Information technology - Small computer system interface (SCSI) - Part 224: Fibre Channel Protocol, fourth version (FCP-4)

ISO/IEC 14776-224:2019(E) defines the Small computer system interface (SCSI) Fibre Channel Protocol (FCP). This standard defines how the Fibre Channel services and the defined Information Units (IUs) are used to perform the services defined by the SCSI Architecture Model - 5 (SAM-5). This fourth version includes additions and clarifications to the third version (ISO/IEC 14776-223:2008), removes information that is now contained in other standards, and describes additional error recovery capabilities for the Fibre Channel Protocol.

General Information

Status
Published
Publication Date
21-Oct-2019
Current Stage
PPUB - Publication issued
Start Date
29-Oct-2019
Completion Date
22-Oct-2019
Ref Project

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ISO/IEC 14776-224:2019 - Information technology - Small computer system interface (SCSI) - Part 224: Fibre Channel Protocol, fourth version (FCP-4)
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ISO/IEC 14776-224
Edition 1.0 2019-10
INTERNATIONAL
STANDARD
Information technology – Small computer system interface (SCSI) –
Part 224: Fibre Channel Protocol for SCSI, fourth version (FCP-4)

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ISO/IEC 14776-224
Edition 1.0 2019-10
INTERNATIONAL
STANDARD
Information technology – Small computer system interface (SCSI) –

Part 224: Fibre Channel Protocol for SCSI, fourth version (FCP-4)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 35.200 ISBN 978-2-8322-7520-7

Contents
FOREWORD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2 Normative references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3 Terms, definitions, abbreviations and conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1 Terms and definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.3 Keywords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.4 Editorial conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.1 Structure and concepts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.2 FCP I/O operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.3 Bidirectional and unidirectional commands and FCP_RSP IU format . . . . . . . . . . . . . . . . . 26
4.4 Precise delivery of commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.5 Confirmed completion of FCP I/O operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.6 Retransmission of unsuccessfully transmitted IUs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.7 Task retry identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.8 Discovery of FCP capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.9 Task management functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.9.1 Task management functions overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.9.2 ABORT TASK task management function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.9.3 QUERY TASK task management function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.10 Clearing effects of task management, FCP, FC-FS-3, FC-LS-2, and FC-AL-2 actions . . . 32
4.11 I_T nexus loss notification events. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.12 Transport Reset notification events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.13 Port Login/Logout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.14 Process Login and Process Logout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.15 Link management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.16 FCP addressing and Exchange identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.17 Use of Worldwide_Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5 FC-FS-3 frame header. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.1 FC-FS-3 frame header overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.2 FC-FS-3 frame header fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.2.1 R_CTL field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.2.2 D_ID field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.2.3 CS_CTL field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.2.4 S_ID field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.2.5 TYPE field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.2.6 F_CTL field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.2.7 SEQ_ID field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5.2.8 DF_CTL field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5.2.9 SEQ_CNT field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5.2.10 OX_ID field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5.2.11 RX_ID field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5.2.12 PARAMETER field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6 FCP link service definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.1 Overview of link service requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.2 Overview of Process Login and Process Logout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.3 PRLI ELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.3.1 Use of PRLI ELS by the Fibre Channel Protocol. . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.3.2 New or repeated Process Login . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

- 3 - ISO/IEC 14776-224:2019 © ISO/IEC 2019
6.3.3 PRLI ELS request FCP Service Parameter page format. . . . . . . . . . . . . . . . . . . . . 41
6.3.4 PRLI ELS accept FCP Service Parameter page format . . . . . . . . . . . . . . . . . . . . . 44
6.4 PRLO ELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
6.5 Read Exchange Concise (REC) ELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7 FC-4 specific Name Server registration and objects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
7.1 Overview of FC-4 specific objects for the Fibre Channel Protocol . . . . . . . . . . . . . . . . . . . . 47
7.2 FC-4 TYPEs object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
7.3 FC-4 Features object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
8 FCP FC-4 Link Service (FCP_LS) definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8.1 FCP_LS overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8.2 Sequence Retransmission Request (SRR) FCP_LS request. . . . . . . . . . . . . . . . . . . . . . . . 49
8.3 FCP_LS Accept (FCP_ACC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8.4 FCP_LS Reject (FCP_RJT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
9 FCP Information Unit (IU) usage and formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
9.1 FCP Information Unit (IU) usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
9.2 FCP_CMND IU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
9.2.1 Overview and format of FCP_CMND IU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
9.2.2 FCP_CMND IU field descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
9.2.2.1 FCP_LUN field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
9.2.2.2 COMMAND REFERENCE NUMBER field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
9.2.2.3 COMMAND PRIORITY field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
9.2.2.4 TASK ATTRIBUTE field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
9.2.2.5 TASK MANAGEMENT FLAGS FIELD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
9.2.2.6 ADDITIONAL FCP_CDB LENGTH field. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
9.2.2.7 RDDATA bit and WRDATA bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
9.2.2.8 FCP_CDB field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
9.2.2.9 ADDITIONAL_FCP_CDB field. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
9.2.2.10 FCP_DL field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
9.2.2.11 FCP_BIDIRECTIONAL_READ_DL field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
9.3 FCP_XFER_RDY IU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
9.3.1 Overview and format of FCP_XFER_RDY IU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
9.3.2 FCP_DATA_RO field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
9.3.3 FCP_BURST_LEN field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
9.4 FCP_DATA IU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
9.4.1 FCP_DATA IU overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
9.4.2 FCP_DATA IUs for read and write operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9.4.3 FCP_DATA IUs for bidirectional commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
9.4.4 FCP_DATA IU use of fill bytes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
9.5 FCP_RSP IU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
9.5.1 Overview and format of FCP_RSP IU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
9.5.2 STATUS QUALIFIER field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
...

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