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

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ID 790711
Date 2/12/2024
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Document Table of Contents
Document Table of Contents x
1. Introduction 2. Features 3. Getting Started with the AXI Streaming Intel® FPGA IP for PCI Express* 4. IP Architecture and Functional Description 5. AXI Streaming Intel® FPGA IP for PCI Express* Parameters 6. Interfaces and Signals 7. Register Descriptions 8. Document Revision History for the AXI Streaming Intel® FPGA IP for PCI Express* User Guide A. Specifications B. Simulating the Design Example
1. Introduction x
1.1. Goal of the AXI Streaming Intel® FPGA IP for PCI Express* User Guide 1.2. Intended Audience for the AXI Streaming Intel® FPGA IP for PCI Express* User Guide 1.3. What is PCI Express* ? 1.4. What are the Intel® FPGA IPs for PCI Express* ? 1.5. What is the AXI Streaming Intel® FPGA IP for PCI Express* ? 1.6. Example Use Models 1.7. Design Flow Requirements
1.7. Design Flow Requirements x
1.7.1. Design Software 1.7.2. Hardware
2. Features x
2.1. Supported Features 2.2. Device Family Support 2.3. Performance
3. Getting Started with the AXI Streaming Intel® FPGA IP for PCI Express* x
3.1. Download and Install Quartus Software 3.2. Obtain and Install Intel FPGA IPs and Licenses 3.3. Configure and Generate the AXI Streaming Intel® FPGA IP for PCI Express* 3.4. Instantiate and Connect the AXI Streaming Intel® FPGA IP for PCI Express* Interfaces 3.5. Simulate the AXI Streaming Intel® FPGA IP for PCI Express* IP Variant 3.6. Compile the AXI Streaming Intel® FPGA IP for PCI Express* IP Variant 3.7. Software Drivers for AXI Streaming Intel® FPGA IP for PCI Express* IP Variant 3.8. Build the Application for the AXI Streaming Intel® FPGA IP for PCI Express* IP Variant 3.9. Verification with the AXI Streaming Intel® FPGA IP for PCI Express* IP Variant 3.10. Debugging with the AXI Streaming Intel® FPGA IP for PCI Express* IP Variant
3.4. Instantiate and Connect the AXI Streaming Intel® FPGA IP for PCI Express* Interfaces x
3.4.1. Clocking and Resets 3.4.2. Application Packet Datapath 3.4.3. Enabling Additional Features 3.4.4. Enabling Optional Interfaces
3.5. Simulate the AXI Streaming Intel® FPGA IP for PCI Express* IP Variant x
3.5.1. Simulating the Design Example
3.5.1. Simulating the Design Example x
3.5.1.1. Steps to Run Simulations
3.5.1.1. Steps to Run Simulations x
3.5.1.1.1. VCS* Simulator
3.7. Software Drivers for AXI Streaming Intel® FPGA IP for PCI Express* IP Variant x
3.7.1. Installing the Linux Kernel Driver
3.8. Build the Application for the AXI Streaming Intel® FPGA IP for PCI Express* IP Variant x
3.8.1. Running the Design Example
3.8.1. Running the Design Example x
3.8.1.1. Running the PIO Design Example
3.10. Debugging with the AXI Streaming Intel® FPGA IP for PCI Express* IP Variant x
3.10.1. Debugging Link Training Issues 3.10.2. Debugging Data Transfer and Performance Issues
3.10.1. Debugging Link Training Issues x
3.10.1.1. Operating System Tools and Utilities 3.10.1.2. Signal Tap Logic Analyzer 3.10.1.3. Additional Debug Tools
3.10.2. Debugging Data Transfer and Performance Issues x
3.10.2.1. Advanced Error Reporting (AER) 3.10.2.2. Second-Level Debug Tools
4. IP Architecture and Functional Description x
4.1. Clocks and Resets 4.2. PCIe Hard IP (HIP) 4.3. HIP Interface (IF) Adaptor 4.4. Application Error Reporting 4.5. Debug Toolkit and Hard IP (HIP) Reconfiguration Interface 4.6. Configuration Space Extension 4.7. Control Shadow 4.8. Configuration Intercept Interface 4.9. Power Management 4.10. Legacy Interrupt 4.11. Credit Handling 4.12. Completion Timeout 4.13. Transaction Ordering 4.14. Page Request Service (PRS) Events 4.15. TX Non-Posted Metering Requirement on Application 4.16. MSI Pending 4.17. D-State Status 4.18. Configuration Retry Status Enable 4.19. AXI-Streaming Interface 4.20. Precision Time Measurement (PTM) [F/R-Tiles Only]
5. AXI Streaming Intel® FPGA IP for PCI Express* Parameters x
5.1. Parameter Editor Parameters
6. Interfaces and Signals x
6.1. Overview 6.2. Clocks and Resets 6.3. Application Packet Interface 6.4. Configuration Extension Bus Interface 6.5. Configuration Intercept Interface 6.6. Function Level Reset Interface 6.7. Control Shadow Interface (st_ctrlshadow) 6.8. Completion Timeout Interface (st_cplto) 6.9. Miscellaneous Signals 6.10. Control and Status Register Responder Interface (lite_csr) 6.11. VF Error Flag Interface (vf_err/sent_vfnonfatalmsg) 6.12. VIRTIO PCI* Configuration Access Interface 6.13. Serial Data Signals
6.2. Clocks and Resets x
6.2.1. Interface Clock Signals 6.2.2. Interface Reset Signals
6.3. Application Packet Interface x
6.3.1. Header Format 6.3.2. Prefix Format 6.3.3. Function Number Format 6.3.4. BAR Number Format 6.3.5. Data and Header Packing Schemes 6.3.6. Application Packet Transmit Interface (st_tx) 6.3.7. Application Packet Receive Interface (st_rx) 6.3.8. Flow Control Credit Handling
6.3.5. Data and Header Packing Schemes x
6.3.5.1. HIP Native Mode Packing 6.3.5.2. Compact Packing 6.3.5.3. Simple Packing
6.3.5.1. HIP Native Mode Packing x
6.3.5.1.1. Application Logic Guidelines for the AXI Streaming TX Interface in HIP Native Mode (R-Tile) 6.3.5.1.2. Application Logic Guidelines for the AXI Streaming RX Interface in HIP Native Mode
6.3.5.2. Compact Packing x
6.3.5.2.1. Application Logic Guidelines for the AXI Streaming TX Interface in Compact Mode (P/R-Tiles) 6.3.5.2.2. Application Logic Guidelines for the AXI Streaming RX Interface in Compact Mode (P/R-Tiles)
6.3.5.3. Simple Packing x
6.3.5.3.1. Application Logic Guidelines for the AXI Streaming TX Interface in Simple Mode (P/R-Tiles) 6.3.5.3.2. Application Logic Guidelines for the AXI Streaming RX Interface in Simple Mode (P/R-Tiles)
6.3.8. Flow Control Credit Handling x
6.3.8.1. Application Transmit Flow Control Credit Interface (st_txcrdt) 6.3.8.2. Application Receive Flow Control Credit Interface (st_rxcrdt) (R-Tile Only)
6.4. Configuration Extension Bus Interface x
6.4.1. Configuration Extension Bus Request Interface (st_cebreq) 6.4.2. Configuration Extension Bus Response Interface (st_cebresp)
6.5. Configuration Intercept Interface x
6.5.1. Configuration Intercept Request Interface (st_ciireq) 6.5.2. Configuration Intercept Response Interface (st_ciiresp)
6.6. Function Level Reset Interface x
6.6.1. Function Level Reset Received Interface (st_flrrcvd) 6.6.2. Function Level Reset Completion Interface (st_flrcmpl)
6.12. VIRTIO PCI* Configuration Access Interface x
6.12.1. VIRTIO PCI* Config Access Request Interface (st_virtio_pcicfgreq) 6.12.2. VIRTIO PCI* Config Access Completion Interface (st_virtio_pcicfgcmpl)
7. Register Descriptions x
7.1. Register Address Map 7.2. PCIe Configuration Space 7.3. AXI Streaming Intel® FPGA IP for PCI Express* Soft Register Address Map
7.2. PCIe Configuration Space x
7.2.1. PCIe Configuration Space Registers
7.3. AXI Streaming Intel® FPGA IP for PCI Express* Soft Register Address Map x
7.3.1. AXI Streaming Intel® FPGA IP for PCI Express* Control Registers 7.3.2. IP Debug Registers 7.3.3. IP Performance Monitor Registers
7.3.1. AXI Streaming Intel® FPGA IP for PCI Express* Control Registers x
7.3.1.1. AXI Streaming Intel® FPGA IP for PCI Express* Version 7.3.1.2. AXI Streaming Intel® FPGA IP for PCI Express* Features 7.3.1.3. AXI Streaming Intel® FPGA IP for PCI Express* Interface Attributes 7.3.1.4. ERROR GEN CTRL 7.3.1.5. ERROR GEN ATTR 7.3.1.6. ERROR TLP Header DW0-3 7.3.1.7. ERROR TLP Prefix 7.3.1.8. HOT PLUG GEN CTRL 7.3.1.9. POWER MANAGEMENT CTRL 7.3.1.10. LEGACY INTERRUPT CTRL 7.3.1.11. CFG REG IA CTRL 7.3.1.12. CFG REG IA FN NUM 7.3.1.13. CFG REG IA WRDATA 7.3.1.14. CFG REG IA RDDATA 7.3.1.15. PRS CTRL 7.3.1.16. MSI PENDING CTRL 7.3.1.17. MSI PENDING 7.3.1.18. D-STATE STS 7.3.1.19. CFG RETRY CTRL
7.3.2. IP Debug Registers x
7.3.2.1. HIP Status 7.3.2.2. HIP BP CYCLES 7.3.2.3. HIA BP CYCLES 7.3.2.4. APP BP CYCLES 7.3.2.5. HIA RX BP CYCLES
7.3.3. IP Performance Monitor Registers x
7.3.3.1. PERFMON CTRL 7.3.3.2. TX MRD TLP 7.3.3.3. TX MWR TLP 7.3.3.4. TX MSG TLP 7.3.3.5. TX CFGWR TLP 7.3.3.6. TX CFGRD TLP 7.3.3.7. RX MRD TLP 7.3.3.8. RX MWR TLP 7.3.3.9. RX MSG TLP 7.3.3.10. RX CFGWR TLP 7.3.3.11. RX CFGRD TLP 7.3.3.12. TX MEM DATA 7.3.3.13. TX CPL DATA 7.3.3.14. RX MEM DATA 7.3.3.15. RX CPL DATA
A. Specifications x
A.1. P-Tile Specifications A.2. F-Tile Specifications A.3. R-Tile Specifications
A.1. P-Tile Specifications x
A.1.1. P-Tile Completion Buffer Size A.1.2. Power Management A.1.3. MSI and MSI-X
A.2. F-Tile Specifications x
A.2.1. F-Tile Completion Buffer Size A.2.2. Power Management
A.3. R-Tile Specifications x
A.3.1. R-Tile Completion Buffer Size A.3.2. Power Management A.3.3. MSI and MSI-X
B. Simulating the Design Example x
B.1. Testbench
B.1. Testbench x
B.1.1. Testbench Modules B.1.2. Test Driver Module B.1.3. PIO Design Example Testbench B.1.4. Root Port BFM
1. Introduction
2. Features
3. Getting Started with the AXI Streaming Intel® FPGA IP for PCI Express*
4. IP Architecture and Functional Description
5. AXI Streaming Intel® FPGA IP for PCI Express* Parameters
6. Interfaces and Signals
7. Register Descriptions
8. Document Revision History for the AXI Streaming Intel® FPGA IP for PCI Express* User Guide
A. Specifications
B. Simulating the Design Example

6.7. Control Shadow Interface (st_ctrlshadow)

The control shadow interface is used to bring out the settings of the various configuration register fields of the function. These fields are often required in designing the control path of the application layer logic.

The application logic decodes information provided on this interface to create a shadow copy. The interface provides update to primary control signals only. The application logic must read extra information required through lite_csr interface by reading configuration register of interest. The sections below explain additional information required by application.

Bus Master Enable

The application logic requires the BME information to determine if it can generate request for a particular function. Each function in the application logic cannot generate bus master requests unless its corresponding BME is set. The application logic monitors control shadow interface for BME event for this purpose. Since PCIe* SS does not autonomously generate bus master request by itself, it will not qualify the transmit path with BME settings and solely relies on application.

MSI Enable

The application logic requires MSI Address and MSI Data information from MSI capability to generate MSI interrupt. The application logic monitors control shadow interface for MSI Enable event to read this additional information from MSI capability.

VF Enable

The Virtual Function in application logic cannot generate any traffic unless they are enabled by HOST. The number of VFs enabled can be different than number of VFs advertised as initial VFs. The application logic can find number of VFs visible by reading NumVFs register in SRIOV capability. The read of this register must be triggered after VF Enable bit is set by HOST.

TPH Req Enable

The function can support all operational modes of TPH, no ST mode, interrupt vector mode or device specific mode. The HOST communicates mode of operation by writing ST Mode Select bits in TPH requester control register. The application reads this register and generates traffic only when TPH requester enable bit is set.

ATS Enable

The function can read Smallest Translation Unit field from ATS control register when ATS enable bit is set.

Table 50.  Control Shadow Interface
Signal Name Direction Clock Domain Description
ss_app_st_ctrlshadow_tvalid Output axi_lite_clk The IP asserts this output for one clock cycle when there is an update to the register fields being monitored, because of a Configuration Write performed by the Root Comple.g., The user can copy the new settings of the register fields from the tdata bus.
ss_app_st_ctrlshadow_tdata[39:0] Output axi_lite_clk

When app_ctrl_shadow_tvalid has been asserted, this output provides the current settings of the register fields of the associated Function.

[2:0] - Identifies the physical function Number of configuration register

[13:3] - Identifies the virtual function Number of configuration register

[14] - Indicates information is for Virtual Function implemented in slot's physical function

[19:15] - Identifies the slot Number of configuration register

[20] - Bus Master Enable

[21] - MSI-X Mask

[22] - MSI-X Enable

[23] - Mem Space Enable

[24] - ExpRom Enable

[25] - TPH Req Enable

[26] - ATS Enable

[27] - MSI Enable

[28] - MSI Mask

[29] - Extended Tag

[30] - 10 Bit Tag Req Enable

[31] - PTM Enable

[34:32] - MPS Size

[37:35] - MRRS Size

[38] - VF Enable

[39] - Page Request Enable

ATS Enable Timing Diagram

The following figure shows output on the Control Shadow interface when there is an update to the control shadow bits in the HIP configuration register.

Figure 44. ATS Enable Timing Diagram
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