Command Operation | Ciprico Rimfire 3880 guide

Chapter 6 Target Mode Pass-through Commands

Command Operation

Page 6 - 7

Command

Operation

Sequence of

Events—

Enabling

Target Mode

Note

When Target Mode is terminated, whether by a Disable Target Mode command or by a SCSI bus Reset, the Target Selection Data Structure will be written by the adapter, with the TME bit of the Flags field cleared. Additionally, if a SCSI bus reset occurred, an error of 27H will be reported in the Error field

In this section, the sequence of events that can be expected and the parts that the adapter and Host must play are described.

The following sequence must occur to ensure proper operation of Target Mode:.

1.Host allocates 32 bytes of memory for the Target Selection Data Structure, to be used by the adapter when it is selected by an initiator.

2.The Host issues a Target Mode Enable command to the RF3880. The address of the Target Selection Data Structure is passed in the command.

3.The adapter is ready to accept selection by an initiator and will remain so until a SCSI Reset occurs or the Host issues a Target Mode Disable command.

User’s Guide

21020285 D

Image 109

Ciprico Rimfire 3880 manual Command Operation, Sequence Events Enabling Target Mode

Contents

Rimfire 3880 Scsi Host Bus Adapter Page Page 21020285 D User’s Guide Preface Organization Organization Initiator Mode Pass-through Commands DescribesOverview of the RF3880 User’s Guide Notational Graphic ConventionsConventions Graphic Representation of Parameter Block 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 About Rimfire Design Latest Bus SpecificationsBuffering scheme Product Overview About the Rimfire 3880 Design 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 Summary IntroductionHardware Essentials Introduction Intel 80186XL Hardware Structure DescriptionQLogic FAS Pipelined System Interface Data Buffer Hardware Essentials Block DiagramGenerator blocks are part of the PSI Choosing an Address Modifier Board AddressingChoosing a VMEbus Address Hardware Essentials Board Addressing Overview of the Ports Hardware Port AddressesHardware Essentials Hardware Ports General Hardware Port Addresses Hardware Essentials Hardware Ports General Hardware Essentials Address Buffer Port Address Buffer PortAddress Buffer Port Writes Address Modifier Field Control Field of Address Buffer Port Hardware Essentials Address Buffer Port Control Field Channel Attention Port Single Command Structure Address FieldsHardware Essentials Channel Attention Port Channel Attention Channel Format Status Port Reset Status Port Reset FormatStatus Port Hardware Essentials 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 Step Unpacking Board Hardware Installation Unpacking the 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 Example Example Base Address Jumper SettingsAddresses For the Address Modifier Jumper Scsi bus Termination Replacement Fuse General Steps Hardware Installation Board Insertion Hardware Installation Apply power and observe LEDs Power-up SequenceMeaning LED’s Error Conditions Hardware Installation Configure and Connect Scsi Devices Step Configure Connect Scsi DevicesSelectable Options 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 BaseBlock Parameter Command Descriptor Block Base Status Block Command Operation Base Status BlockStatus Block Format Base Status Block Command Operation Base Status Block Multiple Status Blocks Setting up Unit Options Format Single Command Structure Single Command StructureCommand Operation Single Command Structure Parameter Block Bit-meanings of Interrupt Field Command Operation Single Command Structure Interrupt Command Operation Using a Single Command Structure Using a Single Command Structure Example Start Command List Board-control Some Example Single CommandsCommand Operation Some Example Single Commands Command Identifier = 822F4H 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 Format Command List Structure Command List StructureDescription of the Fields Number of Status Blocks Number of Parameter BlocksParameter Block Space Status Block Space Command Operation Creating the Command List Structure Creating Command List Structure Command Guidelines Using a Command List StructureCommand Operation Using a Command List Structure Index Guidelines 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 Initiator Pass- through Parameter Block Format Command FormatTarget ID Address Modifier Bit-meanings of Flags-1 Field Example DAT and DIR bit settings Setting DBV DAT and DIR Bits Using Table ValuesDIR and DAT Settings, Vendor-unique DAT and DIR Automatic Settings Table of DAT DIR Automatic Settings 4EH Initiator Mode Pass-through Commands Bit-meanings of Flag-2 Field Flags-2Meaning of TAG Opts Bits VME Memory Address Scsi Command Descriptor BlockTransfer Count Pass-through Message Parameter Block Message FormatMessage Code Scsi Pass-through Status Block Description of FieldsBit-meanings of Flags Field Error Bit-meanings of Scsi Status Field Scsi Status Field during Unexpected Scsi PhaseMeaning of Status Byte Code Meaning of Status Byte Unexpected Phase Three signals. This is described below Up to 32 Sequential Sense Bytes Default Ordering of 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? Adapter must have a means of handling Scsi protocol issues Target Mode Pass-through CommandsWhat must the adapter accomplish in Target Mode? New commands Overview Special Target Mode CommandsTarget Mode Enable Command Target Mode Disable Command Scsi Command Descriptor Block Groups Command Descriptor Block Group Codes Sequence Events Enabling Target Mode Command OperationTarget 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 Identify Message Received Command Descriptor Block LengthInitiator Identifier Message Bytes Received Semaphore Field Target Mode Response Parameter Block Target Mode Response CommandInitiator ID ⇒ Target Mode Response command Meaning of Response Control Flags Field Status or 1st Message Byte Message Byte First TM Response Command Status Block Target Mode 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 Format General Status Block Board-control Commands List of Commands List of CommandsBoard-control Commands Start Command List Parameter Block Board-control Commands Start Command List 01HCommand List Memory Address Adapter ID Command Code Board-control Commands Start Command List 01H Interrupt Stop Command List Parameter Block Board-control Commands Stop Command List 02H Identify Command Parameter Block Board-control Commands Identify 05HIdentify 05H Identify Command Status Block Identify Command Status BlockEngineering Revision Firmware Revision Option Flags Field Identify Status Block Board-control Commands Identify 05H Option FlagsAdapter Scsi ID Bits Day, Month, Year Board Statistics Command Parameter Block Board-control Commands Board Statistics 06HBoard Statistics 06H Options Field Board-control Commands Board Statistics 06H Options Total Scsi Commands issued to an ID Total Commands ProcessedTarget Mode Selection Count Statistics Data Structure Board-control Commands General Options 07H Command Format Description of FieldsGeneral Options Command Parameter Block General Options 07H Bus Throttle Field Values Bus ThrottleSelect Flags Select Flags Byte Command code for this command is 07H Unit Options Command Parameter Block Board-control Commands Unit Options 08HUnit Options 08H Unit Scsi ID Retry Limit Board-control Commands Unit Options 08H Disconnect Time-outRetry Control Retry Control Unit Flags Select Time-outUnit Flags Sense Count Initiator Mode Selected Sense Bytes Example Selection of Sense Bytes Example Use of Selected Sense Bytes Fields Board-control Commands Diagnostic/Self-test 09H Diagnostic/ Self-test 09HDiagnostic/Self-test Parameter Block Diagnostics Command Test Flags Field Command code for this operation is 09H Flags Byte Diagnostic Command Status BlockBit-meanings of Flags Byte in Status Block Board-control Commands Target Mode Enable 0AH Target Mode Enable 0AHTarget Mode Enable Parameter Block Pointer to the Target Selection Data Structure Meaning of Selection Interrupt Field Board-control Commands Target Mode Disable 0BH Target Mode Disable 0BHTarget Mode Disable Parameter Block Meaning of Flags-1 Field Command Identifier of CMD to be Aborted Board-control Commands Abort 0DHAbort 0DH Abort Parameter Block Board-control Commands Scsi Hard Reset 10H 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 Options Field Board Information Data Structure Board Information Select Flags Field Board-control Commands Board Information 15H Bus Throttle RST Reset Jumper Board-control Commands Board Information 15H Option Flags Scsi Cfig Block Board-control Commands Board Information 15H TerminationAdapter Base Model # Per Target Sense Count Per Target Retry LimitPer Target Device Flags Bit-meanings of Device Flags Field Per Target Synch Period Per Target Selected Sense Bytes Per Target Width Extended Board Statistics 16H Board-control Commands Extended Board Statistics 16HExtended Board Statistics Parameter Block Extended Board Options Field Board-control Commands Extended Board Statistics 16H Options Number of Scsi Parity Errors Total Commands IssuedPer Scsi Target Number of Commands Extended Statistics Data Structure Per Scsi Target Queue Full Count Board-control CommandsPer Scsi Target Maximum Queued Extended Unit Options 18H Board-control Commands 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 Details of Usage Byte and Word Swapping Need for SwappingExample of Memory Differences Variations in Intel and Motorola Memory Pass-through command Parameters Motorola Ordering Intel Ordering RF3880 Swapping Options Command Structure SwappingIntel Ordered Parameter Block Sharing Tapes Data SwappingDual Initiators Tagged How to UseQueuing Tagged Meaning of Flags-2 Field Details of Usage Tagged Queuing Choose a tag messageRF3880 sends the tag message Queue Tag Numbers UsageQueue Full Status Message Reject Scsi Bus Reset Handling Target Mode Usage Scsi Protocol HandlingSelection Queue Abort Command Handling Synchronous Data Transfer Requests Target Mode Disable Command Handling Wide Data Transfer Requests Message parity errors Parity error conditionsInitiator-detected Error messages Target Routines Message Handling Disconnect PrivilegeMessage Bytes Received from the Initiator 21020285 D User’s Guide User’s Guide 21020285 D Details of Usage Error codes Appendix a Error Codes Introduction Status Block Error CodesCodes Reported in Status Block and Status Port Error Codes Appendix a Error Codes Summary 2BH Appendix a Error Codes A1H Catastrophic Error Codes Status Port 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 Appendix B Cables and Connectors Scsi Connector ConnectorCable Connector Pin-outs for the RF3886 Maximum Cable Length Appendix B Cables and Connectors VMEbus Connector Pinouts VMEbus Connector PinoutsP1 Connector Retry P2 Connector Appendix B Cables and Connectors Specification s Appendix C Specifications Introduction Appendix C Specifications SpecificationsSpecifications for the Rf3880 Appendix C Specifications 21020285 D User’s Guide Fault s Appendix D Defaults Introduction Appendix D Defaults Hardware Defaults Hardware DefaultsHardware Defaults Jumpers Defaults for Hardware Ports Appendix D Defaults 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 Appendix E Design Differences Features no longer Supported Features no longer SupportedScatter/Gather Operations Byte and Word Swapping of Data Appendix E Design Differences Implementation Differences Status Port Error Codes and Test FlagsWidth of Data Transfers on the VMEbus Extended Scsi ID’s 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