GTS AXI Streaming Intel® FPGA IP for PCI Express* User Guide

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ID 813754
Date 8/07/2024
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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 for E-Series FPGA 6. IP Parameters for D-Series FPGAs 7. Interfaces and Signals 8. Registers 9. Document Revision History for the GTS AXI Streaming Intel® FPGA IP for PCI Express* User Guide A. Troubleshooting/Debugging B. PIPE Mode Simulation
1. Introduction x
1.1. About PCI Express* 1.2. Goal of the GTS AXI Streaming Intel® FPGA IP for PCI Express* User Guide 1.3. Example Use Models
2. Features x
2.1. Supported Features 2.2. IP Support Status 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 Intel® FPGA IP 3.4. Configuring and Generating GTS Reset Sequencer Intel® FPGA 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. Precision Time Measurement (PTM) 4.11. Single Root I/O Virtualization (SR-IOV) 4.12. Transaction Layer Packet (TLP) Bypass Mode 4.13. Scalable IOV
4.1. Clocking x
4.1.1. 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
4.11. Single Root I/O Virtualization (SR-IOV) x
4.11.1. SR-IOV Implementation
4.12. Transaction Layer Packet (TLP) Bypass Mode x
4.12.1. AXI-Lite Usage for TLP Bypass Mode 4.12.2. Configuration TLP 4.12.3. Transmit Interface 4.12.4. Receive Interface 4.12.5. Malformed TLP 4.12.6. ECRC
5. IP Parameters for E-Series FPGA x
5.1. PCIe* Interfaces 0 Settings 5.2. AXI Interfaces 0 Settings 5.3. PCIe* 0 Settings
5.3. PCIe* 0 Settings x
5.3.1. PCIe* 0 Base Address Registers 5.3.2. PCIe* 0 Device Identification Registers 5.3.3. PCIe* 0 PCI Express* / PCI Capabilities
6. IP Parameters for D-Series FPGAs x
6.1. PCIe Interface 0 Settings 6.2. AXI Interfaces 0 Settings 6.3. PCIe0/PCIe1 Settings
6.3. PCIe0/PCIe1 Settings x
6.3.1. PCIe0/PCIe1 Base Address Registers 6.3.2. PCIe0/PCIe1 Device Identification Registers 6.3.3. PCIe0/PCIe1 PCI Express / PCI Capabilities
7. Interfaces and Signals x
7.1. Overview 7.2. Clocks and Resets 7.3. AXI4-Stream Interfaces 7.4. Configuration Intercept Interface 7.5. Control Shadow Interface 7.6. Transmit Flow Control Credit Interface 7.7. Completion Timeout Interface 7.8. Control and Status Register Responder Interface 7.9. Function Level Reset Interface 7.10. TLP Bypass Error Reporting Interface 7.11. VF Error Flag Interface 7.12. Precision Time Measurement (PTM) Interface 7.13. Serial Data Signals 7.14. Miscellaneous Signals
7.2. Clocks and Resets x
7.2.1. Interface Clock Signals 7.2.2. Interface Reset Signals
7.3. AXI4-Stream Interfaces x
7.3.1. AXI4-Stream Receive (RX) Interface 7.3.2. AXI4-Stream Transmit (TX) Interface
7.4. Configuration Intercept Interface x
7.4.1. Configuration Intercept Request Interface 7.4.2. Configuration Intercept Response Interface
7.9. Function Level Reset Interface x
7.9.1. Function Level Reset Received Interface 7.9.2. Function Level Reset Completion Interface
8. Registers x
8.1. Register Address Map 8.2. PCI Express* Configuration Space 8.3. HIP Port and Status Registers 8.4. Soft Register Address Map 8.5. Indirect Register Access 8.6. Virtual Function (VF) PCI Express* Configuration Space 8.7. Intel-Defined VSEC Capability Register
8.2. PCI Express* Configuration Space x
8.2.1. PCI Express* Configuration Header Registers 8.2.2. PCI Express* Capability Structures 8.2.3. Physical Layer 16.0 GT/s Extended Capability Structures
8.3. HIP Port and Status Registers x
8.3.1. Root Port Interrupt Registers 8.3.2. PTM Registers
8.4. Soft Register Address Map x
8.4.1. Control Registers 8.4.2. Debug Registers 8.4.3. Performance Monitor Registers
8.6. Virtual Function (VF) PCI Express* Configuration Space x
8.6.1. VF PCI-Compatible Configuration Space Header Type0 8.6.2. VF PCI Express* Capability Structure 8.6.3. VF Message Signal Interrupt Extended (MSI-X) Capability Structure 8.6.4. VF Alternative Routing ID (ARI) Capability Structure 8.6.5. VF TLP Processing Hints (TPH) Capability Structure 8.6.6. VF Address Translation Services (ATS) Capability Structure 8.6.7. VF Access Control Services (ACS) Capability Structure
8.6.1. VF PCI-Compatible Configuration Space Header Type0 x
8.6.1.1. Vendor ID and Device ID Registers 8.6.1.2. Command Registers 8.6.1.3. Status Registers 8.6.1.4. Revision ID and Class Code Register 8.6.1.5. BIST, Header Type, Latency Timer, and Cache Line Size Registers 8.6.1.6. Subsystem Vendor ID and Subsystem ID Register 8.6.1.7. Capabilities Pointer
8.6.2. VF PCI Express* Capability Structure x
8.6.2.1. PCI Express* Capability List Register 8.6.2.2. PCI Express* Device Capabilities Register 8.6.2.3. PCI Express* Device Control and Status Register 8.6.2.4. Link Capabilities Register 8.6.2.5. Link Control and Status Register 8.6.2.6. PCI Express* Device Capabilities 2 Register 8.6.2.7. PCI Express* Device Control and Status 2 Register 8.6.2.8. Link Capabilities 2 Register 8.6.2.9. Link Control and Status 2 Register
8.6.3. VF Message Signal Interrupt Extended (MSI-X) Capability Structure x
8.6.3.1. MSI-X Control Register 8.6.3.2. MSI-X Table Offset Register 8.6.3.3. MSI-X Pending Bit Array Register
8.6.4. VF Alternative Routing ID (ARI) Capability Structure x
8.6.4.1. ARI Enhanced Capability Header Register 8.6.4.2. ARI Capability and Control Registers
8.6.5. VF TLP Processing Hints (TPH) Capability Structure x
8.6.5.1. TPH Requester Enhanced Capability Header 8.6.5.2. TPH Requester Capability Register 8.6.5.3. TPH Requester Control Register
8.6.6. VF Address Translation Services (ATS) Capability Structure x
8.6.6.1. ATS Enhanced Capability Header 8.6.6.2. ATS Capability Register and Control Register
8.6.7. VF Access Control Services (ACS) Capability Structure x
8.6.7.1. ACS Extended Capability Header 8.6.7.2. ACS Capability and Control Register 8.6.7.3. 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
1. Introduction
2. Features
3. Getting Started with GTS AXI Streaming IP
4. IP Architecture and Functional Description
5. IP Parameters for E-Series FPGA
6. IP Parameters for D-Series FPGAs
7. Interfaces and Signals
8. Registers
9. Document Revision History for the GTS AXI Streaming Intel® FPGA IP for PCI Express* User Guide
A. Troubleshooting/Debugging
B. PIPE Mode Simulation

7.3.2. AXI4-Stream Transmit (TX) Interface

The outbound packet towards the link from application side is transmitted through this interface. The interface supports data widths of 16 bytes (128 bits), 32 bytes (256 bits), and 64 bytes (512 bits). The TLP header, function number of TLP, and prefix signals are sent in line with data.

Table 42.   AXI4-Stream TX Interfacen = 0 or 1, p0 = port 0, and p1 = port 1
Note: Port 1 is only available in D-Series FPGAs
Signal Name Direction Clock Domain Description
p<n>_app_ss_st_tx_tvalid Input p<n>_axi_st_clk Indicates that the remote transmit interface is driving a valid transfer.
p<n>_ss_app_st_tx_tready Output p<n>_axi_st_clk Indicates that the receive interface can accept a transfer in the current cycle.
p<n>_app_ss_st_tx_tdata[(a-1):0] Input p<n>_axi_st_clk Data bus used to provide the data that is passing across the interface.
p<n>_app_ss_st_tx_tkeep[(a/8-1):0] 2 Input p<n>_axi_st_clk

A byte qualifier used to indicate whether the content of the associated byte is valid.

The invalid bytes are allowed only during p<n>_app_axi_st_tx_tlast cycle.

The sparse p<n>_app_axi_st_tx_tkeep is not allowed.

p<n>_app_ss_st_tx_tlast Input p<n>_axi_st_clk Indicates end of data/command transmission.

The timing diagrams in the following sections are for the simple packing scheme only.

The following figure shows timing diagram for command with data. The completion, memory write, messages, and the configuration write commands fall under command with data category.

The first command transfers a payload of 64 Bytes. The receive interface is ready to accept command at clock cycle 1 but the transmit interface does not have any command to transfer in that same cycle. The transmit interface starts the transfer in the next cycle.

The second command transfers a payload of 128 Bytes. Here, the receive interface is not ready to accept command when the transmit interface has asserted valid. The transmit interface holds information on the bus till it observes ready from the receive interface.

Figure 51.  AXI4-Stream TX Interface—Simple Packing Scheme Timing Diagram (Command With Data)

The following figure shows timing diagram for command with data followed by command without data. The completion, memory write, messages and configuration write commands fall under command with data category. The memory read, configuration read, messages without data and completion without data fall under command without data category.

The first command transfers a payload of 64 Bytes. The receive interface is ready to accept command at clock cycle 1 but the transmit interface does not have any command to transfer in that same cycle. The transmit interface starts the transfer in the next cycle.

The second command is a command without data. Here, the receive interface is not ready to accept command when the transmit interface has asserted valid. The transmit interface holds information on the bus till it observes ready from the receive interface.

Figure 52.  AXI4-Stream TX Interface—Simple Packing Scheme Timing Diagram (Command With Data and Command)

The first command transfers the payload of 67 Bytes.

Note: tkeep during tlast has partial ones, but these ones are contiguous, sparse tkeep is not allowed. The partial tkeep is allowed only on tlast cycle.

The second command is a command without data.

Figure 53.  AXI4-Stream TX Interface—Simple Packing Scheme Timing Diagram (Back-to-Back Commands With and Without Data)
2 For the recommended a value, refer to the Variables Used in the Bus Indice table. 2
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