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添加帧缓冲区抽象并实现vesafb的驱动 (#483)
- 添加bootparams对象 - 修正由于bus的driver、device强弱引用关系 不正确从而导致对象被释放的bug - 添加vesafb的驱动 - 实现framebuffer抽象层 - 为通用帧缓冲区抽象实现sysfs的属性 - 修改设备号DeviceNumber的定义 - 仿照linux，添加initcall，并在第一个内核线程中，调用他们。
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@ -4,10 +4,14 @@ use crate::kerror;
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use system_error::SystemError;
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use super::{
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device::{device_manager, mkdev, Device, DeviceNumber, IdTable, CHARDEVS, DEVMAP},
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device::{
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device_manager,
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device_number::{DeviceNumber, Major},
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Device, IdTable, CHARDEVS, DEVMAP,
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},
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map::{
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kobj_map, kobj_unmap, DeviceStruct, DEV_MAJOR_DYN_END, DEV_MAJOR_DYN_EXT_END,
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DEV_MAJOR_DYN_EXT_START, DEV_MAJOR_HASH_SIZE, DEV_MAJOR_MAX, MINOR_MASK,
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DEV_MAJOR_DYN_EXT_START, DEV_MAJOR_HASH_SIZE, DEV_MAJOR_MAX,
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},
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};
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@ -41,37 +45,39 @@ impl CharDevOps {
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/// @parameter: major: 主设备号
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/// @return: 返回下标
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#[allow(dead_code)]
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fn major_to_index(major: usize) -> usize {
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return major % DEV_MAJOR_HASH_SIZE;
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fn major_to_index(major: Major) -> usize {
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return (major.data() % DEV_MAJOR_HASH_SIZE) as usize;
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}
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/// @brief: 动态获取主设备号
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/// @parameter: None
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/// @return: 如果成功，返回主设备号，否则，返回错误码
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#[allow(dead_code)]
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fn find_dynamic_major() -> Result<usize, SystemError> {
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fn find_dynamic_major() -> Result<Major, SystemError> {
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let chardevs = CHARDEVS.lock();
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// 寻找主设备号为234～255的设备
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for index in (DEV_MAJOR_DYN_END..DEV_MAJOR_HASH_SIZE).rev() {
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if let Some(item) = chardevs.get(index) {
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for index in (DEV_MAJOR_DYN_END.data()..DEV_MAJOR_HASH_SIZE).rev() {
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if let Some(item) = chardevs.get(index as usize) {
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if item.is_empty() {
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return Ok(index); // 返回可用的主设备号
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return Ok(Major::new(index)); // 返回可用的主设备号
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}
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}
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}
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// 寻找主设备号在384～511的设备
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for index in (DEV_MAJOR_DYN_EXT_END + 1..DEV_MAJOR_DYN_EXT_START + 1).rev() {
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if let Some(chardevss) = chardevs.get(Self::major_to_index(index)) {
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for index in
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((DEV_MAJOR_DYN_EXT_END.data() + 1)..(DEV_MAJOR_DYN_EXT_START.data() + 1)).rev()
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{
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if let Some(chardevss) = chardevs.get(Self::major_to_index(Major::new(index))) {
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let mut flag = true;
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for item in chardevss {
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if item.device_number().major() == index {
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if item.device_number().major().data() == index {
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flag = false;
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break;
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}
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}
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if flag {
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// 如果数组中不存在主设备号等于index的设备
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return Ok(index); // 返回可用的主设备号
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return Ok(Major::new(index)); // 返回可用的主设备号
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}
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}
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}
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@ -86,7 +92,7 @@ impl CharDevOps {
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#[allow(dead_code)]
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pub fn register_chardev_region(
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from: DeviceNumber,
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count: usize,
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count: u32,
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name: &'static str,
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) -> Result<DeviceNumber, SystemError> {
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Self::__register_chardev_region(from, count, name)
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@ -99,11 +105,15 @@ impl CharDevOps {
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/// @return: 如果注册成功，返回，否则，返回false
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#[allow(dead_code)]
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pub fn alloc_chardev_region(
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baseminor: usize,
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count: usize,
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baseminor: u32,
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count: u32,
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name: &'static str,
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) -> Result<DeviceNumber, SystemError> {
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Self::__register_chardev_region(mkdev(0, baseminor), count, name)
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Self::__register_chardev_region(
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DeviceNumber::new(Major::UNNAMED_MAJOR, baseminor),
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count,
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name,
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)
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}
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/// @brief: 注册设备号
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@ -113,25 +123,25 @@ impl CharDevOps {
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/// @return: 如果注册成功，返回设备号，否则，返回错误码
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fn __register_chardev_region(
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device_number: DeviceNumber,
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minorct: usize,
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minorct: u32,
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name: &'static str,
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) -> Result<DeviceNumber, SystemError> {
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let mut major = device_number.major();
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let baseminor = device_number.minor();
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if major >= DEV_MAJOR_MAX {
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kerror!(
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"DEV {} major requested {} is greater than the maximum {}\n",
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"DEV {} major requested {:?} is greater than the maximum {}\n",
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name,
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major,
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DEV_MAJOR_MAX - 1
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DEV_MAJOR_MAX.data() - 1
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);
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}
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if minorct > MINOR_MASK + 1 - baseminor {
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if minorct > DeviceNumber::MINOR_MASK + 1 - baseminor {
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kerror!("DEV {} minor range requested ({}-{}) is out of range of maximum range ({}-{}) for a single major\n",
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name, baseminor, baseminor + minorct - 1, 0, MINOR_MASK);
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name, baseminor, baseminor + minorct - 1, 0, DeviceNumber::MINOR_MASK);
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}
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let chardev = DeviceStruct::new(mkdev(major, baseminor), minorct, name);
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if major == 0 {
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let chardev = DeviceStruct::new(DeviceNumber::new(major, baseminor), minorct, name);
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if major == Major::UNNAMED_MAJOR {
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// 如果主设备号为0,则自动分配主设备号
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major = Self::find_dynamic_major().expect("Find synamic major error.\n");
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}
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@ -157,7 +167,8 @@ impl CharDevOps {
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}
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items.insert(insert_index, chardev);
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}
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return Ok(mkdev(major, baseminor));
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return Ok(DeviceNumber::new(major, baseminor));
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}
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/// @brief: 注销设备号
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@ -167,7 +178,7 @@ impl CharDevOps {
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/// @return: 如果注销成功，返回()，否则，返回错误码
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fn __unregister_chardev_region(
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device_number: DeviceNumber,
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minorct: usize,
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minorct: u32,
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) -> Result<(), SystemError> {
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if let Some(items) = CHARDEVS
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.lock()
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@ -195,7 +206,7 @@ impl CharDevOps {
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id_table: IdTable,
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range: usize,
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) -> Result<(), SystemError> {
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if Into::<usize>::into(id_table.device_number()) == 0 {
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if id_table.device_number().data() == 0 {
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kerror!("Device number can't be 0!\n");
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}
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device_manager().add_device(cdev.clone())?;
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