Receive Errors RDESC.ERRORS Layout, RXE IPE Tcpe RSV | Intel PCI-X

Receive and Transmit Description

Table 3-3. Receive Errors (RDESC.ERRORS) Layout

7

6

5

4

3

2

1

0

RXE

IPE

TCPE

RSV

CXEa

RSV

SEQ

RSVb

SE

RSVb

CE

a.82544GC/EI only.

b.82541xx, 82547GI/EI, and 82540EP/EM only.

	Receive
	Descriptor Error	Description
	bits

		RX Data Error
		Indicates that a data error occurred during the packet reception. A data error in TBIa
	RXE (bit 7)	mode (82544GC/EI)/internal SerDes (82546GB/EB and 82545GM/EM) refers to the
	RXE (bit 7)	reception of a /V/ code (see Section 8.2.1.3). In GMII or MII mode, the assertion of
		I_RX_ER during data reception indicates a data error. This bit is valid only when the
		EOP and DD bits are set; it is not set in descriptors unless RCTL.SBP (Store Bad
		Packets) control bit is set.

		IP Checksum Error
		When set, indicates that IP checksum error is detected in the received packet. Valid
		only when the IP checksum is performed on the receive packet as indicated via the
	IPE (bit 6)	IPCS bit in the RDESC.STATUS field.
		If receive IP checksum offloading is disabled (RXCSUM.IPOFL), the IPE bit is set to
		0b. It has no effect on the packet filtering mechanism.
		Reads as 0b.

		TCP/UDP Checksum Error
		When set, indicates that TCP/UDP checksum error is detected in the received
		packet.
		Valid only when the TCP/UDP checksum is performed on the receive packet as
	TCPE (bit 5)	indicated via TCPCS bit in RDESC.STATUS field.
		If receive TCP/UDP checksum offloading is disabled (RXCSUM.TUOFL), the TCPE
		bit is set to 0b.
		It has no effect on the packet filtering mechanism.
		Reads as 0b.

		Carrier Extension Error
		When set, indicates a packet was received in which the carrier extension error was
	CXE	signaled across the GMII interface. A carrier extension error is signaled by the PHY
	RSV (bit 4)	by the encoding of 1Fh on the receive data inputs while I_RX_ER is asserted.
		Valid only while working in 1000 Mb/s half-duplex mode of operation.
		This bit is reserved for all Ethernet controllers except the 82544GC/EI.

	RSV (Bit 3)	Reserved
	RSV (Bit 3)	Reads as 0b.
		Reads as 0b.

Software Developer’s Manual

23

Image 37

Intel PCI-X, Intel Gigabit Ethernet Controllers manual Receive Errors RDESC.ERRORS Layout, RXE IPE Tcpe RSV, Rsv Seq, Cxe

Contents

82540EP/EM, 82541xx, 82544GC/EI, 82545GM/EM, 82546GB/EB, Software Developer’s Manual Initial Public Release Date Version Comments Software Developer’s Manual Contents TCP Segmentation Use of Multiple Data Descriptors Software Developer’s Manual Vii Power Management 129 Introduction to Power Management 10.1.3 203 13.4.25 13.7.10 Appendix 82540EP/EM and 82545GM/EM Differences Xiv Overview Scope PCI Features Ethernet Controller FeaturesCSA Features 82547GI/EI Only Network Side Features Host Offloading Features Additional Performance Features Technology Features Additional Ethernet Controller Features Related Documents ConventionsMemory Alignment Terminology Register and Bit References Introduction Architectural Overview PHY External ArchitectureLAN a LAN B ECHO, Next Fext Eeprom FlashAGC, A/D 1 PCI/PCI-X Core Interface Microarchitecture DMA Engine and Data Fifo 2 82547GI/EI CSA Interface 5 MII/GMII/TBI/Internal SerDes Interface Block 4 10/100/1000 Mb/s Receive and Transmit MAC Blocks Eeprom Interface 6 10/100/1000 Ethernet Transceiver PHY Flash Memory Interface DMA AddressingExample 2-1. Byte Ordering Little Endian Data Ordering Intel Architecture Byte Ordering Ethernet AddressingIA Byte # LSB MSB Interrupts Buffer and Descriptor Structure Hardware Acceleration CapabilityChecksum Offloading TCP Segmentation Architectural Overview Packet Reception IntroductionPacket Address Filtering Receive Descriptor Format Receive Data StorageReceive Descriptor Rdesc Layout Receive Status RDESC.STATUS Layout Receive Descriptor Status FieldPIF Ipcs Tcpcs RSV Ixsm EOP Receive Receive Descriptor Errors Field RXE IPE Tcpe RSV Receive Errors RDESC.ERRORS LayoutRSV SEQ CXE Special Descriptor Field Layout Receive Descriptor Special FieldPRI CFI Vlan PRI Receive Descriptor Fetching Algorithm Receive Descriptor Fetching Receive Descriptor Queue Structure Receive Descriptor Write-BackReceive Descriptor Packing Null Descriptor Padding Receive Descriptor Ring Structure Receive Interrupt Delay Timer / Packet Timer Rdtr Receive Timer InterruptReceive Interrupts Packet Delay Timer Operation State Diagram Receive Interrupt Absolute Delay Timer Radv Small Receive Packet Detect Receive Packet Checksum Offloading 8 82544GC/EI Receive InterruptsReceive Descriptor Minimum Threshold ICR.RXDMT Receiver Fifo Overrun Packet Type HW IP Checksum HW TCP/UDP Checksum Calculation Supported Receive Checksum Capabilities GC/EI Supported Receive Checksum Capabilities MAC Address FilterPacket Type HW IP Checksum HW TCP/UDP Checksum Packet Type HW IP Checksum SNAP/VLAN Filter Packet Transmission9.3 IPv4 Filter 9.4 IPv6 Filter Transmit Descriptors Transmit Data Storage Legacy Transmit Descriptor Format Transmit Descriptor Tdesc Layout Legacy ModeTransmit Descriptor Tdesc Layout Transmit Descriptor Legacy Descriptions CMD Transmit Descriptor Description LegacySTA CSS 10. Transmit Command TDESC.CMD Layout Transmit Descriptor Command Field FormatIDE VLE Dext RSV Ifcs EOP 11. Transmit Status Layout Transmit Descriptor Status Field Format 12. Special Field TDESC.SPECIAL Layout Transmit Descriptor Special Field Format 5 TCP/IP Context Transmit Descriptor Format 13. Transmit Descriptor Tdesc Layout Type = 0000b 6 TCP/IP Context Descriptor Layout Transmit Description Descriptor Offload 14. Transmit Descriptor Tdesc Layout Transmit Description 6.1 TCP/UDP Offload Transmit Descriptor Command FieldTucmd Dtyp IDE RSV Dext TSE TCP 15. Command Field TDESC.TUCMD Layout82544GC/EI only 6.2 TCP/UDP Offload Transmit Descriptor Status Field 7 TCP/IP Data Descriptor Format16. Transmit Status Layout Popts RSV STA Dcmd Dtyp Dtalen 17. Transmit Descriptor Tdesc Layout Type = 0001bPopts 18. Command Field TDESC.DCMD Layout 7.1 TCP/IP Data Descriptor Command FieldIDE VLE Dext TSE Ifcs EOP 19. Transmit Status Layout 7.2 TCP/IP Data Descriptor Status FieldReserved 7.4 TCP/IP Data Descriptor Special Field 7.3 TCP/IP Data Descriptor Option Field20. Packet Options Field TDESC.POPTS Layout RSV Txsm Ixsm 21. Special Field TDESC.SPECIAL Layout Transmit Descriptor Ring Structure Transmit Descriptor Ring Structure Transmit Descriptor Write-back Transmit Descriptor Fetching Transmit Interrupts Delayed Transmit Interrupts Transmission Process Assumptions Packet Format TCP Segmentation PerformanceTCP Segmentation Data Fetch Control TCP/UDP Data FCS 3936 TCP Segmentation Indication TCP Partial Pseudo-Header Checksum TCP Segmentation Use of Multiple Data Descriptors Version IP Hdr IP and TCP/UDP HeadersOptions Fragment Offset Low Type of service Version IP Hdr Length FragmentOffset High Header Checksum TCP Header Destination Port Sequence NumberLength Checksum Urgent Pointer Options Byte1 Byte0 Destination Port Byte3 Byte2 Byte1 Byte0 Source Port Destination Port Length Checksum Transmit Checksum Offloading with TCP Segmentation 17. UDP Pseudo Header Diagram for IPv4 9 IP/TCP/UDP Header Updating 19. Overall Data Flow 9.2 TCP/IP/UDP Header for the Subsequent Frames 9.1 TCP/IP/UDP Header for the First Frame 9.3 TCP/IP/UDP Header for the Last Frame IP/TCP/UDP Transmit Checksum Offloading Ipcss Receive and Transmit Description Mandatory PCI Registers PCI ConfigurationAddress Description PCI Specification Update for the latest stepping information Addr Base Address Registers Field Bits Read Initial Description Write Value All base address registers have the following fields Offset Space Expansion ROM Base Address Address Next Pointer Capabilities Linked List Bits Initial Value Description PCI definition for more details 82547GI/EI Status Register Layout PCI-X Capability ID PCI-X Configuration RegistersNext Capability Byte Offset Bits Read Initial PCI-X CommandWrite Value Maximum Memory Read Byte Count. This register sets USC SCD PCI-X StatusBits Read Intial Description Write Value Reserved and Undefined Addresses Command Register as follows Message Signaled Interrupt Configuration Registers Message Signaled Interrupts1MSI Capability ID Bits Read Initial Description Write Value 05h Message Control 3.1.4 Message Address Commands3.1.5 Message Upper Address 3.1.6 PCI Commands Abr PCI-X Commands Accepted PCI/PCI-X Command as a TargetTransaction Target PCI Commands PCI-X Commands Transaction Cause PCI Commands PCI-X Commands Memory Write Operations PCI/PCI-X Command Usage MWI Bursts Master Write Command Usage Algorithm Memory Read Operations PCI-X Command UsageMW Bursts Rules for Memory Read Operations Outstanding Memory Read Cache Line Information1 Interrupt Assignment 82547GI/EI Only LAN DisableTarget Transaction Termination CardBus Application 82541PI/GI/EI Only General Overview Eeprom Interface Component Identification Component Identification Via Programming InterfaceStepping Vendor ID Device ID Description Eeprom Device and Interface Signature and CRC Fields Software Access Command Line Parameters Eeupdate Utility Ethernet Controller Address Map Eeprom Address Map1Word Used Bit Image For the 82541xx and 82547GI 82545GM 82540EP LAN a82541xx and 82547GI/EI only 82546GB/EB only 82545GM 82541xx ASF 82540EP/EM GC/EI and 82541ER Eeprom Address Map Word Description Default HW AccessAddress Hi Byte Low Byte Software Compatibility Word Word 03h Ethernet Address Words 00h-02hSoftware Compatibility Word Word 03h Bit Name Description Eeprom Image Version Word 05h SerDes Configuration Word 04hCompatibility Fields Word 05h 07h PBA Number Word 08h, 09h Initialization Control Word 1 Word 0Ah Initialization Control Word 1 Word 0Ah Subsystem Vendor ID Word 0Ch Subsystem ID Word 0Bh Vendor ID Word 0Eh Device ID Word 0Dh, 11h1Initialization Control Word 2 Word 0Fh Initialization Control Word 2 Word 0Fh 82541PI/GI Only Software Defined Pins Control Word 10h1, 20h Common Power Word 12hPHY Register Address Data Words 10h, 11h, and 13h 1Eh OEM Reserved Words Words 10h, 11h, 13h 1Fh Software Defined Pins Control Word 10h, 20h CSA Port Configuration 2 Word 21h CSA Port Configuration 2 Word 21hBit Description Default 21 D3 Power Word 22h low byte 20 D0 Power Word 22h high byteCircuit Control Word 21h Reserved Words 23h 2Eh Management Control Word 13h1, 23h2 10. Initial Management Control Register Settings82541PI/GI/EI and 82547GI/EI Only 11. SMBus Slave Address SMBus Slave Address Word 14h1 low byte, 24h low byte 12. Initialization Control Initialization Control 3 Word 14h1 high byte, 24h high byte82546GB/EB uses INTB# For Address 24h High Byte / LAN a Boot Agent Main Setup Options Word 30h LED Configuration Defaults Word 2Fh227 IPv4 Address Words 15h 16h1 and 25h 26h 28 IPv6 Address words 17h 1Eh1 and 27h 2Eh 15. Boot Agent Main Setup Options DBS Boot Agent Configuration Customization Options Word 31hBBS SIG 16. Boot Agent Configuration Customization Options Word 31hMode DFU 17. Boot Agent Configuration Customization Options Word 32h Boot Agent Configuration Customization Options Word 32h IBA Capabilities Word 33h IBA Secondary Port Configuration Words 34h-35h18. IBA Capabilities 20. WOL Mode and Functionality Word 20h 19. WOL Mode and Functionality Word 0AhChecksum Word Calculation Word 3Fh Eeprom Images 21. Flash Memory Manufacturers Parallel Flash MemoryManufacturer Number 124 Flash Interface Operation Flash Control and Accesses Write Accesses Read Accesses Flash Buffer Write Cycle 128 Assumptions Introduction to Power Management D3cold support Power States 1.2 D0u State Dr State 1.3 D0a D0 active Timing1.4 D3 Diagram # Power Up Off to Dr to D0u to D0a Transition from D0a to D3 and Back Without PCI Reset Transition From D0a to D3 and Back Without PCI Reset RST# Transition From D0a to D3 and Back with PCI Reset PCI Reset Sequence PCI Reset Without Transition to D3 Bits Default Description PCI Power Management RegistersCapability ID Byte Offset = 0 RO Next Item Pointer Byte Offset = 1 RO Reserved Power Management Capabilities PMC 2 Bytes Offset = 2 ROEeprom Software Developer’s Manual 139 3.6 Data Register Pmcsrbse Bridge Support ExtensionsByte Offset = 6 RO Byte Offset = 7 RO Wakeup Advanced Power Management Wakeup Acpi Power Management Wakeup Pre-Defined Filters Wakeup PacketsDirected Exact Packet Directed Multicast Packet 3.1.3 Broadcast3.1.4 Magic Packet*1 Offset Field Value Action Comment Offset Field Value Action Comment Bytes + S a 3.1.5 ARP/IPv4 Request Packet1+ D + S a ARP Offset # of bytes Field Value Action Comment Directed IPv4 Packet1 Directed IPv6 Packet1 Flexible Filter IPX Diagnostic Responder Request Packet Example1+ S + D + S 3.4 IPv6 Neighbor Discovery Filter1 Directed IPX Packet Example CRC Wakeup Packet Storage 152 Link Interfaces Overview Ethernet Interface 1.2 8B10B Encoding/Decoding Internal SerDes Interface/TBI Mode- 1Gb/s1 Code Groups and Ordered Sets Gmii 1 Gb/sCode Group and Ordered Set Usage Code OrderedSet Duplex Operation Internal Interface1MII 10/100 Mb/s Half Duplex Full Duplex Packet Bursting Carrier Extension 1000 Mb/s Only Auto-Negotiation and Link Setup2 Auto-Negotiation and Link Setup1 Link Speed Link Configuration in Internal Serdes/TBI Mode1Auto-Negotiation Hardware Auto-Negotiation TXCW.txConfigWord Bit Description Software Auto-Negotiation Forcing Link Internal GMII/MII Mode Forcing Speed Using Auto-Speed Detection ASD Duplex Automatic Detection of Link Speed using SPD-INDMII Management Registers Comments Regarding Forcing Link Internal Serdes Mode1 Hardware Enabled Internal SerDes Mode1 Control Bit ResolutionInternal Serdes1 Mode Software Enabled Control Bit Effect on Control Bits GMII/MII Mode PHY Speed Indication Internal PHY Mode Control Bit ResolutionInternal Serdes Mode1 Auto-Negotiation Skipped GMII/MII Mode Force Speed GMII/MII Mode Auto-Speed Detection Internal Serdes Mode Loss of Signal/Link Status IndicationInternal PHY Mode GMII/MII Mode Force Link Adaptive IFS1 10/100 Mb/s Specific Performance Enhancements MAC Control Frames & Reception of Flow Control Packets Flow Control10. Flow Control Registers Register Name Description 3x MAC Control Frame Format Transmission of Pause Frames Discard Pause Frames and Pass MAC Control Frames External Control of Flow Control Operation1 Software Initiated Pause Frame Transmission 1 802.1q Tagged Frames 802.1q Vlan Packet FormatVlan Packet Format Comparison Packet #Octets 802.1q Vlan Packet Filtering Transmitting and Receiving 802.1q PacketsAdding 802.1q Tags on Transmits Stripping 802.1q Tags on Receives VFE Packet Reception Decision Table 178 Selecting an LED Output Source Configurable LED Outputs1 Blink Control Polarity Inversion Blink Control 182 Auto-Negotiation PHY Functionality and Features Next Page Exchanges Register Update Status 11.2 MDI/MDI-X Crossover copper onlyPin 1000BASE-T 11.2.2 10/100 Downshift 82540EP/EM Only Polarity Correction copper only Cable Length Detection copper only PHY Power Management copper onlyLink Down Energy Detect copper only 11.4.4 D3 Link-Up, Speed-Management Disabled copper only 11.4.3 D3 Link-Up, Speed-Management Enabled copper only11.4.2 D3 State, No Link Required copper only Initialization Mdio Control Mode Overview of Link Establishment Determining Link State False Link Configuration ResultForced Operation Determining Duplex State Via Parallel Detection Auto Negotiation Link CriteriaParallel Detection 11.7.1 1000BASE-T Link Enhancements Using SmartSpeed11.7.3 10BASE-T SmartSpeed Pause And Asymmetric Pause Settings Low Power OperationAsmdir Settings Pause Setting Management Data Interface Smart Power-Down Powerdown via the PHY Register11.11 1000 Mbps Operation DSP ECHO, Next 4DPAM5 Transmit Fifo Transmit Functions Low-Pass Filter Spectral ShaperLine Driver Transmit/Receive Flow Receive Functions 11.13 10 Mbps Operation 11.12 100 Mbps OperationDescrambler Viterbi Decoder/Decision Feedback Equalizer DFE PHY Line Length Indication 202 Introduction1 Features of Each MAC12.2.1 PCI/PCI-X interface 204 12.2.3 SDP, LED, INT# output MAC Configuration Register SpaceIO BAR Eeprom Map Shared EepromEeprom Arbitration Shared Flash Flash Access Contention Pin sampled LAN device controlled Enable/Disable Values Sampled on Reset Multi-Function Advertisement Power ReportingInterrupt Use Summary EnabledInterrupt Line Used INTA# Register Conventions Register Descriptions Memory-Mapped Access to Flash Memory-Mapped Access to Internal Registers and MemoriesMemory-Mapped Access to Expansion ROM Memory and I/O Address Decoding Iodata IoaddrOffset Abbreviation Name Size Ioaddr AD C/BE#30 Bits Iodata Register Configurations Category Offset Abbreviation Name Ethernet Controller Register Summary82544GC/EI 82547GI/EI only Ipat 82544GC Fcruc XofftxcPRC64 Gprc Abbreviation Name Register Category82544GC/EI , 82541xx , or 82547GI/EI To the 82544GC/EI , 82541xx , or 82547GI PCI-X Register Access Split1 Device Control Register Main Register DescriptionsCtrl 00000h R/W Field Bits Initial Description Value Ctrl Register Bit Description Ilos SLUSpeed SDP0DATA FrcdplxSDP1DATA ADVD3WUC Field Bits Initial Description Device Status Register BEM = 0 64-bit mode Little-EndianStatus 00008h R Little-Endian Data Ordering Txoff Status Register Bit DescriptionTbimode PCI66 AsdvPcixmode Pcixspd Eecd 00010h R/W EEPROM/Flash Control & Data RegisterEecd Register Bit Description 82544GC/EI Only Eegnt EereqEepres Eesize Eerd 00014h RW Eeprom Read Register1Eeprom Read Register Bit Description Done Start Eeprom Read Register Bit Description 82541xx and 82547GI/EI Flash Access FLA Flash Access1FLA 0001Ch R/W Ctrlext 00018h, R/W Extended Device Control Register10. Ctrlext Register Bit Description 23 16 SDP2IODIR SDP6IODIRSDP7IODIR Asdchk 11. GPI to SDP Bit Mappings Vreg PowerDown Linkmode 12 GC/EI Ctrlext Register Bit Description SwdpinshiSwdpiohi CTRL.RST 13 GC/EI GPI to SDP Bit Mapping Mdic 00020h R/W MDI Control Register RSV PHY REG Data 14. MDI Control Register Bit DescriptionRegadd Phyadd Register Mode Description 15. PHY Register Bit Mode DefinitionsPHY Registers MSB Field Bits Description Mode HW Rst SW Rst 242 LSB Enaxc RO,L Software Developer’s Manual 245 246 For the 82541xx and 82547GI/EI Pause 82544GC/EI only 82541xx 82541xx 82547GI/EI 82541xx and 82547GI/EI only ANEG3 82544GC/EI OnlyANEG2 RF1 Software Developer’s Manual 251 23. Link Partner Ability Register Base Page Bit Description1 24. PHY Link Page Ability Bit Description1 82541xx and 82547GI/EI Only10BASE-T 100BASE-TX 1b 82541xx Software Developer’s Manual 255 Bits Field Description Mode HW Rst SW Rst ANEG0 MasterMASTER/SLAVE ANEG1 258 Software Developer’s Manual 259 DIS NLP SFD Preen Software Developer’s Manual 263 264 Software Developer’s Manual 265 266 82541/GI/ER and 82547GI B1 82541EI/82547GI B0 stepping 268 HCD NOK Software Developer’s Manual 271 272 Field Bits Description Mode HW Rst Ledactled SPEED1000LED SPEED100LED 276 Software Developer’s Manual 277 51. MDI Register 30 Operations Documented MDI Register 30 Operations1To Perform Operation MDI Read/Write Sequence Flow Control Address High Flow Control Address LowFcal 00028h R/W Fcah 0002Ch R/W Vlan Ether Type Flow Control TypeFCT 00030h R/W VET 00038h R/W Fcttv 00170h R/W Flow Control Transmit Timer Value56. VET Register Bit Description 57. Fcttv Register Bit Description Txcw 00178h R/W Transmit Configuration Word Register158. Txcw Register Bit Description Rxcw 00180h R Receive Configuration Word Register1 59. Rxcw Register Bit Description Ledctl 00E00h RW LED Control1ANC LED1 ACTIVITY# LED0 LINKUP# 60. LED Control Bit Description1 Mode Encodings for LED Outputs1 Mode Pneumonic State / Event Indicated 61. Mode Encodings for LED Outputs PBA 01000H R/W Packet Buffer Allocation62. PBA Register Bit Description Field Bits Initial Value Description ICR 000C0H R Interrupt Cause Read Register63. ICR Register Bit Description Mdac RXT0Rxcfg GPISDP6 ITR 000C4h R/W Interrupt Throttling Register1Interval ICS 000C8h W Interrupt Cause Set Register64. ICS Register Bit Description IMS 000D0h R/W Interrupt Mask Set/Read Register65. IMS Register Bit Description To the 82544GC/EI IMC 000D8h W Interrupt Mask Clear Register 66. IMC Register Bit Description Rctl 00100h R/W Receive Control Register67. Rctl Register Bit Description SBP LPE MPELBM Rdmts Bsize BAMVFE Cfien Bsex PmcfSecrc Flow Control Receive Threshold Low XON Enable 82544GC/EI , 82541xx , and 82547GI/EI onlyFcrtl 02160h R/W 68. Fcrtl Register Bit Description Fcrth 02168h R/W Flow Control Receive Threshold High69. Fcrth Register Bit Description Receive Descriptor Base Address High Receive Descriptor Base Address LowRdbal 02800hR/W Rdbah 02804h R/W Receive Descriptor Head Receive Descriptor LengthRdlen 02808h R/W RDH 02810h R/W Receive Descriptor Tail Receive Delay Timer RegisterRDT 02818hR/W Rdtr 02820h R/W Radv 0282Ch RW Receive Interrupt Absolute Delay Timer1 Transmit Control Register Receive Small Packet Detect Interrupt1Rsrpd 02C00h R/W Tctl 00400hR/W Cold 76. Tctl Register Bit DescriptionPSP TCTL.COLD Tipg 00410R/W Transmit IPG RegisterRtlc Nrtu IPGR2 IPGR1 Ipgt 77. Tipg Register Bit Description Aifs 00458R/W Adaptive IFS Throttle AITIPGR2 Tdbal 03800h R/W Transmit Descriptor Base Address Low78. Aifs Register Bit Description 79. Tdbal Register Bit Description Transmit Descriptor Length Transmit Descriptor Base Address HighTdbah 03804h R/W Tdlen 03808h R/W TDH 03810h R/W Transmit Descriptor Head82. TDH Register Bit Description Transmit Descriptor Tail Transmit Interrupt Delay ValueTDT 03818h R/W Tidv 03820h R/W Transmit Descriptor Control TX DMA Control 82544GC/EI onlyTxdmac 03000h R/W Txdctl 03828h R/W Lwthresh RSV1 Gran RSV Wthresh Hthresh Pthresh 86. Txdctl Register Bit Description Tadv 0382Ch RW Transmit Absolute Interrupt Delay Value1Gran Lwthresh Tspbp Tsmt TCP Segmentation Pad And Minimum Threshold Tspmt 03830h RWTspbp Software Developer’s Manual 319 Rxdctl 02828h R/W Receive Descriptor Control87. Rxdctl Register Bit Description Wthresh RSV Hthresh Pthresh Rxcsum 05000h R/W Receive Checksum Control88. Rxcsum Register Bit Description 3111 Tuofld IpofldIPV6OFL Multicast Table Array Filter RegistersMTA1270 05200h-053FCh R/W 89. MTA Register Bit Description Destination Address Receive Address High Receive Address LowRAL 05400h + 8*n R/W RAH 05404h + 8∗n R/W VFTA1270 05600h 057FCh R/W Vlan Filter Table Array191. RAH Register Bit Description RAH Wakeup Control Register Wakeup RegistersWUC 05800h R/W 92. VFTA1270 Bit Description Wufc 05808h R/W Wakeup Filter Control RegisterApmpme SPM WUS 05810h R Wakeup Status Register 330 Ipav 5838h R/W IP Address Valid IP4AT 05840h 05858h R/W2 13.6.5 IPv4 AddressAddress Field Dword # Address Bits Initial Value Description IP6AT 05880h 0588Ch R/W 13.6.6 IPv6 AddressIPV6ADDR0 Dword # Address Bits Initial Value Description Wakeup Packet Memory 128 Bytes Wakeup Packet LengthFlexible Filter Length Table LEN0 Flexible Filter Mask Table Ffmt 09000h 093F8h R/WLEN1 LEN2 Flexible Filter Value Table Statistics RegistersFfvt 09800h 09BF8h R/W Alignment Error Count CRC Error CountCrcerrs 04000h R Algnerrc 04004h R RX Error Count Symbol Error CountSymerrs 04008h R Rxerrc 0400Ch R Single Collision Count Missed Packets CountMPC 04010h R SCC 04014h R Multiple Collision Count Excessive Collisions CountEcol 04018h R MCC 0401Ch R Collision Count Late Collisions CountLatecol 04020h R Colc 04028h R Transmit with No CRS Defer CountDC 04030h R Tncrs 04034h R Carrier Extension Error Count Sequence Error CountSEC 04038h R Cexterr 0403Ch R XON Received Count Receive Length Error CountRlec 04040h R Xonrxc 04048h R Xoff Received Count XON Transmitted CountXoff Transmitted Count Packets Received 64 Bytes Count FC Received Unsupported CountFcruc 04058h R PRC64 0405Ch R Packets Received 128-255 Bytes Count Packets Received 65-127 Bytes CountPRC127 04060h R PRC255 04064h R Packets Received 512-1023 Bytes Count Packets Received 256-511 Bytes CountPRC511 04068h R PRC1023 0406Ch R Good Packets Received Count Packets Received 1024 to Max Bytes CountPRC1522 04070h R Gprc 04074h R Multicast Packets Received Count Broadcast Packets Received CountBprc 04078h R Mprc 0407Ch R Good Octets Received Count Good Packets Transmitted CountGptc 04080h R Gorcl 04088h R/GORCH 0408Ch R Receive No Buffers Count Good Octets Transmitted CountGotcl 04090h R/ Gotch 04094 R Rnbc 040A0h R Receive Fragment Count Receive Undersize CountRUC 040A4h R RFC 040A8h R Receive Jabber Count Receive Oversize CountROC 040ACh R RJC 040B0h R Mgtprc 040B4h R Management Packets Received Count1129. RJC Register Bit Description Management Pkts Transmitted Count1 Management Packets Dropped Count1Total Octets Received Totl 040C8h R/W / Toth 040CCh R Total Octets Transmitted130. Torl and Torh Register Bit Descriptions 131. Totl and Toth Register Bit Descriptions Total Packets Transmitted Total Packets ReceivedTPR 040D0h R TPT 040D4h R Packets Transmitted 65-127 Bytes Count Packets Transmitted 64 Bytes CountPTC64 040D8h R PTC127 040DCh R Packets Transmitted 256-511 Bytes Count Packets Transmitted 128-255 Bytes CountPTC255 040E0h R PTC511 040E4h R Packets Transmitted 1024 Bytes or Greater Count Packets Transmitted 512-1023 Bytes CountPTC1023 040E8h R PTC1522 040ECh R Broadcast Packets Transmitted Count Multicast Packets Transmitted CountMptc 040F0h R Bptc 040F4h R TCP Segmentation Context Transmit Fail Count TCP Segmentation Context Transmitted CountTsctc 040F8h R Tsctfc 040FCh R Receive Data Fifo Head Register Diagnostics RegistersReceive Data Fifo Tail Register Rdfh 02410h R/W Receive Data Fifo Tail Saved Register Receive Data Fifo Head Saved RegisterRdfhs 02420h R/W Rdfts 02428h R/W Transmit Data Fifo Head Register Receive Data Fifo Packet CountRdfpc 02430h R/W Tdfh 03410h R/W Transmit Data Fifo Head Saved Register Transmit Data Fifo Tail RegisterTdft 03418h R/W Tdfhs 03420h R/W Transmit Data Fifo Packet Count Transmit Data Fifo Tail Saved RegisterTdfts 03428h R/W Tdfpc 03430h R/W PBM 10000h 1FFFCh R/W Packet Buffer Memory151. Tdfpc Register Bit Description 152. PBM Bit Description 370 General Configuration Power Up State Receive Initialization General Initialization and Reset Operation Transmit Initialization Ipgt IPGR1 IPGR2 Fiber Copper 82544GC/EI Signal Ball Name and Function Signal Descriptions Carrier Sense Signal InterfaceReceive Data Receive Clock Signal Functions GMII/MII Features not SupportedSignal Function Pin Gmii 1000 Mbps Operations MII 10/100 Mbps Differences Signal Functions Not Supported Avoiding Gmii Test Modes MAC ConfigurationDirect PHY Indications to MAC CTRL.FD Link Setup CTRL.RFCE PHY Initialization 10/100/1000 Mb/s Copper Media Lanpwrgood Reset Operation 382 Software Developer’s Manual 383 Initialization of Statistics Fifo State DiagnosticsFifo Data Loopback Internal Loopback Testability SAMPLE/PRELOAD Instruction Extest InstructionIdcode Instruction Bypass Instruction 388 Appendix Changes From 82544EI/82544GC New Features Table A-1. Register Changes Register ChangesRegister Offset EEC Serial Flash Interface 82540EP/EM Differences Single-Port Functionality No TBI/Internal SerDes Interface4 32-Bit PCI Support