Introduction Characteristics of USB System Model What needs to be done Platform Issues Conceptual Issues Timeline USB Monitoring Final Presentation 10 th June 2001 David Harding Introduction to USB Reasons to Monitor USB Design of USBMon Capabilities of USBMon Demonstration Conclusion + Update Questions Dave Harding Final Presentation USB Monitoring 11 th June 2001

Introduction Characteristics of USB System Model What needs to be done Platform Issues Conceptual Issues Timeline Agenda Introduction to USB Reasons for Monitoring Design of USBMon Capabilities of USBMon Demonstration Conclusion and Update General Questions Introduction to USB Reasons to Monitor USB Design of USBMon Capabilities of USBMon Demonstration Conclusion + Update Questions Dave Harding Final Presentation USB Monitoring 11 th June 2001

Introduction Characteristics of USB System Model What needs to be done Platform Issues Conceptual Issues Timeline Universal Serial Bus Replacement for RS-232 serial and parallel interfaces. Higher Bandwidth (12 MBps total) Up to 127 devices connected to one port Wide diversity of devices from mice to ADSL modems and storage devices. Very Widely used. Multi-platform Multi-OS. Introduction to USB Reasons to Monitor USB Design of USBMon Capabilities of USBMon Demonstration Conclusion + Update Questions Dave Harding Final Presentation USB Monitoring 11 th June 2001

Introduction Characteristics of USB System Model What needs to be done Platform Issues Conceptual Issues Timeline Reasons to Monitor USB USB bandwidth can be viewed as a limited system resource that should be of interest to a system administrator. Debugging device drivers. Debugging devices. Reverse engineering of closed source device drivers. Debugging Host Controller Drivers. Introduction to USB Reasons to Monitor USB Design of USBMon Capabilities of USBMon Demonstration Conclusion + Update Questions Dave Harding Final Presentation USB Monitoring 11 th June 2001

Introduction Characteristics of USB System Model What needs to be done Platform Issues Conceptual Issues Timeline USB System Model Host computer Hub Camera Keyboard CD-ROM Scanner Printer Introduction to USB Reasons to Monitor USB Design of USBMon Capabilities of USBMon Demonstration Conclusion + Update Questions Dave Harding Final Presentation USB Monitoring 11 th June 2001

Introduction Characteristics of USB System Model What needs to be done Platform Issues Conceptual Issues Timeline USB System Model Traditional Hardware Monitoring Custom Hardware Undefined high- bandwidth link Monitoring computer Host computer Hub Camera Keyboard CD-ROM Scanner Printer Introduction to USB Reasons to Monitor USB Design of USBMon Capabilities of USBMon Demonstration Conclusion + Update Questions Dave Harding Final Presentation USB Monitoring 11 th June 2001

Introduction Characteristics of USB System Model What needs to be done Platform Issues Conceptual Issues Timeline Linux and USB Linux USB development started in kernel version Linux USB widely available and usable in kernel version (January 2001). Linux USB supports kernel and user space device drivers. Linux USB has a wide and growing number of device drivers. Introduction to USB Reasons to Monitor USB Design of USBMon Capabilities of USBMon Demonstration Conclusion + Update Questions Dave Harding Final Presentation USB Monitoring 11 th June 2001

Introduction Characteristics of USB System Model What needs to be done Platform Issues Conceptual Issues Timeline Host computer Hub Camera Keyboard CD-ROM Scanner Printer USB System Model Introduction to USB Reasons to Monitor USB Design of USBMon Capabilities of USBMon Demonstration Conclusion + Update Questions Dave Harding Final Presentation USB Monitoring 11 th June 2001

Introduction Characteristics of USB System Model What needs to be done Platform Issues Conceptual Issues Timeline Host computer Hub Camera Keyboard CD-ROM Scanner Printer Host controller driver USB core DD Linux Kernel USB System Model Introduction to USB Reasons to Monitor USB Design of USBMon Capabilities of USBMon Demonstration Conclusion + Update Questions Dave Harding Final Presentation USB Monitoring 11 th June 2001

Introduction Characteristics of USB System Model What needs to be done Platform Issues Conceptual Issues Timeline USB System Model Host computer Hub Camera Keyboard CD-ROM Scanner Printer Host controller driver Modified USB core DD Linux Kernel Debug Information Monitoring Application Introduction to USB Reasons to Monitor USB Design of USBMon Capabilities of USBMon Demonstration Conclusion + Update Questions Dave Harding Final Presentation USB Monitoring 11 th June 2001

Introduction Characteristics of USB System Model What needs to be done Platform Issues Conceptual Issues Timeline Design of USBMon 2 Parts – kernel patch Monitoring Application Interface via /proc filesystem Optional levels of monitoring on a per endpoint basis. Monitoring levels can be changed dynamically during run-time. Introduction to USB Reasons to Monitor USB Design of USBMon Capabilities of USBMon Demonstration Conclusion + Update Questions Dave Harding Final Presentation USB Monitoring 11 th June 2001

Introduction Characteristics of USB System Model What needs to be done Platform Issues Conceptual Issues Timeline Host controller driver USB core DD Linux Kernel Configuration Information Monitoring Application Existing Filesystem Existing Linux-USB configuration files Introduction to USB Reasons to Monitor USB Design of USBMon Capabilities of USBMon Demonstration Conclusion + Update Questions Dave Harding Final Presentation USB Monitoring 11 th June 2001

Introduction Characteristics of USB System Model What needs to be done Platform Issues Conceptual Issues Timeline Host controller driver Modified USB core DD Linux Kernel Debug Information Monitoring Application Use existing Configuration Channel, and create new Data channel Adapted Filesystem Existing Linux-USB configuration files New /proc files Level setting commands IN, Monitoring Information OUT Introduction to USB Reasons to Monitor USB Design of USBMon Capabilities of USBMon Demonstration Conclusion + Update Questions Dave Harding Final Presentation USB Monitoring 11 th June 2001

Introduction Characteristics of USB System Model What needs to be done Platform Issues Conceptual Issues Timeline Capabilities of USBMon Displays Bus topology and device details Able to selectively monitor different endpoints on different devices at differing monitoring levels. Able to report timing details of data transfers with microsecond accuracy. Minimal effect on other USB traffic. Able to trap the contents of a data transfer and display using various decoders. Introduction to USB Reasons to Monitor USB Design of USBMon Capabilities of USBMon Demonstration Conclusion + Update Questions Dave Harding Final Presentation USB Monitoring 11 th June 2001

Introduction Characteristics of USB System Model What needs to be done Platform Issues Conceptual Issues Timeline Demonstration Test Machine: 650 MHz Pentium III 128Mb SDRAM Integrated UHCI HC Red Hat 6.2 Linux kernel IBM JVM 1.3 Introduction to USB Reasons to Monitor USB Design of USBMon Capabilities of USBMon Demonstration Conclusion + Update Questions Dave Harding Final Presentation USB Monitoring 11 th June 2001

Introduction Characteristics of USB System Model What needs to be done Platform Issues Conceptual Issues Timeline Conclusion and Update Effective and Usable Monitoring tool. A number of real users. Strong interest from Linux USB community. “An interesting idea” – David Brownell, jUSB website. Ideas being considered for inclusion in code for 2.5 kernel. Introduction to USB Reasons to Monitor USB Design of USBMon Capabilities of USBMon Demonstration Conclusion + Update Questions Dave Harding Final Presentation USB Monitoring 11 th June 2001

Introduction Characteristics of USB System Model What needs to be done Platform Issues Conceptual Issues Timeline Questions Introduction to USB Reasons to Monitor USB Design of USBMon Capabilities of USBMon Demonstration Conclusion + Update Questions Dave Harding Final Presentation USB Monitoring 11 th June 2001

Introduction Characteristics of USB System Model What needs to be done Platform Issues Conceptual Issues Timeline