GTS AXI Streaming IP for PCI Express* User Guide: Agilex™ 5 and Agilex™ 3 FPGAs and SoCs

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ID 813754
Date 10/27/2025
Public
Document Table of Contents
Document Table of Contents x
1. Introduction 2. Features 3. Getting Started with GTS AXI Streaming IP 4. IP Architecture and Functional Description 5. IP Parameters 6. Interfaces and Signals 7. Registers 8. Document Revision History for the GTS AXI Streaming IP for PCI Express* User Guide: Agilex™ 5 and Agilex™ 3 FPGAs and SoCs A. Troubleshooting/Debugging B. PIPE Mode Simulation C. Implementation of Address Translation Services (ATS) in Endpoint Mode
1. Introduction x
1.1. About PCI Express* 1.2. Goal of the GTS AXI Streaming IP for PCI Express* User Guide 1.3. Example Use Models
2. Features x
2.1. Supported Features 2.2. Device Family Support 2.3. Release Information 2.4. Recommended FPGA Fabric Speed Grades 2.5. Resource Utilization 2.6. IP Core and Design Example Support Levels
3. Getting Started with GTS AXI Streaming IP x
3.1. Downloading and Installing Quartus® Prime Software 3.2. Configuring and Generating the GTS AXI Streaming IP 3.3. Configuring and Generating GTS System PLL Clocks IP 3.4. Configuring and Generating GTS Reset Sequencer IP 3.5. Instantiating and Connecting GTS AXI Streaming IP Interfaces (and Other IPs) 3.6. Simulating the GTS AXI Streaming IP Variant 3.7. Compiling the GTS AXI Streaming IP Variant
4. IP Architecture and Functional Description x
4.1. Clocking 4.2. Resets 4.3. PCIe* Hard IP 4.4. Hard IP Interface (IF) Adaptor 4.5. Interrupts 4.6. Transaction Ordering 4.7. TX Non-Posted Metering Requirement on Application 4.8. AXI4-Stream Interface 4.9. Tag Allocation 4.10. Power Management 4.11. Config Retry Status Enable 4.12. Hot-Plug 4.13. Configuration Space Extension 4.14. Page Request Service (EP only) 4.15. Precision Time Measurement (PTM) 4.16. Single Root I/O Virtualization (SR-IOV) 4.17. Transaction Layer Packet (TLP) Bypass Mode 4.18. Scalable IOV
4.1. Clocking x
4.1.1. Reference Clock 4.1.2. System PLL with HVIO Reference Clock
4.5. Interrupts x
4.5.1. Legacy Interrupt 4.5.2. Message Signaled Interrupts (MSI) 4.5.3. Message Signal Interrupt Extended (MSI-X)
4.8. AXI4-Stream Interface x
4.8.1. Header Format 4.8.2. Prefix Format 4.8.3. Function Number Format 4.8.4. BAR Number Format 4.8.5. Data and Header Packing Scheme
4.10. Power Management x
4.10.1. Endpoint D3 Entry 4.10.2. Endpoint L2 Exit
4.16. Single Root I/O Virtualization (SR-IOV) x
4.16.1. SR-IOV Implementation
4.17. Transaction Layer Packet (TLP) Bypass Mode x
4.17.1. AXI-Lite Usage for TLP Bypass Mode 4.17.2. Configuration TLP 4.17.3. Transmit Interface 4.17.4. Receive Interface 4.17.5. Malformed TLP 4.17.6. ECRC
5. IP Parameters x
5.1. System Settings 5.2. PCIe0/PCIe1 5.3. Diagnostics
5.2. PCIe0/PCIe1 x
5.2.1. Interfaces Port 0/Interfaces Port 1 5.2.2. PCIe0/PCIe1 Settings
5.2.1. Interfaces Port 0/Interfaces Port 1 x
5.2.1.1. AXI Interfaces 0/AXI Interface 1 Settings
5.2.2. PCIe0/PCIe1 Settings x
5.2.2.1. PCIe0/PCIe1 Configuration, Debug and Extension Options 5.2.2.2. PCIe0/PCIe1 Base Address Registers 5.2.2.3. PCIe0/PCIe1 Device Identification Registers 5.2.2.4. PCIe0/PCIe1 PCI Express / PCI Capabilities
5.2.2.4. PCIe0/PCIe1 PCI Express / PCI Capabilities x
5.2.2.4.1. PCIe0/PCIe1 Device 5.2.2.4.2. PCIe0/PCIe1 Link 5.2.2.4.3. PCIe0/PCIe1 Slot 5.2.2.4.4. PCIe0/PCIe1 Legacy Interrupt Pin Register 5.2.2.4.5. PCIe0/PCIe1 PTM 5.2.2.4.6. PCIe0/PCIe1 LTR 5.2.2.4.7. PCIe0/PCIe1 MSI 5.2.2.4.8. PCIe0/PCIe1 MSI-X 5.2.2.4.9. PCIe0/PCIe1 PASID 5.2.2.4.10. PCIe0/PCIe1 DEV SER 5.2.2.4.11. PCIe0/PCIe1 PRS 5.2.2.4.12. PCIe0/PCIe1 Power Management 5.2.2.4.13. PCIe0/PCIe1 VSEC 5.2.2.4.14. PCIe0/PCIe1 ATS 5.2.2.4.15. PCIe0/PCIe1 TPH 5.2.2.4.16. PCIe0/PCIe1 ACS 5.2.2.4.17. PCIe0/PCIe1 Hot-Plug 5.2.2.4.18. PCIe0/PCIe1 VIRTIO
5.2.2.4.10. PCIe0/PCIe1 DEV SER x
5.2.2.4.10.1. Implementing Device Serial Number (DSN) with Runtime Update Support
5.2.2.4.18. PCIe0/PCIe1 VIRTIO x
5.2.2.4.18.1. PCIe0/PCIe1 PF<n> VIRTIO STRUCTURES
6. Interfaces and Signals x
6.1. Overview 6.2. Clocks and Resets 6.3. AXI4-Stream Interfaces 6.4. Configuration Intercept Interface 6.5. Configuration Extension Bus (CEB) Interface 6.6. Control Shadow Interface 6.7. Transmit Flow Control Credit Interface 6.8. Completion Timeout Interface 6.9. Control and Status Register Responder Interface 6.10. Function Level Reset Interface 6.11. TLP Bypass Error Reporting Interface 6.12. Error Interface 6.13. VF Error Flag Interface 6.14. VIRTIO PCI* Configuration Access Interface 6.15. Precision Time Measurement (PTM) Interface 6.16. Serial Data Signals 6.17. Miscellaneous Signals
6.2. Clocks and Resets x
6.2.1. Interface Clock Signals 6.2.2. Interface Reset Signals
6.3. AXI4-Stream Interfaces x
6.3.1. AXI4-Stream Receive (RX) Interface 6.3.2. AXI4-Stream Transmit (TX) Interface
6.4. Configuration Intercept Interface x
6.4.1. Configuration Intercept Request Interface 6.4.2. Configuration Intercept Response Interface
6.5. Configuration Extension Bus (CEB) Interface x
6.5.1. Configuration Extension Bus Request Interface 6.5.2. Configuration Extension Bus Response Interface
6.10. Function Level Reset Interface x
6.10.1. Function Level Reset Received Interface 6.10.2. Function Level Reset Completion Interface
6.14. VIRTIO PCI* Configuration Access Interface x
6.14.1. VIRTIO PCI Configuration Access Request Interface 6.14.2. VIRTIO PCI Configuration Access Completion Interface
7. Registers x
7.1. Register Address Map 7.2. PCI Express* Configuration Space 7.3. HIP Port and Status Registers 7.4. Soft Register Address Map 7.5. Indirect Register Access 7.6. Virtual Function (VF) PCI Express* Configuration Space 7.7. Altera-Defined VSEC Capability Register
7.2. PCI Express* Configuration Space x
7.2.1. PCI Express* Configuration Header Registers 7.2.2. PCI Express* Capability Structures 7.2.3. Physical Layer 16.0 GT/s Extended Capability Structures
7.3. HIP Port and Status Registers x
7.3.1. Root Port Interrupt Registers 7.3.2. PTM Registers
7.4. Soft Register Address Map x
7.4.1. Control Registers 7.4.2. Debug Registers 7.4.3. Performance Monitor Registers
7.6. Virtual Function (VF) PCI Express* Configuration Space x
7.6.1. VF PCI-Compatible Configuration Space Header Type0 7.6.2. VF PCI Express* Capability Structure 7.6.3. VF Message Signal Interrupt Extended (MSI-X) Capability Structure 7.6.4. VF Alternative Routing ID (ARI) Capability Structure 7.6.5. VF TLP Processing Hints (TPH) Capability Structure 7.6.6. VF Address Translation Services (ATS) Capability Structure 7.6.7. VF Access Control Services (ACS) Capability Structure
7.6.1. VF PCI-Compatible Configuration Space Header Type0 x
7.6.1.1. Vendor ID and Device ID Registers 7.6.1.2. Command Registers 7.6.1.3. Status Registers 7.6.1.4. Revision ID and Class Code Register 7.6.1.5. BIST, Header Type, Latency Timer, and Cache Line Size Registers 7.6.1.6. Subsystem Vendor ID and Subsystem ID Register 7.6.1.7. Capabilities Pointer
7.6.2. VF PCI Express* Capability Structure x
7.6.2.1. PCI Express* Capability List Register 7.6.2.2. PCI Express* Device Capabilities Register 7.6.2.3. PCI Express* Device Control and Status Register 7.6.2.4. Link Capabilities Register 7.6.2.5. Link Control and Status Register 7.6.2.6. PCI Express* Device Capabilities 2 Register 7.6.2.7. PCI Express* Device Control and Status 2 Register 7.6.2.8. Link Capabilities 2 Register 7.6.2.9. Link Control and Status 2 Register
7.6.3. VF Message Signal Interrupt Extended (MSI-X) Capability Structure x
7.6.3.1. MSI-X Control Register 7.6.3.2. MSI-X Table Offset Register 7.6.3.3. MSI-X Pending Bit Array Register
7.6.4. VF Alternative Routing ID (ARI) Capability Structure x
7.6.4.1. ARI Enhanced Capability Header Register 7.6.4.2. ARI Capability and Control Registers
7.6.5. VF TLP Processing Hints (TPH) Capability Structure x
7.6.5.1. TPH Requester Enhanced Capability Header 7.6.5.2. TPH Requester Capability Register 7.6.5.3. TPH Requester Control Register
7.6.6. VF Address Translation Services (ATS) Capability Structure x
7.6.6.1. ATS Enhanced Capability Header 7.6.6.2. ATS Capability Register and Control Register
7.6.7. VF Access Control Services (ACS) Capability Structure x
7.6.7.1. ACS Extended Capability Header 7.6.7.2. ACS Capability and Control Register 7.6.7.3. Egress Control Vector
A. Troubleshooting/Debugging x
A.1. Hardware A.2. Debug Toolkit
A.1. Hardware x
A.1.1. Debugging Link Training Issues A.1.2. Debugging Data Transfer and Performance Issues
A.1.1. Debugging Link Training Issues x
A.1.1.1. Generic Tools and Utilities A.1.1.2. Signal Tap Logic Analyzer
A.2. Debug Toolkit x
A.2.1. Overview A.2.2. Enabling the Agilex™ 5 Debug Toolkit A.2.3. Launching the Agilex™ 5 Debug Toolkit A.2.4. Using the Agilex™ 5 Debug Toolkit A.2.5. Using the Agilex™ 5 Link Inspector
A.2.4. Using the Agilex™ 5 Debug Toolkit x
A.2.4.1. Main View A.2.4.2. Toolkit Parameters A.2.4.3. Channel Parameters A.2.4.4. Eye Viewer
A.2.4.2. Toolkit Parameters x
A.2.4.2.1. Agilex™ 5 Information A.2.4.2.2. Event Counter A.2.4.2.3. P0 Configuration Space
A.2.4.3. Channel Parameters x
A.2.4.3.1. General PHY A.2.4.3.2. TX Path A.2.4.3.3. RX Path
B. PIPE Mode Simulation x
B.1. PIPE Mode Interfaces
C. Implementation of Address Translation Services (ATS) in Endpoint Mode x
C.1. Sending Translated/Untranslated Requests C.2. Sending a Page Request Message from the Endpoint (EP) to the Root Complex (RC) C.3. Invalidating Requests/Completions
1. Introduction
2. Features
3. Getting Started with GTS AXI Streaming IP
4. IP Architecture and Functional Description
5. IP Parameters
6. Interfaces and Signals
7. Registers
8. Document Revision History for the GTS AXI Streaming IP for PCI Express* User Guide: Agilex™ 5 and Agilex™ 3 FPGAs and SoCs
A. Troubleshooting/Debugging
B. PIPE Mode Simulation
C. Implementation of Address Translation Services (ATS) in Endpoint Mode

4.1.2. System PLL with HVIO Reference Clock

The single-ended input reference clock pins in HVIO banks can be used as a secondary reference clock option to drive the System PLL. This is required for Agilex™ 3 and Agilex™ 5 devices with only one GTS transceiver bank on one side of the device. When you configure the GTS transceiver bank to run PCIe and non-PCIe channels, the transceiver reference clocks are used to drive the TX PLLs and CDRs of the PCIe and non-PCIe channels. There is no more transceiver reference clock available since there is only one GTS transceiver bank. If the PCIe link is deployed in open systems with the common reference clock architecture where the reference clock from the host is not guaranteed to be available before device configuration starts, you need to source the input reference clock from the HVIO bank to drive the PCIe system PLL.
Figure 14. HVIO Reference Clock to Drive System PLL in Common Reference Clock Architecture
For separate reference clock architectures, you can use the transceiver reference clock to drive the PCIe TX PLL, CDR, and the system PLL. In this case, you do not need to use the input reference clock from the HVIO bank.
Figure 15. Transceiver Reference Clock to Drive System PLL in Separate Reference Clock Architecture

The table below shows the HVIO reference clock pin options for the system PLL in each of the transceiver banks.

Table 15.  HVIO Reference Clock Pin Options
HVIO Bank GTS Bank L1A GTS Bank L1B 2 GTS Bank L1C2 GTS Bank R4A 2 GTS Bank R4B 2 GTS Bank R4C 2
5B SYSPLLREFCLK_L1A_0, SYSPLLREFCLK_L1A_1 SYSPLLREFCLK_L1B_0, SYSPLLREFCLK_L1B_1 SYSPLLREFCLK_L1C_0 N/A N/A N/A
6A N/A N/A N/A

SYSPLLREFCLK_R4A_0,

SYSPLLREFCLK_R4A_1

SYSPLLREFCLK_R4B_0,

SYSPLLREFCLK_R4B_1

 SYSPLLREFCLK_R4C_0
2 Not applicable to Agilex™ 3
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