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

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ID 683059
Date 12/13/2021
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Document Table of Contents
Document Table of Contents x
1. Introduction 2. IP Architecture and Functional Description 3. Advanced Features 4. Interfaces 5. Parameters 6. Testbench 7. Troubleshooting/Debugging 8. Intel® P-tile Avalon® Streaming IP for PCI Express* User Guide Archives 9. Document Revision History for the P-Tile Avalon® Streaming Intel® 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
1. Introduction 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
2.2. 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
1. Introduction
2. IP Architecture and Functional Description
3. Advanced Features
4. Interfaces
5. Parameters
6. Testbench
7. Troubleshooting/Debugging
8. Intel® P-tile Avalon® Streaming IP for PCI Express* User Guide Archives
9. Document Revision History for the P-Tile Avalon® Streaming Intel® 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

7.1.1.3. Additional Debug Tools

Use the Hard IP reconfiguration interface and PHY reconfiguration interface on the P-Tile Avalon® -ST IP for PCI Express to access additional registers (for example, receiver detection, lane reversal etc.).

Figure 69. Register Access for Debug

Using the Hard IP Reconfiguration Interface

Refer to the section Hard IP Reconfiguration Interface for details on this interface and the associated address map.

The following table lists the address offsets and bit settings for the PHY status registers. Use the Hard IP Reconfiguration Interface to access these read-only registers.

Table 112.  Hard IP Reconfiguration Interface Register Map for PHY Status
Offset Bit Position Register
x16 (Port 0) x8 (Port 1)
0x0003E8 0x0003B0 [3:0] Lane select (0x0: Lane 0, 0x1: Lane 1, …, 0xF: Lane15)
0x0003EA 0x0003B2 [0] RX polarity
[1] RX detection
[2] RX Valid
[3] RX Electrical Idle
[4] TX Electrical Idle
0x0003EC 0x0003B4 [7] Framing error
0x0003ED 0x0003B5 [7] Lane reversal
Follow the steps below to access registers in Table 112 using the Hard IP reconfiguration interface:
  1. Enable the Hard IP reconfiguration interface (User Avalon® -MM interface) using the IP Parameter Editor.
  2. Set the lane number for which you want to read the status by performing a read-modify-write to the address hip_reconfig_addr_i[20:0] with write data of lane number on hip_reconfig_writedata_i[7:0] using the Hard IP reconfiguration interface signals.
    • hip_reconfig_write_i = 1’b1
    • hip_reconfig_addr_i[20:0] = 0x0003E8
    • hip_reconfig_writedata_i[3:0] = <Lane number>, where Lane number = 4’h0 for lane 0, 4’h1 for lane 1, 4’h2 for lane 2, …
  3. Read the status of the register you want by performing a read operation from the address hip_reconfig_addr_i[20:0] using the Hard IP reconfiguration interface signals.
    • hip_reconfig_read_i = 1’b1
    • hip_reconfig_addr_i[20:0] = <offset>

      Offset = Refer to Table 112 for the offset mapping.

    • hip_reconfig_readdata_o[7:0] = Refer to Table 112 for the bit position mapping.
Example 1: To read the RX detection status of Lane0 using the registers
  1. Enable the Hard IP reconfiguration interface using the IP Parameter Editor.
  2. Perform read-modify-write to address 0x0003E8 to set the lane number to 0 using the Hard IP reconfiguration interface signals.
    • hip_reconfig_write_i = 1’b1
    • hip_reconfig_addr_i[20:0] = 0x0003E8
    • hip_reconfig_writedata_i[3:0] = 4'h0
  3. Read the status of the RX detection register by performing a read operation from the address 0x0003E9[1] using the Hard IP reconfiguration interface signals.
    • hip_reconfig_read_i = 1’b1
    • hip_reconfig_addr_i[20:0] = 0x0003EA
    • hip_reconfig_readdata_o[1] = 1'b1 (Far end receiver detected)

Using the Hard IP Reconfiguration Interface to Enable and Read ECRC and LCRC Error Counts

Table 113.  Hard IP Reconfiguration Interface Register Map for ECRC and LCRC Error Event Counters
Offset Bit Positions Register
x16 (Port 0) x8 (Port 1)
0x000119 0x000119 [0] Enable CRC Check
0x000340 0x000308 [1:0]

Event counter clear.

Set to 2'b01 to clear the specific event error counter defined in registers 0x00343and 0x00342.

Set to 2'b11 to clear all events' error counters.
[4:2]

Event counter enable.

Set to 3'b111.
0x000341 0x000309 [7:0]

Event counter lane select.

Set to 0x00.
0x000342 0x00030A [7:0]

Event number.

For LCRC error count, set to 0x01.

For ECRC error count, set to 0x02.
0x000343 0x00030B [7:0]

Group number.

For LCRC error count, set to 0x02.

For ECRC error count, set to 0x03.
0x000344 0x00030C [7:0] Error counter data bits [7:0].
0x000345 0x00030D [7:0] Error counter data bits [15:8].
0x000346 0x00030E [7:0] Error counter data bits [23:16].
0x000347 0x00030F [7:0] Error counter data bits [31:24].
Follow the steps below to access registers in the table above using the Hard IP Reconfiguration Interface:
  1. Enable the Hard IP Reconfiguration Interface (User Avalon-MM interface) using the IP Parameter Editor.
  2. Enable CRC check by performing a read-modify-write to the address p#_hip_reconfig_address[20:0] with write data on p#_hip_reconfig_writedata[7:0].
  3. Set the group number by performing a read-modify-write to the address p#_hip_reconfig_address[20:0] with write data on p#_hip_reconfig_writedata[7:0].
  4. Set the event number by performing a read-modify-write to the address p#_hip_reconfig_address[20:0] with write data on p#_hip_reconfig_writedata[7:0].
  5. Set the event counter lane select by performing a read-modify-write to the address p#_hip_reconfig_address[20:0] with write data on p#_hip_reconfig_writedata[7:0].
  6. Set event counter enable by performing a read-modify-write to the address p#_hip_reconfig_address[20:0] with write data on p#_hip_reconfig_writedata[7:0].
  7. Read the error count data by a read operation from the address p#_hip_reconfig_address[20:0].
Example: To read the LCRC error count of x16 Port0 using the registers:
  1. Enable the Hard IP Reconfiguration Interface (User Avalon-MM interface) using the IP Parameter Editor.
  2. Perform read-modify-write to address 0x000119 to enable CRC check.
    • p0_hip_reconfig_write = 1’b1
    • p0_hip_reconfig_address[20:0] = 0x000119
    • p0_hip_reconfig_writedata[7:0] = 8'h01
  3. Perform read-modify-write to address 0x000343 to set Group number.
    • p0_hip_reconfig_write = 1’b1
    • p0_hip_reconfig_address[20:0] = 0x000343
    • p0_hip_reconfig_writedata[7:0] = 8'h02
  4. Perform read-modify-write to address 0x000342 to set Event number.
    • p0_hip_reconfig_write = 1’b1
    • p0_hip_reconfig_address[20:0] = 0x000342
    • p0_hip_reconfig_writedata[7:0] = 8'h01
  5. Perform read-modify-write to address 0x000341 to set Event counter lane select.
    • p0_hip_reconfig_write = 1’b1
    • p0_hip_reconfig_address[20:0] = 0x000341
    • p0_hip_reconfig_writedata[7:0] = 8'h00
  6. Perform read-modify-write to address 0x000340 to set enable event counter.
    • p0_hip_reconfig_write = 1’b1
    • p0_hip_reconfig_address[20:0] = 0x000340
    • p0_hip_reconfig_writedata[7:0] = 8'h1C
  7. Read the error counter data by performing a read operation from registers 0x000344, 0x000345, 0x000346, and 0x000347.

Using the PHY Reconfiguration Interface

Refer to the section PHY Reconfiguration Interface for details on how to use this interface.

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