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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

Sun Fault Management Architecture I/O Fault Services

What Is Predictive Self-Healing?

Solaris Fault Manager

Diagnosis, Suspect Lists, and Fault Events

Response Agents

Message IDs and Dictionary Files

System Topology

Error Handling

Declaring Fault Management Capabilities

Cleaning Up Fault Management Resources

Getting the Fault Management Capability Bit Mask

Reporting Errors

Access Attributes Structure

DMA Attributes Structure

Getting Error Status

Clearing Errors

Registering an Error Handler

Fault Management Data and Status Structure

Diagnosing Faults

Standard Leaf Device Diagnosis

Specialized Device Diagnosis

Event Registry



Defensive Programming Techniques for Solaris Device Drivers

Using Separate Device Driver Instances

Exclusive Use of DDI Access Handles

Detecting Corrupted Data

Corruption of Device Management and Control Data

Corruption of Received Data

DMA Isolation

Handling Stuck Interrupts

Additional Programming Considerations

Thread Interaction

Threats From Top-Down Requests

Adaptive Strategies

Driver Hardening Test Harness

Fault Injection

Setting Up the Test Harness

Installing the Test Harness

Configuring the Test Harness

Testing the Driver

Creating Faults

Injecting Faults

Fault-Injection Process

Test Harness Warnings

Using Scripts to Automate the Test Process

Automated Test Process

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

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 13

Hardening Solaris Drivers

Fault Management Architecture (FMA) I/O Fault Services enable driver developers to integrate fault management capabilities into I/O device drivers. The Solaris I/O fault services framework defines a set of interfaces that enable all drivers to coordinate and perform basic error handling tasks and activities. The Solaris FMA as a whole provides for error handling and fault diagnosis, in addition to response and recovery. FMA is a component of Sun's Predictive Self-Healing strategy.

A driver is considered hardened when it uses the defensive programming practices described in this document in addition to the I/O fault services framework for error handling and diagnosis. The driver hardening test harness tests that the I/O fault services and defensive programming requirements have been correctly fulfilled.

This document contains the following sections: