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Writing Device Drivers
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Part I Designing Device Drivers for the Solaris Platform

1.  Overview of Solaris Device Drivers

2.  Solaris Kernel and Device Tree

3.  Multithreading

4.  Properties

5.  Managing Events and Queueing Tasks

6.  Driver Autoconfiguration

7.  Device Access: Programmed I/O

8.  Interrupt Handlers

9.  Direct Memory Access (DMA)

10.  Mapping Device and Kernel Memory

11.  Device Context Management

12.  Power Management

13.  Hardening Solaris Drivers

14.  Layered Driver Interface (LDI)

Part II Designing Specific Kinds of Device Drivers

15.  Drivers for Character Devices

16.  Drivers for Block Devices

17.  SCSI Target Drivers

18.  SCSI Host Bus Adapter Drivers

19.  Drivers for Network Devices

20.  USB Drivers

Part III Building a Device Driver

21.  Compiling, Loading, Packaging, and Testing Drivers

22.  Debugging, Testing, and Tuning Device Drivers

Testing Drivers

Enable the Deadman Feature to Avoid a Hard Hang

Testing With a Serial Connection

To Set Up the Host System for a tip Connection

Setting Up a Target System on the SPARC Platform

Setting Up a Target System on the x86 Platform

Setting Up Test Modules

Setting Kernel Variables

Loading and Unloading Test Modules

Setting kmem_flags Debugging Flags

Avoiding Data Loss on a Test System

Back Up Critical System Files

To Boot With an Alternate Kernel

Consider Alternative Back-Up Plans

Capture System Crash Dumps

Recovering the Device Directory

Debugging Tools

Postmortem Debugging

Using the kmdb Kernel Debugger

Booting kmdb With an Alternate Kernel on the SPARC Platform

Booting kmdb With an Alternate Kernel on the x86 Platform

Setting Breakpoints in kmdb

kmdb Macros for Driver Developers

Using the mdb Modular Debugger

Getting Started With the Modular Debugger

Useful Debugging Tasks With kmdb and mdb

Exploring System Registers With kmdb

Detecting Kernel Memory Leaks

Writing Debugger Commands With mdb

Obtaining Kernel Data Structure Information

Obtaining Device Tree Information

Retrieving Driver Soft State Information

Modifying Kernel Variables

Tuning Drivers

Kernel Statistics

Kernel Statistics Structure Members

Kernel Statistics Structures

Kernel Statistics Functions

Kernel Statistics for Solaris Ethernet Drivers

DTrace for Dynamic Instrumentation

23.  Recommended Coding Practices

Part IV Appendixes

A.  Hardware Overview

B.  Summary of Solaris DDI/DKI Services

C.  Making a Device Driver 64-Bit Ready

D.  Console Frame Buffer Drivers


Chapter 22

Debugging, Testing, and Tuning Device Drivers

This chapter presents an overview of the various tools that are provided to assist with testing, debugging, and tuning device drivers. This chapter provides information on the following subjects: