GTS AXI Multichannel DMA IP for PCI Express User Guide

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ID 847470
Date 5/06/2025
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Document Table of Contents
Document Table of Contents x
1. Overview 2. Quick Start Guide 3. Configuring and Generating the GTS AXI Multichannel DMA IP for PCI Express 4. Integrating the IP With Your Application 5. Simulating the IP 6. Validating the IP A. Appendix A: Functional Description B. Appendix B: Registers C. Document Revision History for the GTS AXI Multichannel DMA IP for PCI Express*
1. Overview x
1.1. About the GTS AXI Multichannel DMA IP for PCI Express* 1.2. About the Document 1.3. Applications 1.4. Key Concepts 1.5. IP Design Flow 1.6. Design Guidelines 1.7. Design Flow Requirements
1.1. About the GTS AXI Multichannel DMA IP for PCI Express* x
1.1.1. IP Release Information 1.1.2. IP Features 1.1.3. IP High-level Block Diagram 1.1.4. Licensing the IP 1.1.5. Device Family Support 1.1.6. Device Speed Grade Support 1.1.7. Resource Utilization 1.1.8. IP and Design Example Support
1.1.2. IP Features x
1.1.2.1. Root Port Mode Features 1.1.2.2. Endpoint Mode Features
1.2. About the Document x
1.2.1. Target Audience 1.2.2. Conventions Used in the Document 1.2.3. Terminology 1.2.4. Acronyms 1.2.5. Reference Documents and Training
1.4. Key Concepts x
1.4.1. PCI Express and DMA 1.4.2. Altera FPGA IPs for PCI Express and DMA Controller 1.4.3. Example Use Case
1.6. Design Guidelines x
1.6.1. Supporting IPs 1.6.2. Aligning IP Settings with the GTS AXI Streaming IP for PCI Express
1.7. Design Flow Requirements x
1.7.1. Software Requirements 1.7.2. Hardware Requirements 1.7.3. Supported EDA Tools
2. Quick Start Guide x
2.1. Step-by-step IP Bring-up 2.2. Reset Sequence
2.1. Step-by-step IP Bring-up x
2.1.1. Downloading and Installing Quartus® Prime Software 2.1.2. Configuring and Generating the GTS AXI Multichannel DMA IP for PCI Express 2.1.3. Configuring and Generating the GTS AXI Streaming Intel FPGA IP for PCI Express 2.1.4. Configuring and Generating the GTS System PLL Clocks Intel FPGA IP 2.1.5. Configuring and Generating the GTS Reset Sequencer Intel FPGA IP 2.1.6. Configuring and Generating the Reset Release IP 2.1.7. Instantiating and Connecting the IP Interfaces 2.1.8. Simulate, Compile and Validate the Design on Hardware
2.2. Reset Sequence x
2.2.1. Cold Reset Sequence Triggered by PERST# Signal 2.2.2. Warm Reset Sequence Triggered by Hot Reset 2.2.3. Cold Reset Triggered by User 2.2.4. Warm Reset Triggered by User
3. Configuring and Generating the GTS AXI Multichannel DMA IP for PCI Express x
3.1. Creating the Quartus® Prime Project 3.2. Configuring the GTS AXI Multichannel DMA IP for PCI Express 3.3. Generating HDL for Simulation and Synthesis 3.4. Generating the Design Example 3.5. Compiling the Design Example
3.2. Configuring the GTS AXI Multichannel DMA IP for PCI Express x
3.2.1. IP Settings 3.2.2. PCIe Settings
3.2.2. PCIe Settings x
3.2.2.1. MCDMA Settings 3.2.2.2. PCI Express / PCI Capabilities 3.2.2.3. Base Address Registers
3.2.2.1. MCDMA Settings x
3.2.2.1.1. Multichannel DMA Mode 3.2.2.1.2. Bursting Master Mode 3.2.2.1.3. Bursting Slave Mode 3.2.2.1.4. BAM + BAS Mode 3.2.2.1.5. BAM + MCDMA Mode 3.2.2.1.6. BAM + BAS + MCDMA Mode
3.2.2.2. PCI Express / PCI Capabilities x
3.2.2.2.1. PCIe Device 3.2.2.2.2. PCIe MSI-X
3.2.2.2.2. PCIe MSI-X x
3.2.2.2.2.1. PCIe PF MSI-X 3.2.2.2.2.2. PCIe VF MSI-X
3.3. Generating HDL for Simulation and Synthesis x
3.3.1. IP Core Generation Output
4. Integrating the IP With Your Application x
4.1. Overview 4.2. Implementing Required Clocking 4.3. Implementing Required Resets 4.4. Connecting the GTS AXI Streaming IP-Facing Interfaces 4.5. Connect User Logic-Facing Interfaces
4.4. Connecting the GTS AXI Streaming IP-Facing Interfaces x
4.4.1. PCIe AXI-Stream TX Interface (ss_tx_st) 4.4.2. PCIe AXI-Stream RX Interface (ss_rx_st) 4.4.3. Control and Status Register Interface (ss_csr_lite) 4.4.4. Transmit Flow Control Credit Interface (ss_txcrdt) 4.4.5. Configuration Intercept Interface (CII) 4.4.6. Completion Timeout Interface (ss_cplto) 4.4.7. Function Level Reset (FLR) Interface 4.4.8. Control Shadow Interface (ss_ctrlshadow) 4.4.9. Error Interface
4.4.5. Configuration Intercept Interface (CII) x
4.4.5.1. Configuration Intercept Request Interface (ss_cii_req) 4.4.5.2. Configuration Intercept Response Interface (ss_cii_resp)
4.4.7. Function Level Reset (FLR) Interface x
4.4.7.1. FLR Received Interface (ss_flrrcvd) 4.4.7.2. FLR Completion Interface (ss_flrcmpl)
4.5. Connect User Logic-Facing Interfaces x
4.5.1. H2D AXI-Stream Manager (h2d_st_initatr) 4.5.2. D2H AXI-Stream Subordinate (d2h_st_respndr) 4.5.3. H2D/D2H AXI-MM Manager (dma_mm_initatr) 4.5.4. BAM AXI-MM Manager (bam_mm_initatr) 4.5.5. BAS AXI-MM Subordinate (bas_mm_respndr) 4.5.6. PIO AXI-Lite Manager (pio_lite_initiatr) 4.5.7. HIP Reconfiguration AXI-Lite Subordinate (user_csr_lite) 4.5.8. User Event MSI-X (user_msix) 4.5.9. User Event MSI (user_msi) 4.5.10. User Function Level Reset (user_flr) 4.5.11. User Configuration Intercept Interface 4.5.12. Configuration Slave (cs_lite_respndr)
4.5.11. User Configuration Intercept Interface x
4.5.11.1. User Configuration Intercept Request Interface (user_cii_req) 4.5.11.2. User Configuration Intercept Response Interface (user_cii_resp)
5. Simulating the IP x
5.1. Design Example Overview 5.2. Design Example Components 5.3. Simulating the Design Example
5.1. Design Example Overview x
5.1.1. AXI-S Device-side Packet Loopback Design Example
6. Validating the IP x
6.1. Hardware and Software Requirements 6.2. Running the Design Example Application on a Hardware Setup
6.2. Running the Design Example Application on a Hardware Setup x
6.2.1. Program the FPGA 6.2.2. Configuration Changes from BIOS 6.2.3. Host Operating System Check (if Working with Ubuntu 22.04) 6.2.4. Installing the Required Kernel Version (if Working with Ubuntu 24.04) 6.2.5. Set the Boot Parameters 6.2.6. Custom Driver 6.2.7. DPDK Poll Mode Driver
6.2.6. Custom Driver x
6.2.6.1. Prerequisites 6.2.6.2. PIO Test 6.2.6.3. Custom PIO Read Write Test 6.2.6.4. DMA Test
6.2.6.1. Prerequisites x
6.2.6.1.1. Steps for UIO Driver Installation 6.2.6.1.2. Enable Virtual Function 6.2.6.1.3. Build and Install User Space Library 6.2.6.1.4. Build the Reference Application
6.2.6.4. DMA Test x
6.2.6.4.1. AXI-S Device-side Packet Loopback (Device-side Packet Loopback)
6.2.7. DPDK Poll Mode Driver x
6.2.7.1. Prerequisites 6.2.7.2. PIO Test 6.2.7.3. DMA Test
6.2.7.1. Prerequisites x
6.2.7.1.1. Install PMD Driver 6.2.7.1.2. Bind the Device 6.2.7.1.3. Enable Virtual Function
6.2.7.3. DMA Test x
6.2.7.3.1. Device-side Packet Loopback
A. Appendix A: Functional Description x
A.1. High-level Functional Overview
A.1. High-level Functional Overview x
A.1.1. Multichannel DMA A.1.2. Bursting Master (BAM) A.1.3. Bursting Slave (BAS) A.1.4. MSI Interrupt A.1.5. Configuration Slave (CS) A.1.6. Root Port Address Translation Table Enablement A.1.7. Control and Status Register Interface A.1.8. Configuration Intercept Interface
A.1.1. Multichannel DMA x
A.1.1.1. H2D Data Mover A.1.1.2. D2H Data Mover A.1.1.3. Descriptors A.1.1.4. AXI4-Lite PIO Manager A.1.1.5. AXI-MM Write (H2D) and Read (D2H) Manager A.1.1.6. AXI-Stream Manager (H2D) and Subordinate (D2H) A.1.1.7. User MSI-X A.1.1.8. User Function Level Reset (FLR) A.1.1.9. Control and Status Registers
A.1.1.2. D2H Data Mover x
A.1.1.2.1. D2H Descriptor Fetch
A.1.1.3. Descriptors x
A.1.1.3.1. Support for Unaligned (or Byte-Aligned) Data Transfer A.1.1.3.2. Metadata Support A.1.1.3.3. MSI-X/Writeback
A.1.4. MSI Interrupt x
A.1.4.1. Endpoint MSI Support Through BAS A.1.4.2. MSI Interrupt Controller
A.1.5. Configuration Slave (CS) x
A.1.5.1. 14-bit AXI-MM Address Format A.1.5.2. Configuration Access Mechanism
B. Appendix B: Registers x
B.1. Queue Control B.2. MSI-X Memory Space B.3. Control Register (GCSR)
1. Overview
2. Quick Start Guide
3. Configuring and Generating the GTS AXI Multichannel DMA IP for PCI Express
4. Integrating the IP With Your Application
5. Simulating the IP
6. Validating the IP
A. Appendix A: Functional Description
B. Appendix B: Registers
C. Document Revision History for the GTS AXI Multichannel DMA IP for PCI Express*

4.4.4. Transmit Flow Control Credit Interface (ss_txcrdt)

Before a TLP can be transmitted, flow control logic verifies that the link partner's RX port has sufficient buffer space to accept it. The TX Flow Control interface reports the link partner's available RX buffer space to the GTS AXI MCDMA IP. The interface provides posted, non-posted, completion data, and header credit information. One data credit is equal to four dwords (DWs) and one header credit is equal to the maximum size header plus the optional digest field. The credits are advertised as the limit value as specified in the PCIe specification. This interface should be connected to the corresponding Transmit Flow Control Credit Interface of the GTS AXI Streaming IP.

For information on this interface, refer to Transmit Flow Control Credit Interface.

Interface clock: axi_st_clk

Table 37.  Transmit Flow Control Credit Interface
Signal Name Direction Description
ss_app_st_txcrdt_tvalid Input Indicates that the credit information on tdata is valid.
ss_app_st_txcrdt_tdata[18:0] Input

Carries the credit limit information and type of credit.

[15:0]: Credit Limit Value

  • All zeros indicates infinite credit for P, NP, CPL.

[18:16]: Credit Type

  • 3'b000 - Posted Header Credit
  • 3'b001 - Non-Posted Header Credit
  • 3'b010 - Completion Header Credit
  • 3'b011 - Reserved
  • 3'b100 - Posted Data Credit
  • 3'b101 - Non-Posted Data Credit
  • 3'b110 - Completion Data Credit
  • 3'b111 - Reserved
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