EDK II UEFI Driver Writer's Guide
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EDK II UEFI Driver Writer's Guide
Introduction
Tables
Figures
Examples
Acknowledgements
1 Introduction
2 UEFI Driver Implementation Checklist
3 Foundation
4 General Driver Design Guidelines
5 UEFI Services
6 UEFI Driver Categories
7 Driver Entry Point
8 Private Context Data Structures
9 Driver Binding Protocol
10 UEFI Service Binding Protocol
11 UEFI Driver and Controller Names
12 UEFI Driver Configuration
13 UEFI Driver Diagnostics
14 Driver Health Protocol
15 Driver Family Override Protocol
16 Driver Supported EFI Version Protocol
17 Bus-Specific Driver Override Protocol
18 PCI Driver Design Guidelines
19 USB Driver Design Guidelines
20 SCSI Driver Design Guidelines
21 ATA Driver Design Guidelines
21.1 ATA Host Controller Driver
21.2 ATA Bus Driver
22 Text Console Driver Design Guidelines
23 Graphics Driver Design Guidelines
24 Mass Storage Driver Design Guidelines
25 Network Driver Design Guidelines
26 User Credential Driver Design Guidelines
27 Load File Driver Design Guidelines
28 IPF Platform Porting Considerations
29 EFI Byte Code Porting Considerations
30 Building UEFI Drivers
31 Testing and Debugging UEFI Drivers
32 Distributing UEFI Drivers
Appendix A EDK II File Templates
Appendix B EDK II Sample Drivers
Appendix C Glossary
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21 ATA Driver Design Guidelines
There are several categories of ATA drivers that cooperate to provide the ATA driver stack in a platform. The following table lists these ATA drivers.

Table 33-Classes of ATA drivers

Class of driver
Description
ATA host controller driver
Consumes PCI I/O Protocol on the ATA host controller handle and produces the ATA Pass Thru Protocol used to access hard drives and the Ext SCSI Pass Thru Protocol used to access CD-ROM/DVD-ROM drives.
ATA bus driver
Consumes the ATA Pass Thru Protocol and creates child handles for ATA targets with the Device Path Protocol, Block I/O Protocol, Block I/O 2 Protocol, and optionally the Storage Security Command Protocol.
This chapter shows how to write UEFI Drivers for ATA host controllers. ATA drivers must follow all of the general design guidelines described in Chapter 4 of this guide. In addition, any ATA host controllers that are PCI controllers must also follow the PCIspecific design guidelines described in Chapter 18. This section covers the guidelines that apply specifically to the management of ATA host controllers. ATA drivers, especially those for RAID controllers, may include HII functionality for ATA subsystem configuration settings. HII functionality is described in Chapter 12 of this guide.
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20.3.3 I/O Protocol Implementations
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21.1 ATA Host Controller Driver
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