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Writing Device Drivers Oracle Solaris 11.1 Information Library |
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Writing Device Drivers Oracle Solaris 11.1 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
Introduction to Host Bus Adapter Drivers
HBA Driver Dependency and Configuration Issues
Entry Points for Module Initialization
_init() Entry Point (SCSI HBA Drivers)
_fini() Entry Point (SCSI HBA Drivers)
Autoconfiguration Entry Points
attach() Entry Point (SCSI HBA Drivers)
detach() Entry Point (SCSI HBA Drivers)
Entry Points for SCSA HBA Drivers
Target Driver Instance Initialization
Allocation and Initialization of a scsi_pkt(9S) Structure
Reallocation of DMA Resources for Data Transfer
tran_destroy_pkt() Entry Point
Interrupt Handler and Command Completion
tran_reset_notify() Entry Point
SCSI HBA Driver Specific Issues
x86 Target Driver Configuration Properties
19. Drivers for Network Devices
Part III Building a Device Driver
22. Compiling, Loading, Packaging, and Testing Drivers
23. Debugging, Testing, and Tuning Device Drivers
24. Recommended Coding Practices
B. Summary of Oracle Solaris DDI/DKI Services
C. Making a Device Driver 64-Bit Ready
For a definition of tagged queuing, refer to the SCSI-2 specification. To support tagged queuing, first check the scsi_options flag SCSI_OPTIONS_TAG to see whether tagged queuing is enabled globally. Next, check to see whether the target is a SCSI-2 device and whether the target has tagged queuing enabled. If these conditions are all true, attempt to enable tagged queuing by using scsi_ifsetcap(9F).
If tagged queuing fails, you can attempt to set untagged queuing. In this mode, you submit as many commands as you think necessary or optimal to the host adapter driver. Then the host adapter queues the commands to the target one command at a time, in contrast to tagged queuing. In tagged queuing, the host adapter submits as many commands as possible until the target indicates that the queue is full.
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