RX Cppi Mode Explanation | Texas Instruments TMS320C645x specification

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SRIO Functional Description

Figure 20. RX CPPI Mode Explanation

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In addition, multiple messages can be interleaved at the receive port due to ordering within a connected switch’s output queue. This can occur when using a single or multiple priorities. The RX CPPI block must handle simultaneous interleaved multi-segment messages. This implies that state information (write pointers and srcID) must be maintained on each simultaneous message to properly store the segments in memory. The number of simultaneous transactions supported directly impacts the number of states to be stored, and the size of the buffer descriptor memory outside the peripheral. With this in mind, the peripheral’s supported buffer descriptor SRAM is parameterizable. A minimum size of 1.25KB is recommended, which will allow up to 64 buffer descriptors to be stored at any given time for one core. These buffer descriptors can be configured to support any combination of single and multi-segment messages. For example, if the application only handles single-segment messages, all 64 buffers can be allotted to that queue. Note that a given RX queue can contain packets of all priorities which have been directed from any of the receive ports.

A CPU may wish to stop receiving messages and reclaim buffers belonging to a specific queue. This is called queue teardown. The CPU initiates a RX queue teardown by writing to the RX Queue Teardown command register.

SPRU976 –March 2006

Serial RapidIO (SRIO)

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Texas Instruments TMS320C645x manual RX Cppi Mode Explanation

Contents

Users Guide Submit Documentation Feedback Contents Errrstevnticrr Base Device ID CSR Baseid List of Figures Load/Store Module Interrupt Condition Routing Registers 150 Port Error Rate Threshold CSR n SP n Errthresh List of Tables LSUn Control Register 0 LSUnREG0 Field Descriptions Base Device ID CSR Baseid Field Descriptions Read This First RapidIO Architectural Hierarchy General RapidIO System Overview 3 1x/4x LP-Serial RapidIO Interconnect Architecture Features Supported in Srio RapidIO Feature Support in Srio RapidIO Documents and Links Features Not SupportedStandards External Devices Requirements Peripheral Data Flow Overview Operation Sequence Srio Packets Example Packet Streaming Write Operation Sequence 4x RapidIO Packet Data Stream Streaming-Write Class Control Symbols Ftype Ttype Packet Type Srio Packet Ftype/TtypePacket Type Pin Description Srio PinsBlock Diagram Functional Operation Srio Conceptual Block Diagram Bit Name Value Description Serdes and its ConfigurationsEnabling the PLL Bits of Serdescfg nCNTL Register 0x120 0x12c Rate Bit Effects Bits of Serdescfg nCNTL Register 0x120 0x12cLine Rate versus PLL Output Clock Frequency Bits of Serdescfgrx nCNTL Registers Frequency Range versus MPYEnabling the Receiver Bit Field Value Description 1514 Disabled. Loss of signal detection disabledBits of SERDESCFGRXnCNTL Registers CFGRX2219 Low Freq Gain EQ BitsEnabling the Transmitter Bits of Serdescfgtx nCNTL Registers DE Bits Bits of Serdescfgtx nCNTL RegistersSwing Bits DirectIO Serdes Configuration Example RapidIO Packet Header Field Control/Command Register Field Mapping BSY Control/Command Register RapidIO Packet Header FieldStatus Fields Status Field Function LSU Registers Timing Detailed Data Path Description Example Burst Nwriter Write Transactions TX Operation Read Transactions RX Operation Segmentation Message Passing Reset and Power Down State Cppi RX Scheme for RapidIO Queue Mapping Table Address Offset 0x0800 0x08FC Bit Name Description Queue Mapping Register Rxumapl n RX Buffer Descriptor Fields Field Description RX Buffer Descriptor Field Descriptions Field Description RX Buffer Descriptor Field Descriptions RX Cppi Mode Explanation Cppi Boundary Diagram TX Buffer Descriptor Field Definitions TX Buffer Descriptor Fields Uses this bit to reclaim buffers Ssize TXQUEUECNTL2- Address Offset 0x7E8 Name Bit Access Reset Value DescriptionTXQUEUECNTL0- Address Offset 0x7E0 TXQUEUECNTL1- Address Offset 0x7E4 TXQueueMap10 2316 0x0A Detailed Data Path Description TX Operation Message Passing Software RequirementsRX Operation RX Buffer Descriptor Initialization ExampleQueue Mapping NDP TX Buffer Descriptor Start Message Passing Maintenance Doorbell Operation Doorbell Detailed Description Congestion Control Name Bit Transmit Source Flow Control Masks Endianness Configuration Bus Example DMA Example Reset BLK8ENSTA BLK7ENSTA Reset SummaryEnable and Enable Status Registers BLK0EN Enable and Enable Status Bit Field DescriptionsEnstat Gblen BLK2ENSTAT BLK1ENBLK1ENSTAT BLK2EN Peren Soft Free Software Shutdown DetailsEmulation BLK8ENSTAT Peren Emulation Control SignalsEnabling the Srio Peripherals Set Device ID Registers 11.2 PLL, Ports, Device ID and Data Rate InitializationsPeripheral Initializations Read register to check portx1-4 OK bit Assert the Peren bit to enable logical layer data flow Device Wakeup Bootload CapabilityConfiguration Bootload Data Movement ERR MSG REQ General Description CPU Interrupts Interrupt Condition Control Registers Interrupt Source Configuration Options Where ICS0 Doorbell1, bit 0, through ICS15 Doorbell1, bit Interrupt Conditions LSU Interrupt Condition Clear Registers Iccr Address Offset ICC2 ICC1 ICC0 ICS11 ICS10 ICS9 ICS8ICS2 ICS1 ICS0 ICC11 ICC10 ICC9 ICC8 DOORBELL0ICRR2 Address Offset Interrupt Condition Routing Options LSUICRR3 Address Offset 0x02EC LSUICRR1 Address Offset 0x02E4LSUICRR2 Address Offset 0x02E8 ICR2 ICR1 ICR0 Interrupt Status Decode RegistersERRRSTEVNTICRR2 Address Offset 0x02F4 ERRRSTEVNTICRR3 Address Offset 0x02F8 Sharing of Isdr Bits ISDR3 ISDR2 ISDR1 ISDR9 ISDR8 ISDR7 ISDR6 ISDR5 ISDR4 ISDR0 Interrupt GenerationInterrupt Pacing INTDSTnRATECNTL Interrupt Rate Control Register Interrupt Handling Interrupt Conditions Offset Acronym Register Description IntroductionSerial Rapid IO Srio Registers Offset Acronym Register Description Serial Rapid IO Srio Registers RR3 LSUICRR3Errrstevntic RR2 LSU3REG1 QUEUE4TXDMAC QUEUE1TXDMACQUEUE2TXDMAC QUEUE3TXDMAC QUEUE12RXDMA Rxqueuetear TxcppiflowmaSKS6 SKS7 RXUMAPH19 RXUMAPL18RXUMAPH18 RXUMAPL19 Srcop AsblyidAsblyinfo Pefeat SP0ERRRATE SP0ERRATTRCAPTDBG0 SP0ERRCAPTDB Spipdiscovery TimerSP3ERRRATE SP3ERRTHRESH Class REV Peripheral Identification Register PIDPeripheral ID Register PID Field Descriptions Type Bit Field Peripheral Control Register PCRPeripheral Control Register PCR Field Descriptions Pere Soft Free Peripheral Settings Control Register Persetcntl Lect Cbatranspr1XMODE Prescalerse ENPLL1 ENPLL3ENPLL2 Peripheral Global Enable Register Gblen Field Descriptions Peripheral Global Enable Register Gblen TAT Peripheral Global Enable Status Register GblenstatGBL ENS Block n Enable Register BLKnEN Field Descriptions Block n Enable Register BLKnEN Block n Enable Status Register BLKnENSTAT Block n Enable Status Register BLKnENSTAT 16BNODEID RapidIO DEVICEID1 Register DEVICEIDREG1RapidIO DEVICEID1 Register DEVICEIDREG1 Field Descriptions 8BNODEID RapidIO DEVICEID2 Register DEVICEIDREG2 Field Descriptions RapidIO DEVICEID2 Register DEVICEIDREG2 Packet Forwarding Register n for 16b DeviceIDs PF16BCNTLn Packet Forwarding Register n for 8b DeviceIDs PF8BCNTLn Term Invpa Rate Buswidth CDR LOS Align CFGRX2219 Low Freq Gain Zero Freq at e28 min Entx EnftSwing Invpa Rate Buswidth CFGTX1512 Amplitude Reduction Swing BitsDE Bits CFGTX119 Amplitude mV dfpp MPY Serdes Macro Configuration Register n SERDESCFGnCNTLMPY Enpll RIOCLK/RIOCLK DOORBELLn Interrupt Status Register DOORBELLnICSR DOORBELLn Interrupt Status Register DOORBELLnICSR DOORBELLn Interrupt Clear Register DOORBELLnICCR DOORBELLn Interrupt Clear Register DOORBELLnICCR RX Cppi Interrupt Status Register Rxcppiicsr RX Cppi Interrupt Status Register Rxcppiicsr RX Cppi Interrupt Clear Register Rxcppiiccr RX Cppi Interrupt Clear Register Rxcppiiccr TX Cppi Interrupt Status Register Txcppiicsr TX Cppi Interrupt Status Register Txcppiicsr TX Cppi Interrupt Clear Register Txcppiiccr TX Cppi Interrupt Clear Register Txcppiiccr ICS31-0 Load/Store module interrupt condition status bits LSU Status Interrupt Register LsuicsrLSU Status Interrupt Register Lsuicsr Field Descriptions ICS31-0 Load/Store module interrupt clear bits LSU Clear Interrupt Register LSU IccrLSU Clear Interrupt Register LSU Iccr Field Descriptions 31-17 126 DOORBELLn Interrupt Condition Routing Register DOORBELLnICRR 128 ICR RX Cppi Interrupt condition routing bits RX Cppi Interrupt Condition Routing Register Rxcppi Icrr RX Cppi Interrupt Condition Routing Register Rxcppi ICRR2 RX Cppi Interrupt Condition Routing Register Rxcppi ICRR2 ICR TX Cppi Interrupt condition routing bits TX Cppi Interrupt Condition Routing Register Txcppi Icrr TX Cppi Interrupt Condition Routing Register Txcppi ICRR2 TX Cppi Interrupt Condition Routing Register Txcppi ICRR2 ICR LSU Module Interrupt Condition Routing Register 0 LSUICRR0 LSU Module Interrupt Condition Routing Register 1 LSUICRR1 LSU Module Interrupt Condition Routing Register 1 LSUICRR1 LSU Module Interrupt Condition Routing Register 2 LSUICRR2 LSU Module Interrupt Condition Routing Register 2 LSUICRR2 LSU Module Interrupt Condition Routing Register 3 LSUICRR3 LSU Module Interrupt Condition Routing Register 3 LSUICRR3 Errrstevnticrr Field Descriptions Errrstevnticrr ICR11 ERRRSTEVNTICRR2 Field Descriptions ERRRSTEVNTICRR3 Field Descriptions ERRRSTEVNTICRR3 INTDSTn Interrupt Status Decode Registers INTDSTnDECODE INTDSTn Interrupt Status Decode Registers INTDSTnDECODE Value INTDSTn Interrupt Rate Control Registers INTDSTnRATECNTLCountdownvalue Countdown Bit Ext address fields LSUn Control Register 0 LSUnREG0LSU n Control Register 0 LSU nREG0 Field Descriptions Addressmsb LSU n Control Register 1 LSU nREG1 Field Descriptions AddresslsbconfigoffsetAddresslsb Configoffse T LSUn Control Register 1 LSUnREG1 32b DSP byte address LSUn Control Register 2 LSUnREG2LSU n Control Register 2 LSU nREG2 Field Descriptions Dspaddress Bytecount LSUn Control Register 3 LSUnREG3LSU n Control Register 3 LSU nREG3 Field Descriptions LSUn Control Register 4 LSUnREG4 Field Descriptions LSUn Control Register 4 LSUnREG4 Hopcount Packettype LSUn Control Register 5 LSUnREG5LSU n Control Register 5 LSU nREG5 Field Descriptions Drbllinfo Completionc LSUn Control Register 6 LSUnREG6LSUn Control Register 6 LSUnREG6 Field Descriptions Completioncode BSY Flowmask LSU Congestion Control Flow Mask n Lsuflowmasks n Txhdp Txcp Rxhdp Queue Receive DMA Completion Pointer Registers QUEUEnRXDMACP Queue Receive DMA Completion Pointer Registers QUEUEnRXDMACP Transmit Queue Teardown Register Txqueueteardown QUEUE7FLOWMASK QUEUE6FLOWMASK QUEUE1FLOWMASK QUEUE0FLOWMASKQUEUE3FLOWMASK QUEUE2FLOWMASK QUEUE5FLOWMASK QUEUE4FLOWMASK Mask QUEUE15FLOWMASK QUEUE14FLOWMASK Receive Queue Teardown Register Rxqueueteardown Receive Queue Teardown Register Rxqueueteardown Receive Cppi Control Register Rxcppicntl Field Descriptions Receive Cppi Control Register Rxcppicntl 2NUMMSGS Txqueuemap3NUMMSGS 3QUEUEPTR 6QUEUEPTR 7NUMMSGS7QUEUEPTR 6NUMMSGS 10QUEUEPTR 11NUMMSGS11QUEUEPTR 10NUMMSGS 14QUEUEPTR 15NUMMSGS15QUEUEPTR 14NUMMSGS Mailbox-to-Queue Mapping Register Ln RXUMAPLn Mailbox-to-Queue Mapping Register Hn RXUMAPHn Flowcntlid Flow Control Table Entry Registers FLOWCNTLn Device Identity CAR Devid Field Descriptions Device Identity CAR Devid Vendor supply device revision Device Information CAR DevinfoDevice Information CAR Devinfo Field Descriptions Devicerev Assembly Identity CAR Asblyid Field Descriptions Assembly Identity CAR Asblyid Assembly Information CAR Asblyinfo Field Descriptions Assembly Information CAR Asblyinfo Processing Element Features CAR Pefeat Field Descriptions Processing Element Features CAR Pefeat Source Operations CAR Srcop Field Descriptions Source Operations CAR Srcop Destination Operations CAR Destop Field Descriptions Destination Operations CAR Destop Ressingcont Processing Element Logical Layer Control CSR PellctlExtendedaddress Ingcontrol Lcsba Local Configuration Space Base Address 0 CSR Lclcfghbar Local Configuration Space Base Address 1 CSR Lclcfgbar Local Configuration Space Base Address 1 CSR Lclcfgbar Base Device ID CSR Baseid Field Descriptions Base Device ID CSR Baseid Viceid Host Base Device ID Lock CSR HostbaseidlockHostbasedeviceid Hostbasede Componenttag Component Tag CSR ComptagComponent Tag CSR Comptag Field Descriptions Efid Efptr Port Link Time-Out Control CSR Spltctl Port Link Timeout Control CSR Spltctl Field Descriptions Port Response Time-Out Control CSR Sprtctl Port Response Time-Out Control CSR Sprtctl Port General Control CSR Spgenctl Field Descriptions Port General Control CSR Spgenctl Command Port Link Maintenance Request CSR n SPnLMREQ Port Link Maintenance Response CSR n SPnLMRESP Port Local AckID Status CSR n SPnACKIDSTAT Port Error and Status CSR n SPnERRSTAT Field Descriptions Port Error and Status CSR n SPnERRSTAT Lized PortokPortuninitia Port Control CSR n SPnCTL Field Descriptions Port Control CSR n SPnCTL Nable Port Control CSR n SP nCTL Field Descriptions Error Reporting Block Header Errrptbh Field Descriptions Error Reporting Block Header Errrptbh Logical/Transport Layer Error Detect CSR Errdet Logical/Transport Layer Error Enable CSR Erren 50 bit addresses Logical/Transport Layer High Address Capture CSR HaddrcaptADDRESS6332 Xamsbs Logical/Transport Layer Address Capture CSR AddrcaptADDRESS313 Msbdestid Logical/Transport Layer Device ID Capture CSR IdcaptMsbdestid Destid Msbsourceid Sourceid Ftype Logical/Transport Layer Control Capture CSR CtrlcaptFtype Ttype Msginfo Impspecific Deviceid Port-Write Target Device ID CSR PwtgtidPort-Write Target Device ID CSR Pwtgtid Field Descriptions Deviceidmsb Port Error Detect CSR n SPnERRDET Field Descriptions Port Error Detect CSR n SPnERRDET Port Error Rate Enable CSR n SPnRATEEN Field Descriptions Port Error Rate Enable CSR n SPnRATEEN Port n Attributes Error Capture CSR 0 SPnERRATTRCAPTDBG0 CAPTURE0 CAPTURE0 CAPTURE1 CAPTURE1 CAPTURE2 CAPTURE2 CAPTURE3 CAPTURE3 Port Error Rate CSR n SPnERRRATE Field Descriptions Port Error Rate CSR n SPnERRRATE Port Error Rate Threshold CSR n SPnERRTHRESH Discoveryti Port IP Discovery Timer in 4x mode SpipdiscoverytimerDiscoverytimer Pwtimer Port IP Mode CSR Spipmode Field Descriptions Port IP Mode CSR Spipmode Rsten Port IP Mode CSR Spipmode Field Descriptions Prescale Serial Port IP Prescalar IpprescalSerial Port IP Prescalar Ipprescal Field Descriptions Pwcapt Port-Write-In Capture CSR n SPIPPWINCAPTn Portid Port Reset Option CSR n SPnRSTOPTPort Reset Option CSR n SP nRSTOPT Field Descriptions Port Control Independent Register n SPnCTLINDEP Irqen MaxretryenMaxretryer Maxretryth Silencetimer Port Silence Timer n SPnSILENCETIMERPort Silence Timer n SPnSILENCETIMER Field Descriptions Multevntcs Multevntcs Port Control Symbol Transmit n SP nCSTX Field Descriptions Port Control Symbol Transmit n SPnCSTX Important Notice