P-Tile Avalon® Streaming FPGA IP for PCI Express* User Guide

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ID 683059
Date 8/11/2025
Public
Document Table of Contents
Document Table of Contents x
1. About the P-tile Avalon® FPGA IPs for PCI Express 2. IP Architecture and Functional Description 3. Advanced Features 4. Interfaces 5. Parameters 6. Testbench 7. Troubleshooting/Debugging 8. P-tile Avalon® Streaming FPGA IP for PCI Express* User Guide Archives 9. Document Revision History for the P-Tile Avalon® Streaming FPGA IP for PCI Express* User Guide A. Configuration Space Registers B. Root Port Enumeration C. Implementation of Address Translation Services (ATS) in Endpoint Mode D. Packets Forwarded to the User Application in TLP Bypass Mode E. Using the Avery BFM for Intel P-Tile PCI Express Gen4 x16 Simulations F. Bifurcated Endpoint Support for Independent Warm Resets G. Margin Masks for the P-Tile Avalon Streaming FPGA IP for PCI Express
1. About the P-tile Avalon® FPGA IPs for PCI Express x
1.1. Overview 1.2. Features 1.3. Release Information 1.4. Device Family Support 1.5. Performance and Resource Utilization 1.6. IP Core and Design Example Support Levels
1.1. Overview x
1.1.1. Standards and Specifications Compliance
2. IP Architecture and Functional Description x
2.1. Architecture 2.2. Functional Description
2.1. Architecture x
2.1.1. Clock Domains 2.1.2. Refclk 2.1.3. Reset
2.1.3. Reset x
2.1.3.1. Independent PERST
2.2. Functional Description x
2.2.1. PMA/PCS 2.2.2. Data Link Layer Overview 2.2.3. Transaction Layer Overview
3. Advanced Features x
3.1. PCIe* Port Bifurcation and PHY Channel Mapping 3.2. Virtualization Support 3.3. TLP Bypass Mode
3.2. Virtualization Support x
3.2.1. SR-IOV Support 3.2.2. VirtIO Support
3.2.1. SR-IOV Support x
3.2.1.1. SR-IOV Supported Features List 3.2.1.2. Implementation 3.2.1.3. VF to PF Mapping 3.2.1.4. Function Level Reset (FLR)
3.2.1.2. Implementation x
3.2.1.2.1. VF Error Flag Interface (for x16/x8 Cores Only)
3.2.2. VirtIO Support x
3.2.2.1. VirtIO Supported Features List 3.2.2.2. Overview 3.2.2.3. Parameters 3.2.2.4. VirtIO PCI Configuration Access Interface 3.2.2.5. Registers
3.2.2.5. Registers x
3.2.2.5.1. VirtIO Common Configuration Capability Register (Address: 0x012) 3.2.2.5.2. VirtIO Common Configuration BAR Indicator Register (Address: 0x013) 3.2.2.5.3. VirtIO Common Configuration BAR Offset Register (Address: 0x014) 3.2.2.5.4. VirtIO Common Configuration Structure Length Register (Address 0x015) 3.2.2.5.5. VirtIO Notifications Capability Register (Address: 0x016) 3.2.2.5.6. VirtIO Notifications BAR Indicator Register (Address: 0x017) 3.2.2.5.7. VirtIO Notifications BAR Offset Register (Address: 0x018) 3.2.2.5.8. VirtIO Notifications Structure Length Register (Address: 0x019) 3.2.2.5.9. VirtIO Notifications Notify Off Multiplier Register (Address: 0x01A) 3.2.2.5.10. VirtIO ISR Status Capability Register (Address: 0x02F) 3.2.2.5.11. VirtIO ISR Status BAR Indicator Register (Address: 0x030) 3.2.2.5.12. VirtIO ISR Status BAR Offset Register (Address: 0x031) 3.2.2.5.13. VirtIO ISR Status Structure Length Register (Address: 0x032) 3.2.2.5.14. VirtIO Device Specific Capability Register (Address: 0x033) 3.2.2.5.15. VirtIO Device Specific BAR Indicator Register (Address: 0x034) 3.2.2.5.16. VirtIO Device Specific BAR Offset Register (Address 0x035 ) 3.2.2.5.17. VirtIO Device Specific Structure Length Register (Address: 0x036) 3.2.2.5.18. VirtIO PCI Configuration Access Capability Register (Address: 0x037) 3.2.2.5.19. VirtIO PCI Configuration Access BAR Indicator Register (Address: 0x038) 3.2.2.5.20. VirtIO PCI Configuration Access BAR Offset Register (Address: 0x039) 3.2.2.5.21. VirtIO PCI Configuration Access Structure Length Register (Address: 0x03A) 3.2.2.5.22. VirtIO PCI Configuration Access Data Register (Address: 0x03B)
3.3. TLP Bypass Mode x
3.3.1. Overview 3.3.2. Register Settings for the TLP Bypass Mode 3.3.3. User Avalon® -MM Interface 3.3.4. Avalon® -ST Interface
3.3.2. Register Settings for the TLP Bypass Mode x
3.3.2.1. TLPBYPASS_ERR_EN (Address 0x104194) 3.3.2.2. TLPBYPASS_ERR_STATUS (Address 0x104190)
3.3.4. Avalon® -ST Interface x
3.3.4.1. Configuration TLP 3.3.4.2. Transmit Interface 3.3.4.3. Receive Interface 3.3.4.4. Malformed TLP 3.3.4.5. ECRC
4. Interfaces x
4.1. Overview 4.2. Clocks and Resets 4.3. Serial Data Interface 4.4. Avalon-ST Interface 4.5. Hard IP Status Interface 4.6. Interrupt Interface 4.7. Error Interface 4.8. Hot Plug Interface (RP Only) 4.9. Power Management Interface 4.10. Configuration Output Interface 4.11. Configuration Intercept Interface (EP Only) 4.12. Hard IP Reconfiguration Interface 4.13. PHY Reconfiguration Interface 4.14. Page Request Service (PRS) Interface (EP Only)
4.2. Clocks and Resets x
4.2.1. Interface Clock Signals 4.2.2. Resets
4.2.2. Resets x
4.2.2.1. Interface Reset Signals 4.2.2.2. Function-Level Reset (FLR) Interface (EP Only)
4.4. Avalon-ST Interface x
4.4.1. TLP Header and Data Alignment for the Avalon-ST RX and TX Interfaces 4.4.2. Avalon® -ST RX Interface 4.4.3. Avalon® -ST RX Interface rx_st_ready Behavior 4.4.4. RX Flow Control Interface 4.4.5. Avalon® -ST TX Interface 4.4.6. Avalon® -ST TX Interface tx_st_ready Behavior 4.4.7. TX Flow Control Interface 4.4.8. Tag Allocation
4.4.8. Tag Allocation x
4.4.8.1. Completion Buffer Size
4.6. Interrupt Interface x
4.6.1. Legacy Interrupts 4.6.2. MSI 4.6.3. MSI-X
4.6.3. MSI-X x
4.6.3.1. Implementing MSI-X Interrupts
4.7. Error Interface x
4.7.1. Completion Timeout Interface 4.7.2. VF Error Flags Interface
4.12. Hard IP Reconfiguration Interface x
4.12.1. Address Map for the User Avalon-MM Interface 4.12.2. Configuration Registers Access
4.12.1. Address Map for the User Avalon-MM Interface x
4.12.1.1. User Avalon-MM Control Register (Offset 0x104068)
4.12.2. Configuration Registers Access x
4.12.2.1. Using Direct User Avalon-MM Interface (Byte Access) 4.12.2.2. Using the Debug Register Interface Access (Dword Access)
5. Parameters x
5.1. Top-Level Settings 5.2. Core Parameters
5.2. Core Parameters x
5.2.1. Avalon® Parameters 5.2.2. Base Address Registers 5.2.3. PCI Express and PCI Capabilities Parameters 5.2.4. Device Identification Registers 5.2.5. Configuration, Debug and Extension Options
5.2.3. PCI Express and PCI Capabilities Parameters x
5.2.3.1. Device Capabilities 5.2.3.2. VirtIO Parameters 5.2.3.3. Link Capabilities 5.2.3.4. Legacy Interrupt Pin Register 5.2.3.5. MSI Capabilities 5.2.3.6. MSI-X Capabilities 5.2.3.7. Slot Capabilities 5.2.3.8. Latency Tolerance Reporting (LTR) 5.2.3.9. Process Address Space ID (PASID) 5.2.3.10. Device Serial Number Capability 5.2.3.11. Page Request Service (PRS) 5.2.3.12. Access Control Service (ACS) Capabilities 5.2.3.13. Power Management 5.2.3.14. Vendor Specific Extended Capability (VSEC) Registers 5.2.3.15. TLP Processing Hints (TPH) 5.2.3.16. Address Translation Services (ATS) Capabilities
5.2.3.1. Device Capabilities x
5.2.3.1.1. Multifunction and SR-IOV System Parameters
6. Testbench x
6.1. Endpoint Testbench 6.2. Test Driver Module 6.3. Root Port BFM
6.3. Root Port BFM x
6.3.1. BFM Memory Map 6.3.2. Configuration Space Bus and Device Numbering 6.3.3. Configuration of Root Port and Endpoint 6.3.4. Issuing Read and Write Transactions to the Application Layer 6.3.5. BFM Procedures and Functions
6.3.5. BFM Procedures and Functions x
6.3.5.1. ebfm_barwr Procedure 6.3.5.2. ebfm_barwr_imm Procedure 6.3.5.3. ebfm_barrd_wait Procedure 6.3.5.4. ebfm_barrd_nowt Procedure 6.3.5.5. ebfm_cfgwr_imm_wait Procedure 6.3.5.6. ebfm_cfgwr_imm_nowt Procedure 6.3.5.7. ebfm_cfgrd_wait Procedure 6.3.5.8. ebfm_cfgrd_nowt Procedure 6.3.5.9. BFM Configuration Procedures 6.3.5.10. BFM Shared Memory Access Procedures 6.3.5.11. BFM Log and Message Procedures 6.3.5.12. Verilog HDL Formatting Functions
6.3.5.9. BFM Configuration Procedures x
6.3.5.9.1. ebfm_cfg_rp_ep Procedure 6.3.5.9.2. ebfm_cfg_decode_bar Procedure
6.3.5.10. BFM Shared Memory Access Procedures x
6.3.5.10.1. Shared Memory Constants 6.3.5.10.2. shmem_write Task 6.3.5.10.3. shmem_read Function 6.3.5.10.4. shmem_display Verilog HDL Function 6.3.5.10.5. shmem_fill Procedure 6.3.5.10.6. shmem_chk_ok Function
6.3.5.11. BFM Log and Message Procedures x
6.3.5.11.1. ebfm_display Verilog HDL Function 6.3.5.11.2. ebfm_log_stop_sim Verilog HDL Function 6.3.5.11.3. ebfm_log_set_suppressed_msg_mask Task 6.3.5.11.4. ebfm_log_set_stop_on_msg_mask Verilog HDL Task 6.3.5.11.5. ebfm_log_open Verilog HDL Function 6.3.5.11.6. ebfm_log_close Verilog HDL Function
6.3.5.12. Verilog HDL Formatting Functions x
6.3.5.12.1. himage1 6.3.5.12.2. himage2 6.3.5.12.3. himage4 6.3.5.12.4. himage8 6.3.5.12.5. himage16 6.3.5.12.6. dimage1 6.3.5.12.7. dimage2 6.3.5.12.8. dimage3 6.3.5.12.9. dimage4 6.3.5.12.10. dimage5 6.3.5.12.11. dimage6 6.3.5.12.12. dimage7
7. Troubleshooting/Debugging x
7.1. Hardware 7.2. Debug Toolkit
7.1. Hardware x
7.1.1. Debugging Link Training Issues 7.1.2. Debugging Data Transfer and Performance Issues
7.1.1. Debugging Link Training Issues x
7.1.1.1. Generic Tools and Utilities 7.1.1.2. Signal Tap II Logic Analyzer 7.1.1.3. Additional Debug Tools
7.1.2. Debugging Data Transfer and Performance Issues x
7.1.2.1. Advanced Error Reporting (AER) 7.1.2.2. Second-Level Debug Tools
7.2. Debug Toolkit x
7.2.1. Overview 7.2.2. Enabling the P-Tile Debug Toolkit 7.2.3. Launching the P-Tile Debug Toolkit 7.2.4. Using the P-Tile Debug Toolkit 7.2.5. Using the P-Tile Link Inspector
A. Configuration Space Registers x
A.1. Configuration Space Registers A.2. Configuration Space Registers for Virtualization A.3. Intel-Defined VSEC Capability Registers
A.1. Configuration Space Registers x
A.1.1. Register Access Definitions A.1.2. PCIe Configuration Header Registers A.1.3. PCI Express Capability Structures A.1.4. Physical Layer 16.0 GT/s Extended Capability Structure A.1.5. MSI-X Registers
A.2. Configuration Space Registers for Virtualization x
A.2.1. SR-IOV Virtualization Extended Capabilities Registers Address Map A.2.2. PCIe Configuration Registers for Each Virtual Function
A.2.2. PCIe Configuration Registers for Each Virtual Function x
A.2.2.1. Alternative Routing ID (ARI) Capability Structure A.2.2.2. TLP Processing Hint (TPH) Capability Structure A.2.2.3. Address Translation Services (ATS) Capability Structure A.2.2.4. Access Control Services (ACS) Capability Structure
A.2.2.1. Alternative Routing ID (ARI) Capability Structure x
A.2.2.1.1. ARI Enhanced Capability Header Register (Offset 0x0) A.2.2.1.2. ARI Capability and Control Register (Offset 0x4)
A.2.2.2. TLP Processing Hint (TPH) Capability Structure x
A.2.2.2.1. TPH Requester Enhanced Capability Header (Offset 0x0) A.2.2.2.2. TPH Requester Capability Register (Offset 0x4) A.2.2.2.3. TPH Requester Control Register (Offset 0x8)
A.2.2.3. Address Translation Services (ATS) Capability Structure x
A.2.2.3.1. ATS Enhanced Capability Header (Offset 0x0) A.2.2.3.2. ATS Capability Register and ATS Control Register (Offset 0x4)
A.2.2.4. Access Control Services (ACS) Capability Structure x
A.2.2.4.1. ACS Extended Capability Header (Offset 0x0) A.2.2.4.2. ACS Capability Register (Offset 0x4) A.2.2.4.3. ACS Control Register (Offset 0x6) A.2.2.4.4. Egress Control Vector (Offset 0x8)
A.3. Intel-Defined VSEC Capability Registers x
A.3.1. Intel-Defined VSEC Capability Header (Offset 00h) A.3.2. Intel-Defined Vendor Specific Header (Offset 04h) A.3.3. Intel Marker (Offset 08h) A.3.4. JTAG Silicon ID (Offset 0x0C - 0x18) A.3.5. User Configurable Device and Board ID (Offset 0x1C - 0x1D) A.3.6. General Purpose Control and Status Register (Offset 0x30) A.3.7. Uncorrectable Internal Error Status Register (Offset 0x34) A.3.8. Uncorrectable Internal Error Mask Register (Offset 0x38) A.3.9. Correctable Internal Error Status Register (Offset 0x3C) A.3.10. Correctable Internal Error Mask Register (Offset 0x40)
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
D. Packets Forwarded to the User Application in TLP Bypass Mode x
D.1. EP TLP Bypass Mode (Upstream) D.2. RC TLP Bypass Mode (Downstream)
E. Using the Avery BFM for Intel P-Tile PCI Express Gen4 x16 Simulations x
E.1. Overview E.2. Generate the PCIe PIO Example Design E.3. Integrate Avery BFMs (Root Complex) E.4. Configure the Avery BFM and Update the Simulation Script E.5. Compile and Simulate E.6. View the Results
E.2. Generate the PCIe PIO Example Design x
E.2.1. Avalon® -ST PCIe PIO Example Design
F. Bifurcated Endpoint Support for Independent Warm Resets x
F.1. PCI Express Resets F.2. P-tile PCIe Design Constraints
F.2. P-tile PCIe Design Constraints x
F.2.1. P-tile Dual-Endpoint System Configurations
G. Margin Masks for the P-Tile Avalon Streaming FPGA IP for PCI Express x
G.1. Margin Masks Overview G.2. Nx5 Testing Efficiency G.3. Debug Toolkit Margin Methodology
G.2. Nx5 Testing Efficiency x
G.2.1. First Time Testing G.2.2. Spot Check Testing
G.3. Debug Toolkit Margin Methodology x
G.3.1. Debug Toolkit (DTK) Testing Process G.3.2. DTK Margin Evaluation Based on Margin Mask Values
1. About the P-tile Avalon® FPGA IPs for PCI Express
2. IP Architecture and Functional Description
3. Advanced Features
4. Interfaces
5. Parameters
6. Testbench
7. Troubleshooting/Debugging
8. P-tile Avalon® Streaming FPGA IP for PCI Express* User Guide Archives
9. Document Revision History for the P-Tile Avalon® Streaming FPGA IP for PCI Express* User Guide
A. Configuration Space Registers
B. Root Port Enumeration
C. Implementation of Address Translation Services (ATS) in Endpoint Mode
D. Packets Forwarded to the User Application in TLP Bypass Mode
E. Using the Avery BFM for Intel P-Tile PCI Express Gen4 x16 Simulations
F. Bifurcated Endpoint Support for Independent Warm Resets
G. Margin Masks for the P-Tile Avalon Streaming FPGA IP for PCI Express

A.1. Configuration Space Registers

In addition to accessing the Endpoint's configuration space registers by sending Configuration Read/Write TLPs via the Avalon® -ST interface, the application logic can also gain read access to these registers via the Configuration Output Interface (tl_cfg*). Furthermore, the Hard IP Reconfiguration Interface (a User Avalon® -MM interface) also provides read/write access to these registers.

For signal timings on the User Avalon® -MM interface, refer to the Avalon® Interface Specifications document.

The table PCIe Configuration Space Registers describes the registers for each PF. To calculate the address for a particular register in a particular PF, add the offset for that PF from the table Configuration Space Offsets to the byte address for that register as given in the table PCIe Configuration Space Registers.

Table 123.  Configuration Space Offsets
Registers User Avalon® -MM Offsets
Physical function 0 0x0000
Physical function 1 0x1000
Physical function 2 0x2000
Physical function 3 0x3000
Physical function 4 0x4000
Physical function 5 0x5000
Physical function 6 0x6000
Physical function 7 0x7000
User Avalon-MM Control Register 0x104068
Debug (DBI) Register 0x104200, 0x104204
Note: In 1x8 EP mode, only the x16 (Port 0) core is active.
Table 124.  PCIe Configuration Space Registers for x16/x8/x4 Controllers
Byte Address Hard IP Configuration Space Register Corresponding Section in PCIe Specification

x16 (Port 0) = 0x000 : 0x03C

x8 (Port 1) = 0x000 : 0x03C

x4 (Ports 2,3) = 0x000 : 0x03C

 PCI Header Type 0/1 Configuration Registers Type 0/1 Configuration Space Header

x16 (Port 0) = 0x040 : 0x044

x8 (Port 1) = 0x040 : 0x044

x4 (Ports 2,3) = 0x040 : 0x044

 Power Management PCI Power Management Capability Structure

x16 (Port 0) = 0x050 : 0x064

x8 (Port 1) = 0x050 : 0x064

x4 (Ports 2,3) = 0x050 : 0x05c

 MSI Capability

MSI Capability Structure, see also PCI Local Bus Specification

x16 (Port 0) = 0x070 : 0x0A8

x8 (Port 1) = 0x070 : 0x0A8

x4 (Ports 2,3) = 0x070 : 0x0A8

 PCI Express Capability PCI Express Capability Structure

x16 (Port 0) = 0x0B0 : 0x0B9

x8 (Port 1) = 0x0B0 : 0x0B9

x4 (Ports 2,3) = 0x0B0 : 0x0B9

 MSI-X Capability MSI-X Capability Structure, see also PCI Local Bus Specification

x16 (Port 0) = 0x0BC : 0x0FC

x8 (Port 1) = 0x0BC : 0x0FC

x4 (Ports 2,3) = 0x0BC : 0x0FC

 Reserved N/A

x16 (Port 0) = 0x100 : 0x144

x8 (Port 1) = 0x100 : 0x144

x4 (Ports 2,3) = 0x100 : 0x144

 Advanced Error Reporting (AER) Advanced Error Reporting Capability Structure

x16 (Port 0) = 0x148 : 0x164

x8 (Port 1) = 0x148 : 0x164

x4 (Ports 2,3) = 0x148 : 0x164

 Virtual Channel Capability Virtual Channel Capability Structure

x16 (Port 0) = 0x178 : 0x17C

x8 (Port 1) = 0x178 : 0x17C

x4 (Ports 2,3) = N/A

 Alternative Routing-ID Implementation (ARI) ARI Capability Structure

x16 (Port 0) = 0x188 : 0x1B4

x8 (Port 1) = 0x188 : 0x1A4

x4 (Ports 2,3) = 0x188 : 0x1A4

Secondary PCI Express Extended Capability Header

 PCI Express Extended Capability

x16 (Port 0) = 0x1B8 : 0x1E4

x8 (Port 1) = 0x1A8 : 0x1CC

x4 (Ports 2,3) = 0x1A8 : 0x1C8

 Physical Layer 16.0 GT/s Extended Capability Physical Layer 16.0 GT/s Extended Capability Structure

x16 (Port 0) = 0x1E8 : 0x22C

x8 (Port 1) = 0x1D0 : 0x1F4

x4 (Ports 2,3) = 0x1CC : 0x1E0

 Margining Extended Capability Margining Extended Capability Structure

x16 (Port 0) = 0x230 : 0x26C

x8 (Port 1) = 0x1F8 : 0x234

x4 (Ports 2,3) = N/A

 SR-IOV Capability SR-IOV Capability Structure

x16 (Port 0) = 0x270 : 0x2F8

x8 (Port 1) = 0x238 : 0x2C0

x4 (Ports 2,3) = 0x1E4 : 0x26C

 TLP Processing Hints (TPH) Capability TLP Processing Hints (TPH) Capability Structure

x16 (Port 0) = 0x2FC : 0x300

x8 (Port 1) = 0x2C4 : 0x2C8

x4 (Ports 2,3) = N/A

 Address Translation Services (ATS) Capability Address Translation Services Extended Capability (ATS) in Single Root I/O Virtualization and Sharing Specification

x16 (Port 0) = 0x30C : 0x314

x8 (Port 1) = 0x2D4 : 0x2DC

x4 (Ports 2,3) = 0x280 : 0x288

 Access Control Services (ACS) Capability Access Control Services (ACS) Capability

x16 (Port 0) = 0x318 : 0x324

x8 (Port 1) = 0x2E0 : 0x2EC

x4 (Ports 2,3) = N/A

 Page Request Services (PRS) Capability Page Request Services (PRS) Capability

x16 (Port 0) = 0x328 : 0x32C

x8 (Port 1) = 0x2F0 : 0x2F4

x4 (Ports 2,3) = N/A

 Latency Tolerance Reporting (LTR) Capability Latency Tolerance Reporting (LTR) Capability

x16 (Port 0) = 0x330 : 0x334

x8 (Port 1) = 0x2F8 : 0x2FC

x4 (Ports 2,3) = N/A

 Process Address Space (PASID) Capability Process Address Space (PASID) Capability Structure

x16 (Port 0) = 0x338 : 0x434

x8 (Port 1) = 0x300 : 0x3FC

x4 (Ports 2,3) = 0x2AC : 0x3A8

 RAS D.E.S. Capability (VSEC)  

x16 (Port 0) = 0x470 : 0x478

x8 (Port 1) = 0x438 : 0x440

x4 (Ports 2,3) = 0x3E4 : 0x3EC

 Data Link Feature Extended Capability  

x16 (Port 0) = 0xD00 : 0xD58

x8 (Port 1) = 0xD00 : 0xD58

x4 (Ports 2,3) = 0xD00 : 0xD58

 Intel-defined VSEC  

Section Content
Register Access Definitions
PCIe Configuration Header Registers
PCI Express Capability Structures
Physical Layer 16.0 GT/s Extended Capability Structure
MSI-X Registers

Level Two Title