Command Descriptor Block | Ciprico Rimfire 3880 specs

Chapter 4 Command Operation
The Base Parameter Block	Page 4 - 5

Command Options, Addresses, and Transfer Count

You will use these fields of the Parameter Block to supply an address and transfer count when a data transfer is required by the command you wish to issue. There are also some command-modifying options available to you depending on the command you are issuing.

Target/Adapter ID - The Target/Adapter ID byte is very important to the command issue process. The value you supply here determines whether the command described in the Command Descriptor Block is a Pass-through command or an adapter Board-control command:

•If the ID = FFH, the command is a Board-control command.

•If the ID = 0-FH (0-15), the command is destined for the SCSI target or initiator with that ID.

Command Descriptor Block

In this part of the Parameter Block you must supply details about the command to be executed. The Command Descriptor Block will contain a SCSI command, a Target Mode response, or an adapter Board- control command. The RF3880 Board-control commands are explained in detail in Chapter 7. You can find more information about issuing Pass-through commands later in this chapter and in Chapters 5 and 6. For detail about actual SCSI commands, see a SCSI specification or your vendor-supplied peripheral documentation.

Command Code - This field will always contain a command code for either a Pass-through or an adapter Board-control command.

User’s Guide

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Ciprico Rimfire 3880 manual Command Descriptor Block

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