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Writing Device Drivers     Oracle Solaris 11.1 Information Library
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Part I Designing Device Drivers for the Oracle Solaris Platform

1.  Overview of Oracle Solaris Device Drivers

2.  Oracle 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 Oracle 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

Introduction to Host Bus Adapter Drivers

SCSI Interface

SCSA HBA Interfaces

SCSA HBA Entry Point Summary

SCSA HBA Data Structures

scsi_hba_tran() Structure

scsi_address Structure

scsi_device Structure

scsi_pkt Structure (HBA)

Per-Target Instance Data

Transport Structure Cloning

SCSA HBA Functions

HBA Driver Dependency and Configuration Issues

Declarations and Structures

Per-Command Structure

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

tran_tgt_init() Entry Point

tran_tgt_probe() Entry Point

tran_tgt_free() Entry Point

Resource Allocation

tran_init_pkt() Entry Point

Allocation and Initialization of a scsi_pkt(9S) Structure

Allocation of DMA Resources

Reallocation of DMA Resources for Data Transfer

tran_destroy_pkt() Entry Point

tran_sync_pkt() Entry Point

tran_dmafree() Entry Point

Command Transport

tran_start() Entry Point

Interrupt Handler and Command Completion

Timeout Handler

Capability Management

tran_getcap() Entry Point

tran_setcap() Entry Point

Abort and Reset Management

tran_abort() Entry Point

tran_reset() Entry Point

tran_bus_reset() Entry Point

tran_reset_notify() Entry Point

Dynamic Reconfiguration

SCSI HBA Driver Specific Issues

Installing HBA Drivers

HBA Configuration Properties

scsi-reset-delay Property

scsi-options Property

Per-Target scsi-options

x86 Target Driver Configuration Properties

Support for Queuing

19.  Drivers for Network Devices

20.  USB Drivers

21.  SR-IOV Drivers

Part III Building a Device Driver

22.  Compiling, Loading, Packaging, and Testing Drivers

23.  Debugging, Testing, and Tuning Device Drivers

24.  Recommended Coding Practices

Part IV Appendixes

A.  Hardware Overview

B.  Summary of Oracle Solaris DDI/DKI Services

C.  Making a Device Driver 64-Bit Ready

D.  Console Frame Buffer Drivers

E.  pci.conf File


Support for Queuing

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.