UDI, a Uniform Driver Interface

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UDI, a Uniform Driver Interface

• By
• Project UDI

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What is UDI?

• OS-Neutral
• Platform-Neutral
• Device Driver Interface

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Free and Open Specification

• Published on the Web
• No Licensing Fees
• Developed Jointly by SCO and Other Project UDI
  Members

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Who is Project UDI?
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UDI Driver Portability

• 100 Driver Source Portability
• Defines architecture, APIs and packaging format
• Binary Portability
• IA-32 and IA-64 ABIs defined
• Source and Binary Distributions

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Single UDI Driver - Many OSes
Today
With UDI
Proprietary driver interfaces
Common driver interface
...
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The UDI Solution

• One driver source for all UDI-compliant OSes
• UDI moves up IHV porting order
• More bang for the buck for IHVs
• UDI-compliant OSes get better coverage

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UDI News Headlines
Uniform Driver Interface Spells Relief - EE Times
Intel, Computer Makers to Forge Common Guidelines
for Unix - Wall Street Journal
Heavyweights Unite Behind Interface for Unix
Servers - PC Week
Intel Moves Closer to Unix in Standards Effort -
Information Week
Intel Pushing Unified Unix - InfoWorld/C-Net
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Uniformity Across Device Types

• Common Execution Model
• Common Data Model
• Common Inter-Module Communication
• Common System Services

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UDI Fully Encapsulates Drivers
Application Programs
I/O Requests
Operating System
UDI Environment
System Services Configuration Resource
Allocation Inter-Module Communication
Tracing Logging Error Handling Time
Management Buffer Management
UDI Drivers
Physical I/O Abstraction
CPU and I/O Hardware (PIO, DMA, Interrupts)
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Path From Application to DriverIntegrated
Implementation
Application
OS Requests
Embedding OS
I/O Subsystem
UDI Environment
UDI Channel Operations
UDI Driver
UDI Services
Physical I/O
Interrupts
Hardware Access
Adapter or System Hardware
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UDI Next-Generation Technology

• Instance Independence
• Hot plug/hot swap adapters and devices
• Location Independence
• Distributed environments and I/O processors

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UDI Next-Generation Technology(continued)

• Implicit MP Synchronization
• No lock primitives
• Support for Field-Installable 3rd-Party
  Extensions
• Adds new device models

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UDI In Action

• First Prototype Completed 12/9/97

Adapters Adaptec SCSI Interphase 100BT
UDI
IBM AIX PowerPC
HP-UX 32 bit PA_RISC
Single Driver Source, no ifdefs, No modifications
SCO Unixware 32 bit Intel
SUN Solaris 32 bit UltraSparc
NCR MP-RAS 32 bit Intel
Tru64 UNIX 64 bit Alpha
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UDI Information

• Web page
• http//www.sco.com/UDI