Scalable Scatter-Gather DMA Intel® FPGA IP Design Example User Guide

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ID 823179
Date 4/30/2025
Public
Document Table of Contents
Document Table of Contents x
1. Design Example Description 2. Quick Start Guide 3. Document Revision History for the Scalable Scatter-Gather DMA Intel® FPGA IP Design Example User Guide
1. Design Example Description x
1.1. H2D ST to D2H ST Loopback Design Example
1.1. H2D ST to D2H ST Loopback Design Example x
1.1.1. DMA PCIe* Mode Design Example 1.1.2. DMA SoC Mode Design Example
2. Quick Start Guide x
2.1. Directory Structure 2.2. Generating the Design Example 2.3. Simulating the Design Example 2.4. Testbench 2.5. Compiling the Design Example 2.6. Hardware and Software Requirements 2.7. Running the Design Example
2.3. Simulating the Design Example x
2.3.1. DMA SoC Mode Example Design 2.3.2. DMA PCIe Mode Example Design
2.3.2. DMA PCIe Mode Example Design x
2.3.2.1. Running Simulation using VCS* MX 2.3.2.2. Running Simulation Using QuestaSim* 2.3.2.3. Running Simulation using Xcelium 2.3.2.4. Running Simulation using Riviera-PRO
2.4. Testbench x
2.4.1. DMA SoC Mode H2D ST to D2H ST Loopback Example Testbench 2.4.2. DMA PCIe Mode H2D ST to D2H ST Loopback & H2D MM Example Testbench
2.4.2. DMA PCIe Mode H2D ST to D2H ST Loopback & H2D MM Example Testbench x
2.4.2.1. Design Example Testbench
2.7. Running the Design Example x
2.7.1. Running the DMA SoC Mode H2D ST to D2H ST Loopback Design Example 2.7.2. Running the DMA PCIe Mode H2D ST to D2H ST Loopback Design Example
2.7.1. Running the DMA SoC Mode H2D ST to D2H ST Loopback Design Example x
2.7.1.1. Building the Software Application Project for Nios® V/m Processor 2.7.1.2. Programming the Example Design into the Development Board
2.7.2. Running the DMA PCIe Mode H2D ST to D2H ST Loopback Design Example x
2.7.2.1. Installing the Linux Kernel Driver 2.7.2.2. Running the Loopback Design Example
2.7.2.2. Running the Loopback Design Example x
2.7.2.2.1. Testing H2D ST to D2H ST Loopback 2.7.2.2.2. Testing H2D MM
1. Design Example Description
2. Quick Start Guide
3. Document Revision History for the Scalable Scatter-Gather DMA Intel® FPGA IP Design Example User Guide

2.7.1. Running the DMA SoC Mode H2D ST to D2H ST Loopback Design Example

The design example in this topic demonstrates SSGDMA IP with an embedded microprocessor Nios® V/m processor. Execute the following flow:

  1. Enable prefetcher and setup all D2H_ST and H2D_ST ports.
  2. Fill H2D_ST descriptors and updates the insert pointer.
  3. Perform the following steps and repeat for each port numbers.
    1. Fill D2H_ST descriptors and updates the insert pointer.
    2. Detect completion of D2H_ST receive via interrupt.
    3. Check completion of H2D_ST transfer via polling.
    4. Compare both H2D_ST and D2H_ST data.
  4. If there are H2D_MM ports, the application fills H2D_MM(write access) and D2H_MM(read access) descriptors. The insert pointer is updated, and the extracted pointer is polled for completion. The application compares the write and read data, Repeat the same flow if there is more than one port.
  5. Free memory resources for descriptors and data buffers.

Section Content
Building the Software Application Project for Nios V/m Processor
Programming the Example Design into the Development Board

Level Two Title