I 1111111111111111 11111 1111111111 111111111111111 IIIII IIIII IIIIII IIII IIII IIII
`US007076568B2
`
`c12) United States Patent
`Philbrick et al.
`
`(IO) Patent No.:
`(45) Date of Patent:
`
`US 7,076,568 B2
`*Jul. 11, 2006
`
`(54) DATA COMMUNICATION APPARATUS FOR
`COMPUTER INTELLIGENT NETWORK
`INTERFACE CARD WHICH TRANSFERS
`DATA BETWEEN A NETWORK AND A
`STORAGE DEVICE ACCORDING
`DESIGNATED UNIFORM DATAGRAM
`PROTOCOL SOCKET
`
`(75)
`
`Inventors: Clive M. Philbrick, San Jose, CA
`(US); Laurence B. Boucher, Saratoga,
`CA (US); Daryl D. Starr, Milpitas, CA
`(US)
`
`(73) Assignee: Alacritech, Inc., San Jose, CA (US)
`
`( *) Notice:
`
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 804 days.
`
`This patent is subject to a terminal dis(cid:173)
`claimer.
`
`(21) Appl. No.: 09/802,551
`
`(22) Filed:
`
`Mar. 9, 2001
`
`(65)
`
`Prior Publication Data
`
`US 2001/0037406 Al
`
`Nov. 1, 2001
`
`Related U.S. Application Data
`
`(60) Provisional application No. 60/098,296, filed on Aug.
`27, 1998, provisional application No. 60/061,809,
`filed on Oct. 14, 1997.
`
`(51)
`
`Int. Cl.
`G06F 15116
`
`(2006.01)
`
`(52) U.S. Cl. ....................................... 709/250; 709/230
`(58) Field of Classification Search ................ 709/203,
`709/212, 217,230,232,250; 710/5, 22,
`710/23, 26, 27; 370/474
`See application file for complete search history.
`
`(56)
`
`References Cited
`
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`(Continued)
`
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`
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`
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`(Continued)
`
`OTHER PUBLICATIONS
`
`Stevens, "TCP/IP Illustrated, vol. 1: The protocols," New
`York, 1994, pp. 143-168.*
`
`(Continued)
`
`Primary Examiner-Jungwon Chang
`(74) Attorney, Agent, or Firm-Mark Lauer; Silicon Edge
`Law Group LLP
`
`(57)
`
`ABSTRACT
`
`An interface device is connected to a host by an I/O bus and
`provides hardware and processing mechanisms for acceler(cid:173)
`ating data transfers between a network and a storage unit,
`while controlling the data transfers by the host. The interface
`device includes hardware circuitry for processing network
`packet headers, and can use a dedicated fast-path for data
`transfer between the network and the storage unit, the
`fast-path set up by the host. The host CPU and protocol stack
`avoids protocol processing for data transfer over the fast(cid:173)
`path, freeing host bus bandwidth, and the data need not cross
`the I/O bus, freeing I/O bus bandwidth. Realtime audio and
`video communication can also be provided when the inter(cid:173)
`face device is coupled by an audio/video interface to appro(cid:173)
`priate communication devices, such as microphone, a
`speaker, a camera and/or a display.
`
`20 Claims, 24 Drawing Sheets
`
`HOST MEMORY .ll
`
`I MEMORY l ~:E~Y~T~~
`
`:
`I PROTOCOL
`U.
`I
`I
`I ~li_G!_21:~
`: STACKll
`~ 1-cAcHEl ~
`I DRIVERl2. I I MGR2..6_
`I I DRIVERfil_
`I
`
`HOSTl.!l.
`
`Petitioners Microsoft Corporation and HP Inc. - Ex. 1020, p. 1
`
`

`

`US 7,076,568 B2
`Page 2
`
`U.S. PATENT DOCUMENTS
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`
`Petitioners Microsoft Corporation and HP Inc. - Ex. 1020, p. 2
`
`

`

`US 7,076,568 B2
`Page 3
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`
`Petitioners Microsoft Corporation and HP Inc. - Ex. 1020, p. 3
`
`

`

`US 7,076,568 B2
`Page 4
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`
`* cited by examiner
`
`Petitioners Microsoft Corporation and HP Inc. - Ex. 1020, p. 4
`
`

`

`U.S. Patent
`
`Jul. 11, 2006
`
`Sheet 1 of 24
`
`US 7,076,568 B2
`
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`
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`
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`-
`-
`-
`I -HOST FILE l
`I
`I CACHE 24
`I
`
`)
`35
`
`HOST 20
`
`CPU 1Q_
`
`BRIDGE
`42
`I L--------------------------------------------------- ---------------------------
`40'-...---.._
`
`HOST
`STORAGE
`UNIT 66
`
`I
`
`___,r-. 61
`
`HOST I/0
`CTRL 64
`
`1- -
`- .....
`60 , ✓ ---1
`I
`I
`L _ I - - --
`1--[J[ gJ
`58'..,.---1 [
`L _ I - -
`-- ------------------------------------------------------- -1-------
`INIC STORAGE
`UNIT 70
`
`---------------------------------------------------- -----------------------------------------------
`BRIDGE
`50
`
`DMA
`68
`
`INIC 1/0
`CTRL 72
`
`PROCESSOR
`44
`
`I
`
`)
`48
`
`SEQUENCERS 52 1 - - -
`
`INIC MEMORY 46
`r - - - - - - - -
`
`I
`
`_ _ _ _ _ _ _ __,J
`
`lcCBi [FRAME BUFFERS 77 I v75
`I CACHE I
`. - - - - - - - -
`~ 74_1
`IINIC FILE CACHE £.Q.I
`
`_ _ _ _ _ _ _ __J
`
`INIC 22
`
`~--------------------------------
`
`LAN/WAN li
`
`INTERNET ll_
`
`FIG. 1
`
`Petitioners Microsoft Corporation and HP Inc. - Ex. 1020, p. 5
`
`

`

`U.S. Patent
`
`Jul. 11, 2006
`
`Sheet 2 of 24
`
`US 7,076,568 B2
`
`r---------------------------------------------------------------------------------•-----•--------~
`HOST 20
`.----------,-- CPU 30 -~ f - - - - - - - ,
`•
`
`,,
`
`,-- - - -
`
`,
`
`,.
`1-- - - -
`1FILE SYSTEM!
`I
`I
`23
`- - - __ I
`
`j
`
`: PROTOCOL :
`Ls~~~~s_ 1
`
`j~ h
`
`HOST FILE I
`HOST
`MEMORY I CACHE 24
`I
`-
`I
`33
`- - - __ I
`-
`
`'l
`
`L-------------- --
`
`~ 81
`------------------------------ ----------------------------- ----------••-••
`, '
`HOST STORAGE UNIT
`66
`
`._,-.. 91
`
`INIC 22
`
`,,
`PROCESSOR
`
`-
`
`-
`
`-
`
`-
`
`,,
`
`_ I CCB CACHE!
`INIC
`'--------I
`MEMORY
`74
`- - -=-- - 1
`46
`1 -
`,-- - -
`I
`~~~~-
`I FRAME
`I
`~--4-4--~
`)
`INIC FILE
`I BUFFERS t=:=j CACHE 80
`I
`90
`!' ) '~ _ ---=- I
`1~
`I
`I
`77
`I
`, _____ ,
`96
`I
`I
`I
`I
`I
`I
`i r - - -~
`I
`I
`I
`I
`_______________ J
`I
`__ .,,,,...._ 9 8
`
`,
`SEQUENCERS
`'------:::a5 ~2 _
`____.'
`~ -
`
`l
`
`\
`I
`88
`
`L-------------
`
`...r-- 85
`
`LAN/WAN ll
`
`INIC STORAGE UNIT
`70
`
`FIG. 2
`
`Petitioners Microsoft Corporation and HP Inc. - Ex. 1020, p. 6
`
`

`

`U.S. Patent
`
`Jul. 11, 2006
`
`Sheet 3 of 24
`
`US 7,076,568 B2
`
`RECEIVE PACKET FROM NETWORK BY INIC
`
`100
`
`VALIDATE PACKET, SUMMARIZE HEADERS
`
`102
`
`STORE PACKET AND SUMMARY
`IN BUFFERS
`
`104
`
`108
`
`NO
`
`SEND PACKET TO
`STACK FOR SLOW(cid:173)
`PATH PROCESSING
`
`112
`
`SEND PACKET TO
`>-----.i STACK FOR SLOW(cid:173)
`p ATH PROCESSING
`
`FLUSH CCB AND
`PACKET TO STACK
`FOR SLOW-PATH
`PROCESSING
`
`CREATE CCB FOR
`MESSAGE
`
`115
`
`106
`
`118
`
`DETERMINE
`DESTINATION IN
`FILE CACHE,
`STORE LIST OF
`DESTINATION
`ADDRESSES WITH
`CCB IN INIC
`
`122
`
`125
`
`YES
`
`SEND DATA TO
`DESTINA TIO~
`VIA FAST-PATH
`
`FIG. 3
`
`Petitioners Microsoft Corporation and HP Inc. - Ex. 1020, p. 7
`
`

`

`U.S. Patent
`
`Jul. 11, 2006
`
`Sheet 4 of 24
`
`US 7,076,568 B2
`
`RECEIVE FILE REQUEST FROM NETWORK, PROCESS REQUEST
`WITH STACK, DIRECT TO FILE SYSTEM
`
`200
`LOCATE REQUESTED FILE ON HOST FILE CACHE, INIC FILE
`CACHE, HOST STORAGE UNIT OR INIC STORAGE UNIT
`
`204
`
`READ FILE BLOCKS
`TO HOST FILE CACHE
`
`202
`
`212
`
`READ FILE BLOCKS
`TO INIC FILE CACHE
`
`CREATE NETWORK
`FRAMES FROM FILE
`BLOCKS IN HOST BY
`CPU RUNNING STACK
`
`206
`
`220
`
`210
`
`YES
`
`NO
`
`218
`
`CREA TE HEADERS BY
`INIC FROM CCB, DMA
`DATA TO INIC VIA CCB,
`PREPEND HEADERS TO
`DATA TO CREATE
`NETWORK FRAMES
`
`NO
`
`CREATE HEADERS
`BY CPU RUNNING
`STACK, INSTRUCT
`INIC TO ASSEMBLE
`FRAMES FROM
`HEADERS AND FILE
`BLOCKS IN INIC
`
`YES
`
`225
`
`214
`
`DMA
`FRAMES TO
`INIC
`
`CREA TE HEADERS
`BY INIC FROM CCB,
`PREPEND HEADERS
`TO DATA TO CREATE
`NETWORK FRAMES
`
`208
`
`SEND FRAMES ONTO NETWORK
`
`FIG. 4
`
`Petitioners Microsoft Corporation and HP Inc. - Ex. 1020, p. 8
`
`

`

`U.S. Patent
`
`Jul. 11, 2006
`
`Sheet 5 of 24
`
`US 7,076,568 B2
`
`FIRST
`NETWORK
`li
`
`FIRST INIC
`STORAGE
`UNIT 6-6_
`
`NTH
`NETWORK
`313
`
`NTH INIC
`STORAGE
`UNIT 315
`
`INIC 400
`
`FIRST
`INIC 22
`
`NTH
`INIC 310
`
`HOST
`20
`
`HOST
`STORAGE
`UNIT 66
`
`I
`
`---- 40
`
`SECOND
`INIC 303
`
`FIG. 5
`
`450
`)
`
`SECOND C~IC
`STORAGE
`UN1T 308
`
`SECOND
`NETWORK
`305
`
`rSAN 418
`
`FIRST
`ETHER-SCSI
`ADAPTER
`452
`
`SECOND
`ETHER-SCSI
`ADAPTER
`454
`
`THIRD
`ETHER-SCSI
`ADAPTER
`456
`
`458 ...._,..---.
`
`459 ...._,..---.
`
`460 ___...
`
`FIRST
`STORAGE
`UNIT 462
`
`SECOND
`STORAGE
`UNIT 464
`
`THIRD
`STORAGE
`UNIT 466
`
`FIG. 7
`
`Petitioners Microsoft Corporation and HP Inc. - Ex. 1020, p. 9
`
`

`

`U.S. Patent
`
`Jul. 11, 2006
`
`Sheet 6 of 24
`
`US 7,076,568 B2
`
`HOST
`ME~fORY
`ll
`
`PROTOCOL
`STACK 18._
`
`METADATA
`CACHE 26
`
`HOST FILE
`CACHE 24
`
`I
`s
`CPU 30 ! 35 BRIDGE
`42
`
`I
`
`HOST 20
`
`HOST
`STORAGE
`UNIT 66
`
`i------- 6 2
`HOST I/0 I
`! CTRL 64 !
`
`40'-------
`
`BRIDGE
`406
`
`PROCESSOR 408
`
`SEQUENCERS 412
`
`404 s
`
`INIC MEMORY 410
`
`lFRAME BUFFERS 430 !
`
`lINIC FILE CACHE 4331
`
`-oagg-
`422--✓-:cBc;-- -:
`
`4 ?4,...,--.I
`I
`-
`
`I
`I
`
`INIC 400
`
`-- ,__ -- -- --
`
`FIRST LA~
`414
`
`SECOND LAN
`416
`
`FIRST SAN
`418
`
`SECOND SAN
`420
`
`FIG. 6
`
`Petitioners Microsoft Corporation and HP Inc. - Ex. 1020, p. 10
`
`

`

`U.S. Patent
`
`Jul. 11, 2006
`
`Sheet 7 of 24
`
`US 7,076,568 B2
`
`PROCESSOR 480
`
`FIRST
`ETHER-SCSI
`ADAPTER
`452
`
`477
`\
`
`l
`ADAPTER MEMORY 482
`
`jFRAME BUFFERS 4841
`
`SCSI
`CTRL 488
`
`I
`
`FILE CACHE 486
`
`!
`
`SEQUENCERS 475
`
`MAC 472
`
`PHY 470
`
`'
`
`450--
`
`INIC 400
`
`f..-.,,--4 5 8
`FIRST
`STORAGE
`UNIT 462
`
`FIG. 8
`
`FIRST LAN
`414
`
`HOST
`20
`
`SECOND LAN
`416
`
`FIRST
`INIC 400
`
`FIRST SAN
`418
`
`SECOND SAN
`420
`
`-------40
`
`FIG. 9
`
`HOST
`STORAGE
`UNIT 66
`
`I
`
`NTH
`INIC 490
`
`NTH SAN
`492
`
`NTH LAN
`494
`
`Petitioners Microsoft Corporation and HP Inc. - Ex. 1020, p. 11
`
`

`

`U.S. Patent
`
`Jul. 11, 2006
`
`Sheet 8 of 24
`
`US 7,076,568 B2
`
`60
`MEDIA ACCESS
`CONTROLLER~
`
`,,
`ASSEMBLY r---, 500
`REGISTER
`
`...
`FLY BY
`• .----~SEQUENCER
`
`--~
`
`1 w
`
`MULTIPLEXER r--....,, 505
`
`( 508
`
`1~
`
`)
`
`SRAM
`
`SRAM
`CONTROL
`
`.....
`~
`
`••
`
`,,
`PACKET
`CONTROL
`SEQUENCER
`
`DRAM CONTROL
`
`(__ 518
`
`,.
`
`DR AM ~ 5 12
`
`QUEUE
`520 ------ MAN AGER
`
`FIG. 10
`
`Petitioners Microsoft Corporation and HP Inc. - Ex. 1020, p. 12
`
`

`

`U.S. Patent
`
`Jul. 11, 2006
`
`Sheet 9 of 24
`
`US 7,076,568 B2
`
`PACKET
`510-----., CONTROL
`SEQUENCER
`
`- - - -~ ASSEMBLY L..-r" SOO
`REGISTER
`
`502
`
`,.
`MAC
`~540
`SEQUENCER ...
`
`,...-,__ ____ __,
`
`542
`NETWORK f - -
`14 - - - - - - - - - -1
`SEQUENCER -
`
`,.
`TRANSPORT r---- 546
`14 - - - - - - - - - -1
`SEQUENCER
`~
`
`1 •
`
`SESSION
`SEQUENCER
`
`r--- 548
`
`,,
`
`,,
`
`MVL TIPLEXOR
`
`FIG. 11
`
`Petitioners Microsoft Corporation and HP Inc. - Ex. 1020, p. 13
`
`

`

`U.S. Patent
`
`Jul. 11, 2006
`
`Sheet 10 of 24
`
`US 7,076,568 B2
`
`570
`
`568
`
`566
`
`564
`
`562
`
`UPPER LAYER
`
`UPPER LAYER
`INTERFACE
`
`TRANSPORT
`
`38
`
`NETWORK
`
`DATA LINK
`
`560
`
`INIC DEVICE DRIVER
`
`FIG. 12
`
`38~
`
`TDI USERS
`--------;------------I
`TDI FILTER DRIVER
`572
`& UPPER LA YER INTERFACE
`..------.--------
`586
`TCP
`
`596
`
`ATCP
`
`575
`
`383
`
`590
`
`594
`
`IP
`
`IP
`
`548
`
`580
`
`592
`MAC
`582
`MAC
`--------+-----...1..-...J__----+-------
`598
`NDIS
`
`570
`
`INJC DEVICE DRIVER
`
`FIG. 13
`
`Petitioners Microsoft Corporation and HP Inc. - Ex. 1020, p. 14
`
`

`

`°" 00 = N
`"'°" UI
`'-"--...l = --...l
`d r.,;_
`
`0 ....
`....
`....
`.....
`rJJ =(cid:173)
`
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`
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`N
`
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`
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`....
`2'
`
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`0
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`
`~ = ~
`
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`~
`~
`•
`00
`
`e •
`
`I
`640
`
`STORAGE UNIT
`
`NETWORK
`
`(
`
`644
`
`652
`(
`
`FIG. 14
`
`650
`(
`
`(
`
`604
`
`~~~~~-~,
`
`I
`:
`I
`I
`
`INIC 622
`
`639
`
`L __
`I
`:
`I
`:
`I
`I
`
`L _______ J _____ _,
`I I
`I
`• •
`
`INIC 606
`
`I
`
`642
`UNIT
`
`NASSTORAGE
`
`~638
`
`634
`
`STORAGE UNIT
`
`ATTACHED
`
`SERVER
`
`INETBIOS 630
`I SMB 632
`
`SERVER600
`
`7
`
`MAC-621
`
`IP.616
`
`TCP@}
`
`ATCP@s.
`
`I l
`
`MAC608
`
`646
`
`648
`
`~618
`
`I
`
`TCP ill f I ~620
`ATCP612 i.-
`
`NETBIOS 614
`
`SMB 616
`
`CLIENT602
`
`I
`I
`I
`I
`I
`I
`I
`I
`I
`I
`I
`
`I --------------,
`
`Petitioners Microsoft Corporation and HP Inc. - Ex. 1020, p. 15
`
`

`

`00 = N
`
`-....l = -....l
`d r.,;_
`
`0--,
`tit
`0--,
`
`0 ....
`('D a ....
`rJJ =(cid:173)
`
`N
`
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`N
`
`O'I
`0
`0
`N
`
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`~ = :-....
`
`~ = ~
`
`~
`~
`~
`•
`00
`
`e •
`
`672
`
`DISPLAY
`
`I
`
`666
`
`INTERFACE
`AUDIO/VIDEO
`
`SPEAKER
`
`638~ I 668
`
`670
`
`PHONE
`MICRO(cid:173)
`
`UNIT634
`STORAGE
`ATTACHED
`
`SERVER
`
`I
`
`i---------, I
`I
`I
`t-----~ I
`:
`.---------, :
`:
`SERVER 600
`--,
`
`APP657
`
`-
`
`-
`
`I
`I
`I
`I
`:
`I
`I
`'
`)~----
`
`l
`
`UDP654
`
`AUDP@
`
`'-+--.-----......., J
`l
`t---t-------1 I
`,
`I
`r-+--=-::------1 I
`r
`I
`
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`
`-
`
`IP 626
`
`646
`
`618
`
`I
`
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`
`620
`
`I
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`I <--....---........--.------' I
`:
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`I
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`I ,.....,_ _ _,__,__ __ ___, I
`I
`:
`I
`I
`1
`I
`
`INIC 622
`
`639
`
`CAMERA
`
`674
`
`644
`
`652
`
`[ UNIT 640
`~STORAGE
`NETWORK
`
`(, (
`
`FIG. 15
`
`7 650
`
`(
`
`604
`
`APP_66_3
`
`I
`I
`--~------------,
`
`CLIENT 602
`
`-
`
`I 1---------'
`I
`I
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`I
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`:
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`I
`
`I
`I
`I
`I
`I
`I
`:
`I
`I
`
`L _____________ ..,
`I .____.--~-----' I
`I
`I
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`1
`I
`I
`I
`I ,---__ ._____... _ __._
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`I
`I
`I
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`1 MAC608
`r
`I
`I
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`I I ,____ ___ -----4--,
`l UDP660
`
`INIC 606
`
`-
`
`684
`
`CAMERA
`
`682
`
`DISPLAY
`
`l
`
`677
`
`INTERFACE
`AUDIONIDEO
`
`678
`
`SPEAKER
`
`680
`
`-r--
`
`PHONE
`MICRO(cid:173)
`
`Petitioners Microsoft Corporation and HP Inc. - Ex. 1020, p. 16
`
`

`

`U.S. Patent
`
`Jul. 11, 2006
`
`Sheet 13 of 24
`
`US 7,076,568 B2
`
`22~
`
`r-----
`
`702
`
`704
`
`700
`\
`I
`I
`
`PHY-B
`
`706
`
`708
`
`716
`
`718
`
`MAC-A
`
`MAC-C
`
`MAC-D
`
`722
`
`724
`
`726
`
`728
`
`XMT &
`RCV-A
`
`XMT &
`RCV-B
`
`XMT &
`RCV-C
`
`XMT &
`RCV-D
`
`I
`I
`I
`I
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`I
`MEMORY
`1
`I
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`I
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`I
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`I
`1------J
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`
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`
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`
`:
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`I
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`
`784
`
`782
`
`756
`
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`
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`
`I
`I
`I
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`I
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`I
`I
`I
`' - - - - - - - - - - - - - - - - - - - - - - - - __________________ J
`757
`FIG. 16
`
`755
`
`732
`
`734
`
`REG FILE
`WCS
`ROM
`
`781
`
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`
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`
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`
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`
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`
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`
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`
`I
`I
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`:
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`I
`I
`I
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`786
`:
`L ______________ J
`I
`I
`
`Petitioners Microsoft Corporation and HP Inc. - Ex. 1020, p. 17
`
`

`

`U.S. Patent
`
`Jul. 11, 2006
`
`Sheet 14 of 24
`
`US 7,076,568 B2
`
`CLOCK
`
`-- ______ /_ _____ L ______ L _____ /_ _____ L ___
`,
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`
`1J
`
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`Petitioners Microsoft Corporation and HP Inc. - Ex. 1020, p. 18
`
`

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`Petitioners Microsoft Corporation and HP Inc. - Ex. 1020, p. 19
`
`

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`~~---~-~---------
`' \
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`
`Petitioners Microsoft