Tagged, Queuing, How to Use | Ciprico Rimfire 3880 specification

			Chapter 8 Details of Usage
	Page 8 - 8		Tagged Queuing
	Tagged		The SCSI-2 and SCSI-3 specification provide a protocol for queuing commands
	Queuing		at the device level. The device is responsible for managing the order of the
	Queuing		commands, basing the order on message information from the initiator; the tag

			message used by the initiator instructs the device where to place the command
			in its queue. The initiator also uniquely numbers each command to identify it.
			The RF3880 fully supports the tagged queuing protocol. This section describes
			the RF3880 implementation of tagged queuing and how to use it.
	How to Use		The RF3880 implementation of this SCSI-2 and SCSI-3 option is very simple
	Tagged		to use. These are the steps:
	Queuing		1. Enable Tagged Queuing

Note

If your SCSI-2 or SCSI- 3 device is operating with tagged queuing, the Queue Full Count and Maximum Queued fields of the Extended Board Statistics command (16H) will contain values. See Chapter 7.

In order to use the SCSI-2 and SCSI-3 option of Tagged Queuing, you must be sure that it is enabled on both the adapter and SCSI device.

A. Enabling on the RF3880

For the RF3880, tagged queuing is enabled for use with a device by issuing a Unit Options or Extended Unit Options command with the TAG bit of the Unit Flags field set before you issue any commands you want to tag. The RF3880 will only send tagged messages to a device if this flag has been set. This could be done during initialization.

B. Enabling on a SCSI Device

You may also need to enable tagged queuing on your SCSI device with a Page 0AH Mode Select. See your vendor-supplied documentation for more information. The RF3880 will not send an error to the Host if your device rejects the queue tag message.

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User’s Guide

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Ciprico Rimfire 3880 manual Tagged, Queuing, How to Use

Contents

Rimfire 3880 Scsi Host Bus Adapter Page Page 21020285 D User’s Guide Preface Organization Overview of the RF3880 User’s Guide Initiator Mode Pass-through Commands DescribesOrganization 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 Hardware Essentials Introduction IntroductionSummary QLogic FAS Hardware Structure DescriptionIntel 80186XL Pipelined System Interface Data Buffer Generator blocks are part of the PSI Block DiagramHardware Essentials 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 Hardware Essentials Channel Attention Port Single Command Structure Address FieldsChannel 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 Shipping Damage Unpacking the Board Hardware Installation Unpacking the BoardStep Unpacking 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 Meaning LED’s Power-up SequenceHardware Installation Apply power and observe LEDs 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 Description of the Fields Command List StructureFormat Command List Structure 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 DIR and DAT Settings, Vendor-unique Setting DBV DAT and DIR Bits Using Table ValuesExample DAT and DIR bit settings Table of DAT DIR Automatic Settings DAT and DIR Automatic Settings 4EH Initiator Mode Pass-through Commands Meaning of TAG Opts Bits Flags-2Bit-meanings of Flag-2 Field Transfer Count Scsi Command Descriptor BlockVME Memory Address Message Code Message FormatPass-through Message Parameter Block Bit-meanings of Flags Field Description of FieldsScsi Pass-through Status Block Error Meaning of Status Byte Code Scsi Status Field during Unexpected Scsi PhaseBit-meanings of Scsi Status Field Three signals. This is described below Meaning of Status Byte Unexpected Phase Ordering of 1st 16 Sequential Sense Bytes Default Ordering of Sense BytesUp to 32 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 What must the adapter accomplish in Target Mode? Target Mode Pass-through CommandsAdapter must have a means of handling Scsi protocol issues Target Mode Enable Command Overview Special Target Mode CommandsNew commands Target Mode Disable Command Command Descriptor Block Group Codes Scsi Command Descriptor Block Groups Target Mode Pass-through Commands Command Operation Command OperationSequence Events Enabling Target Mode 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 Initiator ID Target Mode Response CommandTarget Mode Response Parameter Block ⇒ Target Mode Response command Meaning of Response Control Flags Field Message Byte Status or 1st Message Byte Second TM Response Command Status Block Target Mode Response Command Status BlockFirst 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 Board-control Commands List of CommandsBoard-control Commands List of 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 Identify 05H Board-control Commands Identify 05HIdentify Command Parameter Block 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 Statistics 06H Board-control Commands Board Statistics 06HBoard Statistics Command Parameter Block 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 Unit Flags Select Time-outUnit 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 Bit-meanings of Flags Byte in Status Block Diagnostic Command Status BlockFlags Byte 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 Parameter Block Scsi Hard Reset 10HBoard-control Commands Scsi Hard Reset 10H 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 Adapter Base Model # Board-control Commands Board Information 15H TerminationScsi Cfig Block 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 Extended Board Statistics Parameter Block Board-control Commands Extended Board Statistics 16HExtended Board Statistics 16H 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 Per Scsi Target Maximum Queued Board-control CommandsPer Scsi Target Queue Full Count Extended Unit Options Parameter Block Board-control Commands Extended Unit Options 18HExtended Unit Options 18H 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 Intel Ordered Parameter Block Command Structure SwappingRF3880 Swapping Options Dual Initiators Data SwappingSharing Tapes Queuing How to UseTagged Tagged RF3880 sends the tag message Details of Usage Tagged Queuing Choose a tag messageMeaning of Flags-2 Field Queue Full Status UsageQueue Tag Numbers Message Reject Selection Queue Target Mode Usage Scsi Protocol HandlingScsi Bus Reset Handling 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 Message Bytes Received from the Initiator Disconnect PrivilegeMessage Handling 21020285 D User’s Guide User’s Guide 21020285 D Details of Usage Error codes Codes Reported in Status Block and Status Port Status Block Error CodesAppendix a Error Codes Introduction Appendix a Error Codes Summary Error Codes Appendix a Error Codes 2BH A1H Appendix a Error Codes Status Port Error Codes Status Port Error CodesCatastrophic 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 P1 Connector VMEbus Connector PinoutsAppendix B Cables and Connectors VMEbus Connector Pinouts P2 Connector Retry Appendix B Cables and Connectors Specification s Appendix C Specifications Introduction Specifications for the Rf3880 SpecificationsAppendix C Specifications 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 Command Defaults DefaultsAppendix D 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