*class_data; //私有数据 struct class_device *parent; //父设备 void (*release)(struct class_device *dev); //释放对应类实际设 备的方法 int(*uevent)(struct class_device *dev,char **envp, int num_envp,char *buffer,int buffer_size); char class_id[BUS_IO_SIZE]; //类标志 } 调用函数...
内核中定义了struct class结构体,一个struct class 结构体类型变量对应一个类,内核同时提供了class_create()函数,可以用它来创建一个类,这个类存放于sysfs下面,一旦创建了这个类,再调用device_create()函数在/dev目录下创建相应的设备节点。这样,加载模块的时候,用户空间中的udev会自动响应device_create()函数,去/sy...
块设备驱动之——block_device、gendisk以及hd_struct之间的关系(一),程序员大本营,技术文章内容聚合第一站。
(1)一旦创建好了类,再调用device_create()函数来在/dev/目录下创建相应的设备节点,这样,加载模块的时候,用户空间中的udev会自动响应device_create()函数去寻找对应的类从而创建设备节点。 (2)device_create()函数实现 1484 * device_create - creates a device and registers it with sysfs 1485 * @class: poi...
* @class: The class of the device. * @groups: Optional attribute groups. * @release: Callback to free the device after all references have * gone away. This should be set by the allocator of the * device (i.e. the bus driver that discovered the device). ...
StRdev Device ID (if file is character or block special). StSize For regular files, the file size in bytes. StUid User ID of file. ThresholdClass This API supports the Mono for Android infrastructure and is not intended to be used directly from your code. (Inherited from Object) Thres...
USB_DEVICE_INFO(class, subclass, protocol) 创建一个structusb_device_id, 可用来只匹配一个特定类的 USB 设备. USB_INTERFACE_INFO(class, subclass, protocol) 创建一个structusb_device_id, 可用来只匹配一个特定类的 USB 接口. struct usb_device_id 结构提供了这个驱动支持的一个不同类型 USB 设备的列...
struct pipe_screen *nv30_screen_create(struct nouveau_device *dev){structnv30_screen*screen=CALLOC_STRUCT(nv30_screen);structpipe_screen*pscreen;structnouveau_pushbuf*push;structnv04_fifo*fifo;unsignedoclass =0;intret, i;if(!screen)returnNULL;switch(dev->chipset &0xf0) {case0x30:if(RANKINE...
class_dev_iter_init(&iter, &block_class, NULL, &disk_type); while ((dev = class_dev_iter_next(&iter))) { struct gendisk *disk = dev_to_disk(dev); struct hd_struct *part; struct block_device *part; if (strcmp(dev_name(dev), name)) continue; @@ -1590,13 +1553,12 @@ dev...
class BrushConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, string language) { return new SolidColorBrush((value is Color) ? (Color)value : Colors.Black); } public object ConvertBack(object value, Type targetType, object parameter, string language...