ANSI INCITS325-1998 Information Technology - Serial Bus Protocol 2 (SBP-2)《信息技术.串行总线协议2(SBP-2)》.pdf

1、ANSI INCITS 325-1998 (R2003)(formerly ANSI NCITS 325-1998)for Information Technology Serial Bus Protocol 2 (SBP-2)Copyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright Americ

2、an National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSINCITS 325-1998American National Standardfor Information Technology Serial Bus Protocol 2 (SBP-2)SecretariatInformation Technology Industry Cou

3、ncilApproved November 20, 1998 American National Standards Institute, Inc.AbstractThis standard specifies a protocol for the transport of commands, data and status between devices con-nected by Serial Bus, a memory-mapped split-transaction bus defined by ANSI/IEEE 1394-1995, Ameri-can National Stand

4、ard for a High Performance Serial Bus.Copyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Approval of an American National Standard requires review by ANSI that therequirements for d

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6、ore thana simple majority, but not necessarily unanimity. Consensus requires that allviews and objections be considered, and that a concerted effort be madetowards their resolution.The use of American National Standards is completely voluntary; theirexistence does not in any respect preclude anyone,

7、 whether he has approvedthe standards or not, from manufacturing, marketing, purchasing, or usingproducts, processes, or procedures not conforming to the standards.The American National Standards Institute does not develop standards andwill in no circumstances give an interpretation of any American

8、NationalStandard. Moreover, no person shall have the right or authority to issue aninterpretation of an American National Standard in the name of the AmericanNational Standards Institute. Requests for interpretations should beaddressed to the secretariat or sponsor whose name appears on the titlepag

9、e of this standard.CAUTION NOTICE: This American National Standard may be revised orwithdrawn at any time. The procedures of the American National StandardsInstitute require that action be taken periodically to reaffirm, revise, orwithdraw this standard. Purchasers of American National Standards may

10、receive current information on all standards by calling or writing the AmericanNational Standards Institute.American National StandardPublished byAmerican National Standards Institute, Inc.11 West 42nd Street, New York, NY 10036Copyright 1999 by Information Technology Industry Council (ITI)All right

11、s reserved.No part of this publication may be reproduced in anyform, in an electronic retrieval system or otherwise,without prior written permission of ITI, 1250 Eye Street NW, Washington, DC 20005. Printed in the United States of AmericaCAUTION: The developers of this standard have requested that h

12、olders of patents that may be re-quired for the implementation of the standard disclose such patents to the publisher. However, nei-ther the developers nor the publisher have undertaken a patent search in order to identify which, ifany, patents may apply to this standard. As of the date of publicati

13、on of this standard, followingcalls for the identification of patents that may be required for the implementation of the standard,notice of one or more such claims has been received. By publication of this standard, no positionis taken with respect to the validity of this claim or of any rights in c

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15、patent search is con-ducted by the developer or publisher in respect to any standard it processes. No representation ismade or implied that this is the only license that may be required to avoid infringement in the use ofthis standard.Copyright American National Standards Institute Provided by IHS u

16、nder license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-iContentsPageForeword v1 Scope and purpose. 11.1 Scope 11.2 Purpose 12 Normative references . 22.1 Approved references 22.2 References under development 23 Definitions and notation 33.1 Definitio

17、ns. 33.1.1 Conformance 33.1.2 Glossary 33.1.3 Abbreviations 63.2 Notation 63.2.1 Numeric values . 63.2.2 Bit, byte and quadlet ordering. 63.2.3 Register specifications 73.2.4 State machines . 94 Model (informative). 114.1 Unit architecture . 114.2 Logical units 114.3 Requests and responses 114.4 Dat

18、a buffers 124.5 Target agents 144.6 Ordered and unordered execution 155 Data structures . 165.1 Operation request blocks (ORBs) 175.1.1 Dummy ORB. 185.1.2 Command block ORBs. 185.1.3 Management ORBs 205.2 Page tables. 275.2.1 Unrestricted page tables. 285.2.2 Normalized page tables 285.3 Status bloc

19、k 295.3.1 Request status 315.3.2 Unsolicited device status 336 Control and status registers 346.1 Core registers . 346.2 Serial Bus-dependent registers 346.3 MANAGEMENT_AGENT register. 356.4 Command block agent registers . 356.4.1 AGENT_STATE register. 366.4.2 AGENT_RESET register 376.4.3 ORB_POINTE

20、R register . 376.4.4 DOORBELL register . 386.4.5 UNSOLICITED_STATUS_ENABLE register 39Copyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-iiPage7 Configuration ROM. 407.1 Power reset

21、 initialization . 407.2 Bus information block . 417.3 Root directory . 427.3.1 Module_Vendor_ID entry 427.3.2 Node_Capabilities entry 427.3.3 Unit_Directory entry 427.4 Unit directory. 437.4.1 Unit_Spec_ID entry. 437.4.2 Unit_SW_Version entry 437.4.3 Command_Set_Spec_ID entry. 447.4.4 Command_Set en

22、try. 447.4.5 Command_Set_Revision entry. 447.4.6 Firmware_Revision entry 457.4.7 Management_Agent entry 457.4.8 Unit_Characteristics entry. 457.4.9 Reconnect_Timeout entry. 467.4.10Logical_Unit_Directory entry. 467.4.11Logical_Unit_Number entry 467.4.12Unit_Unique_ID entry . 477.5 Logical unit direc

23、tory. 477.5.1 Command_Set_Spec_ID entry. 487.5.2 Command_Set entry. 487.5.3 Command_Set_Revision entry. 487.5.4 Logical_Unit_Number entry 487.6 Unit unique ID leaf 488 Access 508.1 Access protocols. 508.2 Login. 508.3 Reconnection 518.4 Logout. 529 Command execution. 539.1 Requests and request lists

24、 . 539.1.1 Fetch agent initialization (informative) 539.1.2 Dynamic appends to request lists (informative) 549.1.3 Fetch agent use by the BIOS (informative). 559.1.4 Fetch agent state machine . 559.2 Data transfer. 589.3 Completion status. 589.4 Unsolicited status 5910 Task management 6010.1 Task se

25、ts 6010.2 Basic task management model. 6010.3 Error conditions. 6110.4 Task management requests . 6110.4.1Abort task 6110.4.2Abort task set 6210.4.3Logical unit reset. 6310.4.4Target reset 6310.5 Task management event matrix . 64Copyright American National Standards Institute Provided by IHS under l

26、icense with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-iiiPageTables1 Data transfer speeds. 202 Management request functions. 21F.1 SAM-2 Service responses. 83Figures1 Bit ordering within a byte. 72 Byte ordering within a quadlet. 73 Quadlet ordering withi

27、n an octlet. 74 CSR specification example . 85 State machine example. 106 Linked list of ORBs. 127 Directly addressed data buffer 138 Indirectly addressed data buffer (via page table) 139 Address pointer. 1610 ORB pointer 1611 ORB family tree. 1712 ORB format . 1713 Dummy ORB. 1814 Command block ORB

28、 . 1915 Management ORB 2116 Login ORB. 2217 Login response 2318 Query logins ORB . 2419 Query logins response format. 2420 Reconnect ORB 2521 Logout ORB 2622 Task management ORB 2723 Page table element (unrestricted page table) . 2824 Page table element (when page_size equals four). 2825 Status bloc

29、k format . 3026 TRANSPORT FAILURE format for sbp_status. 3227 MANAGEMENT_AGENT format. 3528 AGENT_STATE format. 3629 AGENT_RESET format. 3730 ORB_POINTER format . 38Copyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking perm

30、itted without license from IHS-,-,-ivPage31 DOORBELL format. 3932 UNSOLICITED_STATUS_ENABLE format 3933 Configuration ROM hierarchy . 4034 Bus information block format 4135 Module_Vendor_ID entry format. 4236 Node_Capabilities entry format 4237 Unit_Directory entry format. 4338 Unit_Spec_ID entry fo

31、rmat . 4339 Unit_SW_Version entry format . 4340 Command_Set_Spec_ID entry format 4441 Command_Set entry format 4442 Command_Set_Revision entry format 4443 Firmware_Revision entry format. 4544 Management_Agent entry format . 4545 Unit_Characteristics entry format . 4546 Reconnect_Timeout entry format

32、 . 4647 Logical_Unit_Directory entry format . 4648 Logical_Unit_Number entry format. 4649 Unit_Unique_ID entry format 4750 Unit unique ID leaf format. 4851 Fetch agent initialization with a dummy ORB . 5452 Fetch agent state machine . 56B.1 SCSI command block ORB 67B.2 SCSI control byte 67B.3 Status

33、 block format for SCSI sense data 68C.1 Set password ORB . 73D.1 Basic configuration ROM 75D.2 SCSI configuration ROM 77AnnexesA Minimum Serial Bus node capabilities 65B SCSI command and status encapsulation 67C Security extensions. 72D Sample configuration ROM. 75E Serial Bus transaction error reco

34、very . 79F SCSI Architecture Model conformance. 81Copyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-vForeword (This foreword is not part of American National Standard ANSI NCITS 32

35、5-1998.)This standard defines a transport protocol within the domain of Serial Bus, as de-scribed in ANSI/IEEE 1394-1995, that is designed to permit efficient, peer-to-peeroperation of input output devices (disks, tapes, printers, etc.) by upper-layer proto-cols such as operating systems or embedded

36、 applications. Vendors that wish to im-plement devices that connect to Serial Bus may follow the requirements of this andother normatively referenced standards to manufacture an SBP-2 compliant device.This standard was developed by T10 during 1996 and through early 1998. Althoughsome early SBP mock-

37、up devices were demonstrated in 1993, significant proof-of-concept, in the form of prototype implementations, has proceeded contemporane-ously with the development of this standard.This standard bears the name SBP-2 because there was an ancestral standard, Seri-al Bus Protocol (SBP), which has since

38、 been withdrawn by ANSI. SBP was extantduring most of the development of this standard, which was consequently calledSBP-2 to avoid confusion.There are six annexes in this standard. Annexes A, B and C are normative and partof this standard. Annexes D, E and F are informative and are not considered p

39、art ofthis standard.Requests for interpretation, suggestions for improvement and addenda, or defect re-ports are welcome. They should be sent to the NCITS Secretariat, Information Tech-nology Industry Council, 1250 Eye Street, NW, Suite 200, Washington, DC 20005-3922.This standard was processed and

40、approved for submittal to ANSI by National Com-mittee for Information Technology Standardization (NCITS). Committee approval ofthis standard does not necessarily imply that all committee members voted for ap-proval. At the time it approved this standard, NCITS had the following members:Karen Higginb

41、ottom, ChairDavid Michael, Vice-ChairMonica Vago, SecretaryOrganization Represented Name of RepresentativeAMP, Inc. John HillCharles Brill (Alt.)Apple Computer, Inc. David MichaelJerry Kellenbenz (Alt.)AT The protocol should enable the initiator to form an arbitrarily large set of tasks without cons

42、iderationof implementation limits in the target; The protocol should allow the initiator to dynamically add tasks to this set while the target is active inexecution of earlier tasks. The addition of new tasks should not interfere with the targets processingof tasks currently active; Although the pro

43、tocol should enable varying levels of features and performance in target implemen-tations, strong focus should be kept on a minimal set deemed adequate for entry-level environ-ments; Within the constraints posed by the preceding goal, the hardware and software design of the initiatorshould not be un

44、duly affected by variations in target capabilities; In order to promote the scalability of aggregate system performance, the protocol should distributethe DMA context from the initiator adapter to the target devices.Although SBP-2 has been designed for Serial Bus as currently specified by ANSI/IEEE

45、1394, the Techni-cal Committee anticipates that it will be appropriate for use with future extensions to Serial Bus as they arestandardized.Copyright American National Standards Institute Provided by IHS under license with ANSINot for ResaleNo reproduction or networking permitted without license fro

46、m IHS-,-,-ANSI NCITS 325-199822 Normative referencesThe standards named in this clause contain provisions which, through reference in this text, constituteprovisions of this American National Standard. At the time of publication, the editions indicated were valid.All standards are subject to revisio

47、n; parties to agreements based on this American National Standard areencouraged to investigate the possibility of applying the most recent editions of the standards indicatedbelow.Copies of the following documents can be obtained from ANSI:Approved ANSI standards;Approved and draft regional and inte

48、rnational standards (ISO, IEC, CEN/CENELEC and ITU-T); andApproved foreign standards (including BIS, JIS and DIN).For further information, contact the ANSI Customer Service Department by telephone at (212) 642-4900,by FAX at (212) 302-1286 or via the world wide web at http:/www.ansi.org.Additional c

49、ontact information for document availability is provided below as needed.2.1 Approved referencesANSI/IEEE 1394-1995, High Performance Serial BusANSI/ISO/IEC 9899-1990 (R1997), Programming Languages - CISO/IEC 13213:1994, Control and Status Register (CSR) Architecture for Microcomputer Buses1)2.2 References under developmentAt the time of publication, the following referenced standards were s