Arria® 10 or Cyclone® 10 GX Avalon® Memory-Mapped (Avalon-MM) DMA Interface for PCI Express* Solutions User Guide

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ID 683425
Date 9/10/2024
Public
Document Table of Contents
Document Table of Contents x
1. Datasheet 2. Getting Started with the Avalon-MM DMA 3. Parameter Settings 4. Physical Layout 5. IP Core Interfaces 6. Registers 7. Reset and Clocks 8. Error Handling 9. PCI Express Protocol Stack 10. Arria® 10 or Cyclone® 10 GX Avalon-MM DMA for PCI Express 11. Design Implementation A. Transaction Layer Packet (TLP) Header Formats B. Arria® 10 or Cyclone® 10 GX Avalon-MM DMA Interface for PCIe Solutions User Guide Archive C. Document Revision History
1. Datasheet x
1.1. Arria® 10 or Cyclone® 10 GX Avalon-MM DMA Interface for PCIe* Datasheet 1.2. Features 1.3. Comparison of Avalon-ST, Avalon-MM and Avalon-MM with DMA Interfaces 1.4. Release Information 1.5. Device Family Support 1.6. Design Examples 1.7. IP Core Verification 1.8. Resource Utilization 1.9. Recommended Speed Grades 1.10. Creating a Design for PCI Express
1.7. IP Core Verification x
1.7.1. Compatibility Testing Environment
2. Getting Started with the Avalon-MM DMA x
2.1. Understanding the Avalon-MM DMA Ports 2.2. Generating the Testbench 2.3. Simulating the Example Design in ModelSim* 2.4. Running a Gate-Level Simulation 2.5. Generating Synthesis Files 2.6. Compiling the Design 2.7. Creating a Quartus® Prime Project
2.2. Generating the Testbench x
2.2.1. Understanding the Simulation Generated Files 2.2.2. Understanding Simulation Log File Generation
3. Parameter Settings x
3.1. Parameters 3.2. Arria® 10 or Cyclone® 10 GX Avalon-MM Settings 3.3. Base Address Register (BAR) Settings 3.4. Device Identification Registers 3.5. PCI Express and PCI Capabilities Parameters 3.6. Configuration, Debug, and Extension Options 3.7. PHY Characteristics 3.8. Example Designs
3.1. Parameters x
3.1.1. RX Buffer Allocation Selections Available by Interface Type
3.5. PCI Express and PCI Capabilities Parameters x
3.5.1. Device Capabilities 3.5.2. Error Reporting 3.5.3. Link Capabilities 3.5.4. MSI and MSI-X Capabilities 3.5.5. Slot Capabilities 3.5.6. Power Management 3.5.7. Vendor Specific Extended Capability (VSEC)
4. Physical Layout x
4.1. Hard IP Block Placement In Cyclone® 10 GX Devices 4.2. Hard IP Block Placement In Arria® 10 Devices 4.3. Channel and Pin Placement for the Gen1, Gen2, and Gen3 Data Rates 4.4. Channel Placement and fPLL and ATX PLL Usage for the Gen3 Data Rate 4.5. PCI Express Gen3 Bank Usage Restrictions
5. IP Core Interfaces x
5.1. Arria® 10 or Cyclone® 10 GX DMA Avalon-MM DMA Interface to the Application Layer 5.2. Clock Signals 5.3. Reset, Status, and Link Training Signals 5.4. MSI Interrupts for Endpoints 5.5. Hard IP Reconfiguration Interface 5.6. Physical Layer Interface Signals 5.7. Test Signals 5.8. Arria® 10 Development Kit Conduit Interface
5.1. Arria® 10 or Cyclone® 10 GX DMA Avalon-MM DMA Interface to the Application Layer x
5.1.1. Avalon-MM DMA Interfaces when Descriptor Controller Is Internally Instantiated 5.1.2. Read Data Mover 5.1.3. Write DMA Avalon-MM Master Port 5.1.4. RX Master Module 5.1.5. Non-Bursing Slave Module 5.1.6. 32-Bit Control Register Access (CRA) Slave Signals 5.1.7. Avalon-ST Descriptor Control Interface when Instantiated Separately 5.1.8. Descriptor Controller Interfaces when Instantiated Internally
5.1.7. Avalon-ST Descriptor Control Interface when Instantiated Separately x
5.1.7.1. Avalon-ST Descriptor Status Interface 5.1.7.2. Avalon® -ST Descriptor Status Sources
5.1.8. Descriptor Controller Interfaces when Instantiated Internally x
5.1.8.1. Read Descriptor Controller Avalon-MM Master interface 5.1.8.2. Write Descriptor Controller Avalon-MM Master Interface 5.1.8.3. Read Descriptor Table Avalon-MM Slave Interface 5.1.8.4. Write Descriptor Table Avalon-MM Slave Interface
5.6. Physical Layer Interface Signals x
5.6.1. Serial Data Signals 5.6.2. PIPE Interface Signals
6. Registers x
6.1. Correspondence between Configuration Space Registers and the PCIe Specification 6.2. Type 0 Configuration Space Registers 6.3. Type 1 Configuration Space Registers 6.4. PCI Express Capability Structures 6.5. Intel-Defined VSEC Registers 6.6. Advanced Error Reporting Capability 6.7. DMA Descriptor Controller Registers 6.8. Control Register Access (CRA) Avalon-MM Slave Port
6.5. Intel-Defined VSEC Registers x
6.5.1. CvP Registers
6.6. Advanced Error Reporting Capability x
6.6.1. Uncorrectable Internal Error Mask Register 6.6.2. Uncorrectable Internal Error Status Register 6.6.3. Correctable Internal Error Mask Register 6.6.4. Correctable Internal Error Status Register
6.7. DMA Descriptor Controller Registers x
6.7.1. Read DMA Descriptor Controller Registers 6.7.2. Write DMA Descriptor Controller Registers 6.7.3. Read DMA and Write DMA Descriptor Format 6.7.4. Read DMA Example 6.7.5. Software Program for Simultaneous Read and Write DMA
7. Reset and Clocks x
7.1. Reset Sequence for Hard IP for PCI Express IP Core and Application Layer 7.2. Clocks
7.2. Clocks x
7.2.1. Clock Domains 7.2.2. Clock Summary
7.2.1. Clock Domains x
7.2.1.1. coreclkout_hip 7.2.1.2. pld_clk
8. Error Handling x
8.1. Physical Layer Errors 8.2. Data Link Layer Errors 8.3. Transaction Layer Errors 8.4. Error Reporting and Data Poisoning 8.5. Uncorrectable and Correctable Error Status Bits
9. PCI Express Protocol Stack x
9.1. Top-Level Interfaces 9.2. Data Link Layer 9.3. Physical Layer
9.1. Top-Level Interfaces x
9.1.1. Avalon-MM DMA Interface 9.1.2. Clocks and Reset 9.1.3. Interrupts 9.1.4. PIPE
10. Arria® 10 or Cyclone® 10 GX Avalon-MM DMA for PCI Express x
10.1. Understanding the Internal DMA Descriptor Controller 10.2. Understanding the External DMA Descriptor Controller
11. Design Implementation x
11.1. Making Pin Assignments to Assign I/O Standard to Serial Data Pins 11.2. Recommended Reset Sequence to Avoid Link Training Issues 11.3. SDC Timing Constraints 11.4. Warnings Encountered When Using Narrow Avalon-MM Interfaces
A. Transaction Layer Packet (TLP) Header Formats x
A.1. TLP Packet Formats without Data Payload A.2. TLP Packet Formats with Data Payload
C. Document Revision History x
C.1. Document Revision History for the Arria® 10 or Cyclone® 10 GX Avalon® Memory Mapped (Avalon-MM) DMA Interface for PCIe* Solutions User Guide
1. Datasheet
2. Getting Started with the Avalon-MM DMA
3. Parameter Settings
4. Physical Layout
5. IP Core Interfaces
6. Registers
7. Reset and Clocks
8. Error Handling
9. PCI Express Protocol Stack
10. Arria® 10 or Cyclone® 10 GX Avalon-MM DMA for PCI Express
11. Design Implementation
A. Transaction Layer Packet (TLP) Header Formats
B. Arria® 10 or Cyclone® 10 GX Avalon-MM DMA Interface for PCIe Solutions User Guide Archive
C. Document Revision History

9.2. Data Link Layer

The Data Link Layer is located between the Transaction Layer and the Physical Layer. It maintains packet integrity and communicates (by DLL packet transmission) at the PCI Express link level.

The DLL implements the following functions:

  • Link management through the reception and transmission of DLL Packets (DLLP), which are used for the following functions:
    • Power management of DLLP reception and transmission
    • To transmit and receive ACK/NAK packets
    • Data integrity through generation and checking of CRCs for TLPs and DLLPs
    • TLP retransmission in case of NAK DLLP reception or replay timeout, using the retry (replay) buffer
    • Management of the retry buffer
    • Link retraining requests in case of error through the Link Training and Status State Machine (LTSSM) of the Physical Layer
Figure 47. Data Link Layer

The DLL has the following sub-blocks:

  • Data Link Control and Management State Machine—This state machine connects to both the Physical Layer’s LTSSM state machine and the Transaction Layer. It initializes the link and flow control credits and reports status to the Transaction Layer.
  • Power Management—This function handles the handshake to enter low power mode. Such a transition is based on register values in the Configuration Space and received Power Management (PM) DLLPs. All of the Arria® 10 or Cyclone® 10 GX Hard IP for PCIe IP core variants do not support low power modes.
  • Data Link Layer Packet Generator and Checker—This block is associated with the DLLP’s 16-bit CRC and maintains the integrity of transmitted packets.
  • Transaction Layer Packet Generator—This block generates transmit packets, including a sequence number and a 32-bit Link CRC (LCRC). The packets are also sent to the retry buffer for internal storage. In retry mode, the TLP generator receives the packets from the retry buffer and generates the CRC for the transmit packet.
  • Retry Buffer—The retry buffer stores TLPs and retransmits all unacknowledged packets in the case of NAK DLLP reception. In case of ACK DLLP reception, the retry buffer discards all acknowledged packets.
  • ACK/NAK Packets—The ACK/NAK block handles ACK/NAK DLLPs and generates the sequence number of transmitted packets.
  • Transaction Layer Packet Checker—This block checks the integrity of the received TLP and generates a request for transmission of an ACK/NAK DLLP.
  • TX Arbitration—This block arbitrates transactions, prioritizing in the following order:
    • Initialize FC Data Link Layer packet
    • ACK/NAK DLLP (high priority)
    • Update FC DLLP (high priority)
    • PM DLLP
    • Retry buffer TLP
    • TLP
    • Update FC DLLP (low priority)
    • ACK/NAK FC DLLP (low priority)
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