Multi Channel DMA for PCI Express* Intel® FPGA IP Design Example User Guide

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ID 683517
Date 2/06/2022
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Document Table of Contents
Document Table of Contents x
1. Terms and Acronyms 2. Design Example Detailed Description 3. Design Example Quick Start Guide 4. Multi Channel DMA for FPGA IP Design Example User Guide Archives 5. Document Revision History for the Multi Channel DMA for FPGA IP Design Example User Guide
2. Design Example Detailed Description x
2.1. Design Example Overview 2.2. Hardware and Software Requirements 2.3. PIO Using MCDMA Bypass Mode 2.4. Avalon-ST Packet Generate/Check 2.5. Avalon-ST Device-side Packet Loopback 2.6. Avalon-MM DMA 2.7. Traffic Generator and Checker 2.8. External Descriptor Controller
2.3. PIO Using MCDMA Bypass Mode x
2.3.1. Avalon-ST PIO Using MCDMA Bypass Mode 2.3.2. Avalon-MM PIO Using MCDMA Bypass mode
2.3.1. Avalon-ST PIO Using MCDMA Bypass Mode x
2.3.1.1. Four-Port Avalon-ST PIO Using MCDMA Bypass Mode 2.3.1.2. Single-Port Avalon-ST PIO Using MCDMA Bypass Mode
2.3.1.1. Four-Port Avalon-ST PIO Using MCDMA Bypass Mode x
2.3.1.1.1. Simulation Result 2.3.1.1.2. Hardware Test Result
2.3.2. Avalon-MM PIO Using MCDMA Bypass mode x
2.3.2.1. Simulation Results 2.3.2.2. Hardware Test Results
2.4. Avalon-ST Packet Generate/Check x
2.4.1. Four-Port Avalon-ST Packet Generate/Check 2.4.2. Single-Port Avalon-ST Packet Generate/Check
2.4.1. Four-Port Avalon-ST Packet Generate/Check x
2.4.1.1. Simulation Results 2.4.1.2. Hardware Test Results
2.4.2. Single-Port Avalon-ST Packet Generate/Check x
2.4.2.1. Simulation Waveforms 2.4.2.2. Simulation Log
2.5. Avalon-ST Device-side Packet Loopback x
2.5.1. Simulation Results 2.5.2. Hardware Test Results
2.6. Avalon-MM DMA x
2.6.1. Simulation Results 2.6.2. Hardware Test Results
2.7. Traffic Generator and Checker x
2.7.1. Traffic Generator and checker Example Design Register Map
2.8. External Descriptor Controller x
2.8.1. Registers
2.8.1. Registers x
2.8.1.1. GCSR Registers (Base address 64’h00000) 2.8.1.2. QCSR Registers(Base address 64’h10000)
3. Design Example Quick Start Guide x
3.1. Design Example Directory Structure 3.2. Generating the Example Design using Intel® Quartus® Prime 3.3. Simulating the Design Example 3.4. Compiling the Example Design in Intel® Quartus® Prime 3.5. Running the Design Example Application on a Hardware Setup
3.2. Generating the Example Design using Intel® Quartus® Prime x
3.2.1. Procedure
3.3. Simulating the Design Example x
3.3.1. Testbench Overview 3.3.2. Supported Simulators 3.3.3. Example Testbench Flow for DMA Test with Avalon-ST Packet Generate/Check Design Example 3.3.4. Run the Simulation Script 3.3.5. View the Results
3.5. Running the Design Example Application on a Hardware Setup x
3.5.1. Program the FPGA 3.5.2. Quick Start Guide
3.5.2. Quick Start Guide x
3.5.2.1. Software Test Setup 3.5.2.2. Driver Support 3.5.2.3. MCDMA Custom Driver 3.5.2.4. MCDMA DPDK Poll Mode Driver 3.5.2.5. MCDMA Kernel Mode Character Device Driver 3.5.2.6. MCDMA Kernel Mode Network Device Driver
3.5.2.3. MCDMA Custom Driver x
3.5.2.3.1. Prerequisites 3.5.2.3.2. Software Setup 3.5.2.3.3. Run the Reference Example Application 3.5.2.3.4. Testing Bitstream Configuration beyond 256 Channels 3.5.2.3.5. External Descriptor Mode Verification
3.5.2.3.1. Prerequisites x
3.5.2.3.1.1. Configuration Changes from BIOS 3.5.2.3.1.2. External Packages 3.5.2.3.1.3. Set the Boot Parameters
3.5.2.3.2. Software Setup x
3.5.2.3.2.1. Installing the Linux Kernel Driver 3.5.2.3.2.2. Build and Install User Space Library 3.5.2.3.2.3. Enabling VFs and Create Guest VM by Using QEMU 3.5.2.3.2.4. Establish Communication Between Host and QEMU
3.5.2.3.3. Run the Reference Example Application x
3.5.2.3.3.1. Meta Data Test 3.5.2.3.3.2. BAM Test 3.5.2.3.3.3. BAS Test 3.5.2.3.3.4. Packet Gen Test
3.5.2.4. MCDMA DPDK Poll Mode Driver x
3.5.2.4.1. Prerequisites 3.5.2.4.2. Install PMD and Test Application 3.5.2.4.3. Run the Reference Example Application
3.5.2.4.1. Prerequisites x
3.5.2.4.1.1. Set the Boot Parameters 3.5.2.4.1.2. Configuration Changes from BIOS 3.5.2.4.1.3. Install and Build Testpmd
3.5.2.4.2. Install PMD and Test Application x
3.5.2.4.2.1. Create VM Environment
3.5.2.4.3. Run the Reference Example Application x
3.5.2.4.3.1. Example of Verifying on an AVMM Design 3.5.2.4.3.2. BAM Test 3.5.2.4.3.3. BAS Test
3.5.2.5. MCDMA Kernel Mode Character Device Driver x
3.5.2.5.1. Prerequisites 3.5.2.5.2. Software Setup 3.5.2.5.3. Examples
3.5.2.5.1. Prerequisites x
3.5.2.5.1.1. Host Configuration 3.5.2.5.1.2. Set the Boot Parameters
3.5.2.5.2. Software Setup x
3.5.2.5.2.1. Build and Install Kernel Driver 3.5.2.5.2.2. Build and Install Libmcmem 3.5.2.5.2.3. Build Testapp 3.5.2.5.2.4. Configure Kernel Driver 3.5.2.5.2.5. Configure Libmcmem 3.5.2.5.2.6. Configure Testapp
3.5.2.6. MCDMA Kernel Mode Network Device Driver x
3.5.2.6.1. Build and Install Netdev Driver 3.5.2.6.2. Enable VFs if SRIOV is Supported 3.5.2.6.3. Configure the Number of Channels Supported on the Device 3.5.2.6.4. Configure the MTU Value 3.5.2.6.5. Configure the Device Communication 3.5.2.6.6. Configure Transmit Queue Selection Mechanism 3.5.2.6.7. Test Procedure by Using Name Space Environment 3.5.2.6.8. PIO Test
3.5.2.6.6. Configure Transmit Queue Selection Mechanism x
3.5.2.6.6.1. MCDMA Queue Selection 3.5.2.6.6.2. Transmit Packet Steering (XPS) 3.5.2.6.6.3. Default
1. Terms and Acronyms
2. Design Example Detailed Description
3. Design Example Quick Start Guide
4. Multi Channel DMA for FPGA IP Design Example User Guide Archives
5. Document Revision History for the Multi Channel DMA for FPGA IP Design Example User Guide

3.3.3. Example Testbench Flow for DMA Test with Avalon-ST Packet Generate/Check Design Example

The DMA testbench for the Avalon-ST Packet Generate/Check design example demonstrates the following two major tasks:
  • Host-to-Device: Transferring packets stored in the host memory to the Packet Checker in the design example user logic, where a checker module verifies the integrity of the packet
  • Device-to-Host: Packets generated from a Generator module are transferred to the host memory where the host checks the packet integrity
Note: This testbench implements transfer of one packet with length of 4096 bytes.
The DMA testbench for the design example completes the following tasks for each of the 4 ports supported by the DUT:
  1. Set up 4096 bytes of incrementing data pattern for testing data movement from the host to the device and then back to the host.
  2. Write the expected packet length value (4096 bytes) to the Packet Generation and Checker in the design example user logic through the PIO. This value is used by the Packet checker module for testing packet integrity.
  3. MSI-X is enabled and configured for launching a memory write to signal the end of each descriptor’s DMA transaction. Write-Back function is kept disabled for the simulation.
  4. Set up the H2D (Host-to-Device) queue in the Multi Channel DMA.
  5. Set up three H2D descriptors in the host memory, with the source address pointing to the incrementing data pattern locations in the host memory. The start of packet (SOF) and end of packet (EOF) markers along with packet length are indicated in the descriptors.
  6. At the last step of the Queue programming, the Multi Channel DMA tail pointer register is written, which triggers the Multi Channel DMA to start the H2D DMA transaction.
  7. The previous step instructs the H2D Data Mover to fetch the descriptors from the host memory.
  8. The Multi Channel DMA H2D Data Mover reads the data from the host memory and forwards the packet to the Packet Generator and Checker through the AVST Streaming interface.
  9. The checker module receives the packet and checks for integrity by testing the data pattern, length as expected and proper receipt of the “end of packet” marker. If the packet is found to be proper, the good packet count is incremented by 1 else the bad packet count is incremented.
  10. The testbench does a PIO read access of the Good Packet Count and Bad Packet Count registers and displays the test success or failure status.
  11. MSI-X write commands are triggered for every description or completion which are checked by the testbench for proper receipt.
  12. Next, set up the D2H (Device-to-Host) Queue.
  13. Setup three D2H descriptors in the host memory, with the destination address pointing to a new address space in host memory which is pre-filled with all zeroes.
  14. At the last step of the Queue programming, the Multi Channel DMA tail pointer register is written, which triggers the Multi Channel DMA to start the D2H DMA transaction.
  15. The previous step instructs the H2D Data Mover to fetch the descriptors from the host memory to start the D2H DMA transaction.
  16. The Multi Channel DMA D2H Data Mover reads the incoming packet from the Packet Generator and writes the data to the host memory according to the descriptors fetched in the previous step.
  17. MSI-X write commands are triggered for every description completion which are checked by the testbench for proper receipt.
  18. Compares the data written back to the system memory in D2H task with the standard incrementing pattern and declare test success/failure.

The simulation reports Simulation stopped due to successful completion if no errors occur.

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