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ISO/IEC 14776-224:2019 Information technology - Small computer system interface (SCSI) - Part 224: Fibre Channel Protocol for SCSI, fourth version (FCP-4), 2019
- CONTENTS
- FOREWORD
- INTRODUCTION
- 1 Scope
- 2 Normative references
- 3 Terms, definitions, abbreviations and conventions [Go to Page]
- 3.1 Terms and definitions [Go to Page]
- 3.1.1
- acknowledged class
- 3.1.2
- address identifier
- 3.1.3
- application client
- 3.1.4
- application client buffer offset
- 3.1.5
- command
- 3.1.6
- command descriptor block
- CDB
- 3.1.7
- command identifier
- 3.1.8
- data buffer size
- 3.1.9
- Data frame
- 3.1.10
- data overlay
- 3.1.11
- Destination_Identifier
- D_ID
- 3.1.12
- device server
- 3.1.13
- discard
- 3.1.14
- Exchange
- 3.1.15
- FCP device
- 3.1.16
- FCP Exchange
- 3.1.17
- FCP I/O operation
- 3.1.18
- FCP_Port
- 3.1.19
- fully qualified Exchange identifier
- FQXID
- 3.1.20
- image pair
- 3.1.21
- I_T nexus loss
- 3.1.22
- I_T nexus loss notification
- 3.1.23
- Information Unit
- IU
- 3.1.24
- initiator FCP_Port
- 3.1.25
- initiator port identifier
- 3.1.26
- initiator port name
- 3.1.27
- interconnect tenancy
- 3.1.28
- logical unit
- 3.1.29
- logical unit number
- LUN
- 3.1.30
- loop initialization primitive
- 3.1.31
- management logical unit
- 3.1.32
- Name_Identifier
- 3.1.33
- Name Server
- 3.1.34
- Node_Name
- 3.1.35
- NL_Port
- 3.1.36
- N_Port
- 3.1.37
- N_Port Login
- PLOGI
- 3.1.38
- N_Port_Name
- 3.1.39
- Nx_Port
- 3.1.40
- Originator
- 3.1.41
- Originator Exchange_ID
- OX_ID
- 3.1.42
- private loop
- 3.1.43
- public loop
- 3.1.44
- random buffer access
- 3.1.45
- read operation
- 3.1.46
- request byte count
- 3.1.47
- Responder
- 3.1.48
- Responder Exchange_ID
- RX_ID
- 3.1.49
- SCSI device
- 3.1.50
- SCSI I/O operation
- 3.1.51
- SCSI initiator device
- 3.1.52
- SCSI initiator port
- 3.1.53
- SCSI target device
- 3.1.54
- SCSI target port
- 3.1.55
- sense data
- 3.1.56
- Sequence
- 3.1.57
- Sequence_ID
- SEQ-ID
- 3.1.58
- Source_Identifier
- S_ID
- 3.1.59
- status
- 3.1.60
- target FCP_Port
- 3.1.61
- target port identifier
- 3.1.62
- target port name
- 3.1.63
- task attribute
- 3.1.64
- task management function
- 3.1.65
- task retry identifier
- 3.1.66
- unacknowledged class
- 3.1.67
- Worldwide_Name
- 3.1.68
- word
- 3.1.69
- write operation
- 3.2 Abbreviations
- 3.3 Keywords [Go to Page]
- 3.3.1
- invalid
- 3.3.2
- mandatory
- 3.3.3
- may
- 3.3.4
- may not
- 3.3.5
- obsolete
- 3.3.6
- optional
- 3.3.7
- reserved
- 3.3.8
- restricted
- 3.3.9
- shall
- 3.3.10
- should
- 3.4 Editorial conventions
- 4 General [Go to Page]
- 4.1 Structure and concepts
- 4.2 FCP I/O operations
- 4.3 Bidirectional and unidirectional commands and FCP_RSP IU format
- 4.4 Precise delivery of commands
- 4.5 Confirmed completion of FCP I/O operations
- 4.6 Retransmission of unsuccessfully transmitted IUs
- 4.7 Task retry identification
- 4.8 Discovery of FCP capabilities
- 4.9 Task management functions [Go to Page]
- 4.9.1 Task management functions overview
- 4.9.2 ABORT TASK task management function
- 4.9.3 QUERY TASK task management function
- 4.10 Clearing effects of task management, FCP, FC-FS-3, FC-LS-2, and FC-AL-2 actions
- 4.11 I_T nexus loss notification events
- 4.12 Transport Reset notification events
- 4.13 Port Login/Logout
- 4.14 Process Login and Process Logout
- 4.15 Link management
- 4.16 FCP addressing and Exchange identification
- 4.17 Use of Worldwide_Names
- 5 FC-FS-3 frame header [Go to Page]
- 5.1 FC-FS-3 frame header overview
- 5.2 FC-FS-3 frame header fields [Go to Page]
- 5.2.1 r_ctl field
- 5.2.2 d_id field
- 5.2.3 cs_ctl field
- 5.2.4 s_id field
- 5.2.5 type field
- 5.2.6 f_ctl field
- 5.2.7 seq_id field
- 5.2.8 df_ctl field
- 5.2.9 seq_cnt field
- 5.2.10 ox_id field
- 5.2.11 rx_id field
- 5.2.12 parameter field
- 6 FCP link service definitions [Go to Page]
- 6.1 Overview of link service requirements
- 6.2 Overview of Process Login and Process Logout
- 6.3 PRLI ELS [Go to Page]
- 6.3.1 Use of PRLI ELS by the Fibre Channel Protocol
- 6.3.2 New or repeated Process Login
- 6.3.3 PRLI ELS request FCP Service Parameter page format
- 6.3.4 PRLI ELS accept FCP Service Parameter page format
- 6.4 PRLO ELS
- 6.5 Read Exchange Concise (REC) ELS
- 7 FC-4 specific Name Server registration and objects [Go to Page]
- 7.1 Overview of FC-4 specific objects for the Fibre Channel Protocol
- 7.2 FC-4 TYPEs object
- 7.3 FC-4 Features object
- 8 FCP FC-4 Link Service (FCP_LS) definitions [Go to Page]
- 8.1 FCP_LS overview
- 8.2 Sequence Retransmission Request (SRR) FCP_LS request
- 8.3 FCP_LS Accept (FCP_ACC)
- 8.4 FCP_LS Reject (FCP_RJT)
- 9 FCP Information Unit (IU) usage and formats [Go to Page]
- 9.1 FCP Information Unit (IU) usage
- 9.2 FCP_CMND IU [Go to Page]
- 9.2.1 Overview and format of FCP_CMND IU
- 9.2.2 FCP_CMND IU field descriptions [Go to Page]
- 9.2.2.1 fcp_lun field
- 9.2.2.2 command reference number field
- 9.2.2.3 command priority field
- 9.2.2.4 task attribute field
- 9.2.2.5 task management flags field
- 9.2.2.6 additional fcp_cdb length field
- 9.2.2.7 rddata bit and wrdata bit
- 9.2.2.8 fcp_cdb field
- 9.2.2.9 additional_fcp_cdb field
- 9.2.2.10 fcp_dl field
- 9.2.2.11 fcp_bidirectional_read_dl field
- 9.3 FCP_XFER_RDY IU [Go to Page]
- 9.3.1 Overview and format of FCP_XFER_RDY IU
- 9.3.2 fcp_data_ro field
- 9.3.3 fcp_burst_len field
- 9.4 FCP_DATA IU [Go to Page]
- 9.4.1 FCP_DATA IU overview
- 9.4.2 FCP_DATA IUs for read and write operations
- 9.4.3 FCP_DATA IUs for bidirectional commands
- 9.4.4 FCP_DATA IU use of fill bytes
- 9.5 FCP_RSP IU [Go to Page]
- 9.5.1 Overview and format of FCP_RSP IU
- 9.5.2 status qualifier field
- 9.5.3 fcp_bidi_rsp bit
- 9.5.4 fcp_bidi_read_resid_under bit
- 9.5.5 fcp_bidi_read_resid_over bit
- 9.5.6 fcp_conf_req bit
- 9.5.7 fcp_resid_under bit
- 9.5.8 fcp_resid_over bit
- 9.5.9 fcp_sns_len_valid bit
- 9.5.10 fcp_rsp_len_valid bit
- 9.5.11 scsi status code field
- 9.5.12 fcp_resid field
- 9.5.13 fcp_bidirectional_read_resid field
- 9.5.14 fcp_sns_len field
- 9.5.15 fcp_rsp_len field
- 9.5.16 fcp_rsp_info field
- 9.5.17 fcp_sns_info field
- 9.6 FCP_CONF IU
- 10 SCSI mode parameters for the Fibre Channel Protocol [Go to Page]
- 10.1 Overview of mode pages for the Fibre Channel Protocol
- 10.2 Disconnect-Reconnect mode page [Go to Page]
- 10.2.1 Overview and format of Disconnect-Reconnect mode page for FCP
- 10.2.2 buffer full ratio field
- 10.2.3 buffer empty ratio field
- 10.2.4 bus inactivity limit field
- 10.2.5 disconnect time limit field
- 10.2.6 connect time limit field
- 10.2.7 maximum burst size field
- 10.2.8 emdp bit
- 10.2.9 faa bit, fab bit, and fac bit
- 10.2.10 first burst size field
- 10.3 Fibre Channel Logical Unit Control mode page
- 10.4 Fibre Channel Port Control mode page [Go to Page]
- 10.4.1 Overview and format of Fibre Channel Port Control mode page
- 10.4.2 Disable target originated loop initialization (dtoli) bit
- 10.4.3 Disable target initiated port enable (dtipe) bit
- 10.4.4 Allow login without loop initialization (alwli) bit
- 10.4.5 Require hard address (rha) bit
- 10.4.6 Disable loop master (dlm) bit
- 10.4.7 Disable discovery (ddis) bit
- 10.4.8 Prevent loop port bypass (plpb) bit
- 10.4.9 Disable target fabric discovery (dtfd) bit
- 10.4.10 rr_tov units field
- 10.4.11 sequence initiative resource recovery timeout value (rr_tovseq_init) field
- 11 Timers for FCP operation and recovery [Go to Page]
- 11.1 Summary of timers for the Fibre Channel Protocol
- 11.2 Error_Detect Timeout (E_D_TOV)
- 11.3 Resource Allocation Timeout (R_A_TOV)
- 11.4 Resource Recovery Timeout (RR_TOV)
- 11.5 Read Exchange Concise Timeout Value (REC_TOV)
- 11.6 Upper Level Protocol Timeout (ULP_TOV)
- 12 Link error detection and error recovery procedures [Go to Page]
- 12.1 Error detection and error recovery overview [Go to Page]
- 12.1.1 Exchange level
- 12.1.2 Sequence level
- 12.2 FCP error detection [Go to Page]
- 12.2.1 Overview of FCP-4 error detection
- 12.2.2 FCP-4 error detection using protocol errors for all classes of service
- 12.2.3 Error detection mechanisms for acknowledged classes of service
- 12.3 Exchange level recovery using ABTS-LS [Go to Page]
- 12.3.1 ABTS-LS overview
- 12.3.2 Initiator FCP_Port Exchange termination
- 12.3.3 Target FCP_Port response to Exchange termination
- 12.3.4 Additional error recovery by initiator FCP_Port
- 12.3.5 Additional error recovery by target FCP_Port
- 12.4 Sequence level error detection and recovery [Go to Page]
- 12.4.1 Using information from REC ELS to perform Sequence retransmission [Go to Page]
- 12.4.1.1 Polling Exchange state with REC ELS
- 12.4.1.2 Detection of errors while polling with REC ELS
- 12.4.1.3 FCP_CMND IU recovery
- 12.4.1.4 FCP_XFER_RDY IU recovery
- 12.4.1.5 FCP_RSP IU recovery
- 12.4.1.6 FCP_DATA IU recovery - write operations
- 12.4.1.7 FCP_DATA IU recovery - read operations
- 12.4.1.8 FCP_CONF IU recovery
- 12.4.2 Additional error recovery requirements [Go to Page]
- 12.4.2.1 Error indicated in ACK
- 12.4.2.2 Missing ACK
- 12.4.2.3 Distinguishing Exchange to be aborted
- 12.5 Second-level error recovery [Go to Page]
- 12.5.1 ABTS error recovery
- 12.5.2 REC ELS request error recovery
- 12.5.3 SRR FCP_LS request error recovery
- 12.6 Responses to FCP type frames before port login or process login
- Annex A (normative) SAM-5 mapping to FCP-4
- Annex B (informative) FCP examples [Go to Page]
- B.1 Examples of the use of FCP Information Units (IUs) [Go to Page]
- B.1.1 Overview of examples
- B.1.2 Read command
- B.1.3 Write command
- B.1.4 Command with no data transfer or with check condition
- B.1.5 Read command with multiple FCP_DATA IUs
- B.1.6 Write command with FCP_XFER_RDY disabled
- B.1.7 Bidirectional command with write before read
- B.1.8 Bidirectional command with read before write
- B.1.9 Bidirectional command with write first and write FCP_XFER_RDY disabled
- B.1.10 Bidirectional command with intermixed writes and reads
- B.1.11 Write command with confirmed completion
- B.1.12 Task management function
- B.1.13 Class 2 write command example, frame level
- B.1.14 Class 2 read command example, frame level
- Annex C (informative) Error detection and recovery examples
- Annex D (informative) FCP device discovery procedure [Go to Page]
- D.1 FCP Device Discovery Procedure [Go to Page]
- D.1.1 Initiator discovery of Fabric-attached target FCP_Ports
- D.1.2 Initiator discovery of loop-attached target FCP_Ports
- D.2 Fabric and device verification
- D.3 Logical unit verification
- Annex E (informative) FCP-4 examples of link service usage [Go to Page]
- E.1 Formats for recovery link services
- E.2 Abort Sequence (ABTS) request [Go to Page]
- E.2.1 Abort Sequence (ABTS) request fields
- E.2.2 Basic Accept (BA_ACC) frame to ABTS
- E.2.3 Basic Reject (BA_RJT) frame to ABTS
- E.3 Reinstate Recovery Qualifier (RRQ) ELS [Go to Page]
