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Writing Device Drivers Oracle Solaris 10 1/13 Information Library |
Part I Designing Device Drivers for the Oracle Solaris Platform
1. Overview of Oracle Solaris Device Drivers
2. Oracle Solaris Kernel and Device Tree
5. Managing Events and Queueing Tasks
7. Device Access: Programmed I/O
10. Mapping Device and Kernel Memory
13. Hardening Oracle Solaris Drivers
14. Layered Driver Interface (LDI)
Part II Designing Specific Kinds of Device Drivers
15. Drivers for Character Devices
18. SCSI Host Bus Adapter Drivers
19. Drivers for Network Devices
Part III Building a Device Driver
22. Compiling, Loading, Packaging, and Testing Drivers
Preparing for Driver Installation
Compiling and Linking the Driver
Writing a Hardware Configuration File
Installing, Updating, and Removing Drivers
Copying the Driver to a Module Directory
Installing Drivers with add_drv
Stress, Performance, and Interoperability Testing
Installation and Packaging Testing
Testing Specific Types of Drivers
Asynchronous Communication Drivers
23. Debugging, Testing, and Tuning Device Drivers
24. Recommended Coding Practices
B. Summary of Solaris DDI/DKI Services
C. Making a Device Driver 64-Bit Ready
Opening a special file (accessing the device) that is associated with a device driver causes that driver to be loaded. You can use the modload(1M) command to load the driver into memory, but modload does not call any routines in the module. The preferred method is to open the device.
Normally, the system automatically unloads device drivers when the device is no longer in use. During development, you might want to use modunload(1M) to unload the driver explicitly. In order for modunload to be successful, the device driver must be inactive. No outstanding references to the device should exist, such as through open(2) or mmap(2).
The modunload command takes a runtime-dependent module_id as an argument. To find the module_id, use grep to search the output of modinfo(1M) for the driver name in question. Check in the first column.
# modunload -i module-id
To unload all currently unloadable modules, specify module ID zero:
# modunload -i 0
In addition to being inactive, the driver must have working detach(9E) and _fini(9E) routines for modunload(1M) to succeed.