Creating Command List Structure | Ciprico Rimfire 3880 specs

Chapter 4 Command Operation

Page 4 - 20

Creating the Command List Structure

Creating the

Command List

Structure

To create a Command List Structure you should perform the following steps in the order indicated:

1.Select and clear a portion of memory that will contain the Command List. The Command List should start on a double word boundary. Enough space should be allocated to accommodate the Index information plus the Parameter and Status Blocks. Use the following information to determine the amount of space to allocate. (The value n is the number of Parameter Blocks and the value y is the number of Status Blocks to be held in each respective array.):

Index information = 32 bytes Parameter Block array = n x 28 bytes Status Block array = y x 16 bytes

Zero the indexes and set-up the Number of Parameter Blocks and Number of Status Block fields.

2.Issue a Start Command List command to the adapter within a Single Command Structure. An example of how to do this can be found on page 4 - 12.

3.Create Parameter Blocks in the reserved space, update the Parameter Block IN index. Write a 1 to the Channel Attention Port to begin execution.

4.Retrieve Status Blocks from the Status Block reserved area. Update the Status Block OUT index.

21020285 D

User’s Guide

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Ciprico Rimfire 3880 manual Creating Command List Structure, Command Operation Creating the Command List Structure

Contents

Rimfire 3880 Scsi Host Bus Adapter Page Page 21020285 D User’s Guide Preface Organization Initiator Mode Pass-through Commands Describes OrganizationOverview of the RF3880 User’s Guide Conventions ConventionsNotational Graphic Graphic Representation of Parameter Block Reference Documents 21020285 D Reference Documents Contents Scsi ID Status Block Format LUN LUN Table of Contents Description of Fields Command Identifier Diagnostic/Self-test 09H Table of Contents Table of Contents Introduction Summary Specifications Index O d u c t O v e r v i e w Buffering scheme Latest Bus SpecificationsAbout Rimfire Design Product Overview About the Rimfire 3880 Design Target Mode Implementation Buffer Management What next? Product Overview What next? R d w a r e E s s e n t i a l s Introduction SummaryHardware Essentials Introduction QLogic FAS Hardware Structure DescriptionIntel 80186XL Pipelined System Interface Data Buffer Block Diagram Hardware EssentialsGenerator blocks are part of the PSI Choosing a VMEbus Address Board AddressingChoosing an Address Modifier Hardware Essentials Board Addressing Hardware Essentials Hardware Ports General Hardware Port AddressesOverview of the Ports Hardware Port Addresses Hardware Essentials Hardware Ports General Address Buffer Port Writes Address Buffer PortHardware Essentials Address Buffer Port Address Modifier Field Hardware Essentials Address Buffer Port Control Field Control Field of Address Buffer Port Single Command Structure Address Fields Channel Attention PortHardware Essentials Channel Attention Port Channel Format Channel Attention Status Port Status Port Reset FormatStatus Port Reset Hardware Essentials Status Port Status Port Error Codes Status Port Error Codes Status Port General Format Status Port General Status Port Catastrophic Error Codes Chapter Hardware Essentials Status Port Reset Port Hardware Essentials Reset Port Descriptions of Port Usage Hardware Essentials Descriptions of Port Usage Hardware Essentials R d w a r e Installation Hardware Installation Introduction Overview Installation Process Hardware Installation Unpacking the Board Step Unpacking BoardShipping Damage Unpacking the Board Hardware Installation Jumpers and Termination Step Jumpers Termination Configuration Jumpers Default Jumper Settings Bus Request/ Grant Jumper Bus Request/Grant and Sysfail Jumpers Sysfail Jumper Addresses Example Base Address Jumper SettingsExample For the Address Modifier Jumper Replacement Fuse Scsi bus Termination Hardware Installation Board Insertion General Steps Power-up Sequence Hardware Installation Apply power and observe LEDsMeaning LED’s Error Conditions Selectable Options Step Configure Connect Scsi DevicesHardware Installation Configure and Connect Scsi Devices Options Scsi Cable Connector Cabling Hardware Installation M m a n d O p e r a t i o n Command Operation Introduction Command Operation What the Adapter must accomplish What the Adapter must accomplish Block BaseParameter Parameter Command Descriptor Block Status Block Format Command Operation Base Status BlockBase Status Block Base Status Block Command Operation Base Status Block Setting up Unit Options Multiple Status Blocks Command Operation Single Command Structure Single Command StructureFormat Single Command Structure Parameter Block Command Operation Single Command Structure Interrupt Bit-meanings of Interrupt Field Using a Single Command Structure Command Operation Using a Single Command Structure Command Operation Some Example Single Commands Some Example Single CommandsExample Start Command List Board-control Command Identifier = 822F4H Command = 01H Interrupt = 0300H 21020285 D User’s Guide Example 2Inquiry Pass-through Command Example Pass-through command PB Command Operation Command Operation Some Example Single Commands Command List Structure Format Command List StructureDescription of the Fields Parameter Block Space Number of Parameter BlocksNumber of Status Blocks Status Block Space Creating Command List Structure Command Operation Creating the Command List Structure Command Operation Using a Command List Structure Using a Command List StructureCommand Guidelines Index Guidelines Adding a Parameter Block Removing a Status Block Example ‘C’ Routines for Command List Command Operation Example ‘C’ Routines for Command List Stcdone Command Operation Example ‘C’ Routines for Command List Command Operation I t i a t o r t h r o u g h D e P a s s C o m m a n d s Initiator Mode Pass-through Commands Introduction Introduction Summary Target ID Command FormatInitiator Pass- through Parameter Block Format Address Modifier Bit-meanings of Flags-1 Field Setting DBV DAT and DIR Bits Using Table Values Example DAT and DIR bit settingsDIR and DAT Settings, Vendor-unique Table of DAT DIR Automatic Settings DAT and DIR Automatic Settings 4EH Initiator Mode Pass-through Commands Flags-2 Bit-meanings of Flag-2 FieldMeaning of TAG Opts Bits Scsi Command Descriptor Block VME Memory AddressTransfer Count Message Format Pass-through Message Parameter BlockMessage Code Description of Fields Scsi Pass-through Status BlockBit-meanings of Flags Field Error Scsi Status Field during Unexpected Scsi Phase Bit-meanings of Scsi Status FieldMeaning of Status Byte Code Three signals. This is described below Meaning of Status Byte Unexpected Phase Default Ordering of Sense Bytes Up to 32 Sequential Sense BytesOrdering of 1st 16 Sequential Sense Bytes Example of Selected Sense Bytes Initiator Mode Pass-through Commands R g e t t h r o u g h D e P a s s C o m m a n d s Target Mode Pass-through Commands Introduction What is Target Mode? Target Mode Pass-through Commands Overview of Target Mode Target Mode Pass-through Commands Adapter must have a means of handling Scsi protocol issuesWhat must the adapter accomplish in Target Mode? Target Mode Enable Command Overview Special Target Mode CommandsNew commands Target Mode Disable Command Command Descriptor Block Group Codes Scsi Command Descriptor Block Groups Command Operation Sequence Events Enabling Target ModeTarget Mode Pass-through Commands Command Operation Sequence Events Receiving a Command From an Initiator Sequence of Events Responding to an Initiator Target Selection Data Structure Target Selection Data Structure Meaning of Flags Field Meaning of Scsi Flags Field Initiator Identifier Command Descriptor Block LengthIdentify Message Received Message Bytes Received Semaphore Field Target Mode Response Command Target Mode Response Parameter BlockInitiator ID ⇒ Target Mode Response command Meaning of Response Control Flags Field Message Byte Status or 1st Message Byte Target Mode Response Command Status Block First TM Response Command Status BlockSecond TM Response Command Status Block Meaning of Status Block Flags Field Meaning of Command Status Flags Field Target Mode Error Sequence Codes Message Byte Received A r d c o n t r o l C o m m a n d s Board-control Commands Introduction Using the Reference Board-control Commands Using the Reference General Status Block Format Board-control Commands General Status BlockGeneral Status Block General Status Block List of Commands Board-control Commands List of CommandsBoard-control Commands Command List Memory Address Board-control Commands Start Command List 01HStart Command List Parameter Block Adapter ID Board-control Commands Start Command List 01H Interrupt Command Code Board-control Commands Stop Command List 02H Stop Command List Parameter Block Board-control Commands Identify 05H Identify Command Parameter BlockIdentify 05H Engineering Revision Identify Command Status BlockIdentify Command Status Block Firmware Revision Adapter Scsi ID Bits Board-control Commands Identify 05H Option FlagsOption Flags Field Identify Status Block Day, Month, Year Board-control Commands Board Statistics 06H Board Statistics Command Parameter BlockBoard Statistics 06H Board-control Commands Board Statistics 06H Options Options Field Target Mode Selection Count Total Commands ProcessedTotal Scsi Commands issued to an ID Statistics Data Structure General Options Command Parameter Block Command Format Description of FieldsBoard-control Commands General Options 07H General Options 07H Select Flags Bus ThrottleBus Throttle Field Values Select Flags Byte Command code for this command is 07H Unit Options 08H Board-control Commands Unit Options 08HUnit Options Command Parameter Block Unit Scsi ID Retry Control Board-control Commands Unit Options 08H Disconnect Time-outRetry Limit Retry Control Select Time-out Unit FlagsUnit Flags Initiator Mode Sense Count Selected Sense Bytes Example Use of Selected Sense Bytes Fields Example Selection of Sense Bytes Diagnostic/Self-test Parameter Block Diagnostic/ Self-test 09HBoard-control Commands Diagnostic/Self-test 09H Diagnostics Command Test Flags Field Command code for this operation is 09H Diagnostic Command Status Block Flags ByteBit-meanings of Flags Byte in Status Block Target Mode Enable Parameter Block Target Mode Enable 0AHBoard-control Commands Target Mode Enable 0AH Pointer to the Target Selection Data Structure Meaning of Selection Interrupt Field Target Mode Disable Parameter Block Target Mode Disable 0BHBoard-control Commands Target Mode Disable 0BH Meaning of Flags-1 Field Abort 0DH Board-control Commands Abort 0DHCommand Identifier of CMD to be Aborted Abort Parameter Block Scsi Hard Reset 10H Board-control Commands Scsi Hard Reset 10HScsi Hard Reset Parameter Block Board-control Commands Board Information 15H Board Information 15H Board Information Options Field Board-control Commands Board Information 15H OptionsBoard Information Data Structure Board Information Data Structure Board Information Select Flags Field Board-control Commands Board Information 15H Bus Throttle Board-control Commands Board Information 15H Option Flags RST Reset Jumper Board-control Commands Board Information 15H Termination Scsi Cfig BlockAdapter Base Model # Per Target Device Flags Per Target Retry LimitPer Target Sense Count Bit-meanings of Device Flags Field Per Target Synch Period Per Target Width Per Target Selected Sense Bytes Board-control Commands Extended Board Statistics 16H Extended Board Statistics 16HExtended Board Statistics Parameter Block Board-control Commands Extended Board Statistics 16H Options Extended Board Options Field Per Scsi Target Number of Commands Total Commands IssuedNumber of Scsi Parity Errors Extended Statistics Data Structure Board-control Commands Per Scsi Target Queue Full CountPer Scsi Target Maximum Queued Board-control Commands Extended Unit Options 18H Extended Unit Options 18HExtended Unit Options Parameter Block Extended Unit Options Data Structure Description of Fields Extended Unit Options Data Structure Bit-meanings of Retry Control Field Board-control Commands Extended Unit Options 18H Unit Flags Unit Flags of Extended Unit Options Board-control Commands Extended Unit Options 18H Selected Sense Bytes T a i l s o f U s a g e Details of Usage Introduction Example of Memory Differences Need for SwappingDetails of Usage Byte and Word Swapping Variations in Intel and Motorola Memory Pass-through command Parameters Intel Ordering Motorola Ordering Command Structure Swapping RF3880 Swapping OptionsIntel Ordered Parameter Block Data Swapping Sharing TapesDual Initiators Queuing How to UseTagged Tagged Details of Usage Tagged Queuing Choose a tag message Meaning of Flags-2 FieldRF3880 sends the tag message Queue Full Status UsageQueue Tag Numbers Message Reject Target Mode Usage Scsi Protocol Handling Scsi Bus Reset HandlingSelection Queue Target Mode Disable Command Handling Abort Command Handling Synchronous Data Transfer Requests Wide Data Transfer Requests Initiator-detected Error messages Parity error conditionsMessage parity errors Target Routines Disconnect Privilege Message HandlingMessage Bytes Received from the Initiator 21020285 D User’s Guide User’s Guide 21020285 D Details of Usage Error codes Status Block Error Codes Appendix a Error Codes IntroductionCodes Reported in Status Block and Status Port Appendix a Error Codes Summary Error Codes Appendix a Error Codes 2BH A1H Status Port Error Codes Catastrophic Error CodesAppendix a Error Codes Status Port Error Codes Self-test Error Codes Diagnostic Command Self-test Status Port Error Codes 8CH B l e s a n d C o n n e c t o r s Appendix B Cables and Connectors Introduction Cable Connector Pin-outs for the RF3886 ConnectorAppendix B Cables and Connectors Scsi Connector Maximum Cable Length VMEbus Connector Pinouts Appendix B Cables and Connectors VMEbus Connector PinoutsP1 Connector P2 Connector Retry Appendix B Cables and Connectors Specification s Appendix C Specifications Introduction Specifications Appendix C SpecificationsSpecifications for the Rf3880 Appendix C Specifications 21020285 D User’s Guide Fault s Appendix D Defaults Introduction Hardware Defaults Jumpers Hardware DefaultsAppendix D Defaults Hardware Defaults Defaults for Hardware Ports Defaults Appendix D DefaultsCommand Defaults TAG Appendix D Defaults S i g n D i f f e r e n c e s Appendix E Design Differences Introduction Scatter/Gather Operations Features no longer SupportedAppendix E Design Differences Features no longer Supported Byte and Word Swapping of Data Width of Data Transfers on the VMEbus Status Port Error Codes and Test FlagsAppendix E Design Differences Implementation Differences Extended Scsi ID’s Block Mode Transfers Scsi Data Widths How to Maximize Performance Odd-byte Addressing D e Index User’s Guide 21020285 D PSI Scsi ID Index Page 21020285 D