mut RwLockWriteGuard<'_, LinkedList<Box<dyn PciDeviceStructure>>>, 46 ) -> Result<Vec<&'a mut Box<dyn PciDeviceStructure>>, SystemError> { 47 let result = get_pci_device_structure_mut(list, AHCI_CLASS, AHCI_SUBCLASS); 48 49 if result.is_empty() { 50 return Err(SystemError::ENODEV); 51 } 52 53 return Ok(result); 54 } 55 56 /// @brief: 初始化 ahci 57 pub fn ahci_init() -> Result<(), SystemError> { 58 let mut list = PCI_DEVICE_LINKEDLIST.write(); 59 let ahci_device = ahci_device_search(&mut list)?; 60 // 全局数据 - 列表 61 let mut disks_list = LOCKED_DISKS_LIST.lock(); 62 63 for device in ahci_device { 64 let standard_device = device.as_standard_device_mut().unwrap(); 65 standard_device.bar_ioremap(); 66 // 对于每一个ahci控制器分配一块空间 67 let ahci_port_base_vaddr = 68 Box::leak(Box::new([0u8; (1 << 20) as usize])) as *mut u8 as usize; 69 let virtaddr = standard_device 70 .bar() 71 .ok_or(SystemError::EACCES)? 72 .get_bar(5) 73 .or(Err(SystemError::EACCES))? 74 .virtual_address() 75 .unwrap(); 76 // 最后把这个引用列表放入到全局列表 77 let mut hba_mem_list = LOCKED_HBA_MEM_LIST.lock(); 78 //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 79 let hba_mem = unsafe { (virtaddr.data() as *mut HbaMem).as_mut().unwrap() }; 80 hba_mem_list.push(unsafe { (virtaddr.data() as *mut HbaMem).as_mut().unwrap() }); 81 let pi = volatile_read!(hba_mem.pi); 82 let hba_mem_index = hba_mem_list.len() - 1; 83 drop(hba_mem_list); 84 // 初始化所有的port 85 let mut id = 0; 86 for j in 0..32 { 87 if (pi >> j) & 1 > 0 { 88 let hba_mem_list = LOCKED_HBA_MEM_LIST.lock(); 89 let hba_mem_port = &mut hba_mem.ports[j]; 90 let tp = hba_mem_port.check_type(); 91 match tp { 92 HbaPortType::None => { 93 kdebug!("<ahci_rust_init> Find a None type Disk."); 94 } 95 HbaPortType::Unknown(err) => { 96 kdebug!("<ahci_rust_init> Find a Unknown({:?}) type Disk.", err); 97 } 98 _ => { 99 kdebug!("<ahci_rust_init> Find a {:?} type Disk.", tp); 100 101 // 计算地址 102 let fb = virt_2_phys(ahci_port_base_vaddr + (32 << 10) + (j << 8)); 103 let clb = virt_2_phys(ahci_port_base_vaddr + (j << 10)); 104 let ctbas = (0..32) 105 .map(|x| { 106 virt_2_phys( 107 ahci_port_base_vaddr + (40 << 10) + (j << 13) + (x << 8), 108 ) as u64 109 }) 110 .collect::<Vec<_>>(); 111 112 // 初始化 port 113 hba_mem_port.init(clb as u64, fb as u64, &ctbas); 114 drop(hba_mem_list); 115 compiler_fence(core::sync::atomic::Ordering::SeqCst); 116 // 创建 disk 117 disks_list.push(LockedAhciDisk::new( 118 format!("ahci_disk_{}", id), 119 BLK_GF_AHCI, 120 hba_mem_index as u8, 121 j as u8, 122 )?); 123 id += 1; // ID 从0开始 124 125 kdebug!("start register ahci device"); 126 127 // 挂载到devfs上面去 128 let ret = devfs_register( 129 format!("ahci_{}", id).as_str(), 130 LockedAhciInode::new(disks_list.last().unwrap().clone()), 131 ); 132 if let Err(err) = ret { 133 kerror!( 134 "Ahci_{} ctrl = {}, port = {} failed to register, error code = {:?}", 135 id, 136 hba_mem_index as u8, 137 j, 138 err 139 ); 140 } 141 } 142 } 143 } 144 } 145 BlockCache::init(); 146 } 147 148 compiler_fence(core::sync::atomic::Ordering::SeqCst); 149 return Ok(()); 150 } 151 152 /// @brief: 获取所有的 disk 153 #[allow(dead_code)] 154 pub fn disks() -> Vec<Arc<LockedAhciDisk>> { 155 let disks_list = LOCKED_DISKS_LIST.lock(); 156 return disks_list.clone(); 157 } 158 159 /// @brief: 通过 name 获取 disk 160 pub fn get_disks_by_name(name: String) -> Result<Arc<LockedAhciDisk>, SystemError> { 161 let disks_list: SpinLockGuard<Vec<Arc<LockedAhciDisk>>> = LOCKED_DISKS_LIST.lock(); 162 let result = disks_list 163 .iter() 164 .find(|x| x.0.lock().name == name) 165 .ok_or(SystemError::ENXIO)? 166 .clone(); 167 return Ok(result); 168 } 169 170 /// @brief: 通过 ctrl_num 和 port_num 获取 port 171 fn _port(ctrl_num: u8, port_num: u8) -> &'static mut HbaPort { 172 let list: SpinLockGuard<Vec<&mut HbaMem>> = LOCKED_HBA_MEM_LIST.lock(); 173 let port: &HbaPort = &list[ctrl_num as usize].ports[port_num as usize]; 174 175 return unsafe { (port as *const HbaPort as *mut HbaPort).as_mut().unwrap() }; 176 } 177