2006年12月11日 · To address this situation, the userspace I/O system (UIO) was designed. For typical industrial I/O cards, only a very small kernel module is needed. The main part of the driver will run in user space. This simplifies development and reduces the risk of serious bugs within a kernel module. Please note that UIO is not an universal driver interface.

If you use UIO for your card’s driver, here’s what you get: only one small kernel module to write and maintain. develop the main part of your driver in user space, with all the tools and libraries you’re used to.

The Userspace I/O framework (UIO) was introduced in Linux 2.6.23 and allows device drivers to be written almost entirely in userspace. UIO is suitable for hardware that does not fit into other kernel subsystems, like fieldbus cards, industrial I/O cards, or A/D converters. Programmers in industry who work with such hardware are rarely kernel ...

2019年9月30日 · 为了解决这种情况，设计了用户空间 i/o 系统 （uio）。对于典型的工业i/o卡，只需要一个非常小的内核模块。驱动程序的主要部分将在用户空间中运行。这简化了开发，并降低了内核模块中出现严重错误的风险。 请注意，uio 不是通用驱动程序接口。已

2011年8月19日 · This HOWTO describes concept and usage of Linux kernel's Userspace I/O system. 1. About this document. 1. Translations. 2. Preface. 3. Acknowledgments. 4. Feedback. 2. About UIO. 1. How UIO works. 3. Writing your own kernel module. 2. Adding an interrupt handler. 4. Writing a driver in userspace. 1. Getting information about your UIO device. 3.

2008年12月3日 · From: Edward Estabrook <[email protected]> Here is a patch that adds the ability to dynamically allocate (and use) coherent DMA from userspace by extending the userspace IO driver. This patch applies against 2.6.28-rc6.

Userspace I/O (UIO) drivers and realtime kernels often meet each other, since both are frequently used on embedded devices. Being designed to handle strange devices like FPGAs found on embedded boards, UIO is a simple and convenient way to implement a driver for such devices.

2022年9月26日 · DPDK可以使用Linux提供的uio_pci_generic模块绑定到指定网卡接口与UIO交互，此外DPDK还提供igb_uio用来绑定指定网卡接口与UIO交互；只不过从v20.02开始就默认把igb_uiodisable了，20.11开始则是把igb_uio完全移到了另一个Repository，新版本中想用的话还得另外把源码下回来；

UIO是Linux内核提供的用户态驱动框架，能够在用户空间运行设备驱动，内核中只需要编写和维护一小块内核模块。 使用UIO作为驱动程序，可以： 只需编写和维护一小块内核模块。

libuio is a light-wight C programming library to handle UIO device discovery and binding task. The library is based on the UIO example code lsuio v0.2.0 written by Hans J. Koch [email protected]. Hans J. Koch maintains UIO in the Linux kernel.