Stratix V Avalon-ST Interface with SR-IOV PCIe Solutions: User Guide

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ID 683488
Date 5/02/2016
Public
Document Table of Contents
Document Table of Contents x
1. Datasheet 2. Getting Started with the SR-IOV DMA Example Design 3. Parameter Settings 4. Interfaces and Signal Descriptions 5. Registers 6. Programming and Testing SR-IOV Bridge MSI Interrupts 7. Error Handling 8. IP Core Architecture 9. Design Implementation 10. Transceiver PHY IP Reconfiguration 11. Debugging A. Frequently Asked Questions for PCI Express B. Transaction Layer Packet (TLP) Header Formats C. Stratix V Avalon-ST with SR-IOV Interface for PCIe Solutions User Guide Archive 12. Document Revision History
1. Datasheet x
1.1. Stratix® V Avalon-ST Interface with SR-IOV for PCIe Datasheet 1.2. Release Information 1.3. Device Family Support 1.4. Design Examples for SR-IOV 1.5. Debug Features 1.6. IP Core Verification 1.7. Performance and Resource Utilization 1.8. Recommended Speed Grades for SR-IOV Interface 1.9. Creating a Design for PCI Express
1.1. Stratix® V Avalon-ST Interface with SR-IOV for PCIe Datasheet x
1.1.1. SR-IOV Features
1.6. IP Core Verification x
1.6.1. Compatibility Testing Environment
2. Getting Started with the SR-IOV DMA Example Design x
2.1. Generating the Example Design Testbench 2.2. Understanding the Generated Files and Directories 2.3. Simulating the SR-IOV Example Design 2.4. Running a Gate-Level Simulation 2.5. Understanding the DMA Functionality 2.6. Compiling the Example Design with the Quartus® Prime Software 2.7. Using the IP Catalog To Generate Your Stratix V Hard IP for PCI Express as a Separate Component
3. Parameter Settings x
3.1. System Settings 3.2. SR-IOV System Settings 3.3. Base Address Register (BAR) Settings 3.4. SR-IOV Device Identification Registers 3.5. Interrupt Capabilities 3.6. PCI Express and PCI Capabilities Parameters 3.7. PHY Characteristics 3.8. Simulation Options
3.6. PCI Express and PCI Capabilities Parameters x
3.6.1. Device Capabilities 3.6.2. Error Reporting 3.6.3. Link Capabilities 3.6.4. Slot Capabilities 3.6.5. Power Management
4. Interfaces and Signal Descriptions x
4.1. Avalon-ST TX Interface 4.2. Component-Specific Avalon-ST Interface Signals 4.3. Avalon-ST RX Interface 4.4. BAR Hit Signals 4.5. Configuration Status Interface 4.6. Clock Signals 4.7. Function-Level Reset Interface 4.8. Interrupt Interface 4.9. Configuration Extension Bus (CEB) Interface 4.10. Implementing MSI-X Interrupts 4.11. Local Management Interface (LMI) Signals 4.12. Reset, Status, and Link Training Signals 4.13. Transceiver Reconfiguration 4.14. Serial Data Signals 4.15. Test Signals 4.16. PIPE Interface Signals
4.9. Configuration Extension Bus (CEB) Interface x
4.9.1. Vital Product Data (VPD) Capability
4.9.1. Vital Product Data (VPD) Capability x
4.9.1.1. Determine the Pointer Address of an External Capability Register 4.9.1.2. VPD Capability Implementation
4.14. Serial Data Signals x
4.14.1. Physical Layout of Hard IP In Stratix V Devices 4.14.2. Channel Placement in Arria V GZ and Stratix V GX/GT/GS Devices
5. Registers x
5.1. Correspondence between Configuration Space Registers and the PCIe Specification 5.2. PCI and PCI Express Configuration Space Registers 5.3. MSI Registers 5.4. MSI-X Capability Structure 5.5. Power Management Capability Structure 5.6. PCI Express Capability Structure 5.7. Advanced Error Reporting (AER) Enhanced Capability Header Register 5.8. Uncorrectable Error Status Register 5.9. Uncorrectable Error Mask Register 5.10. Uncorrectable Error Severity Register 5.11. Correctable Error Status Register 5.12. Correctable Error Mask Register 5.13. Advanced Error Capabilities and Control Register 5.14. Header Log Registers 0-3 5.15. SR-IOV Virtualization Extended Capabilities Registers 5.16. Virtual Function Registers
5.2. PCI and PCI Express Configuration Space Registers x
5.2.1. Type 0 Configuration Space Registers 5.2.2. PCI and PCI Express Configuration Space Register Content 5.2.3. Interrupt Line and Interrupt Pin Register
5.15. SR-IOV Virtualization Extended Capabilities Registers x
5.15.1. SR-IOV Virtualization Extended Capabilities Registers Address Map 5.15.2. ARI Enhanced Capability Header 5.15.3. SR-IOV Enhanced Capability Registers 5.15.4. Initial VFs and Total VFs Registers 5.15.5. VF Device ID Register 5.15.6. Page Size Registers 5.15.7. VF Base Address Registers (BARs) 0-5 5.15.8. Secondary PCI Express Extended Capability Header 5.15.9. Lane Status Registers
6. Programming and Testing SR-IOV Bridge MSI Interrupts x
6.1. Setting Up and Verifying MSI Interrupts 6.2. Masking MSI Interrupts 6.3. Dropping a Pending MSI Interrupt
7. Error Handling x
7.1. Physical Layer Errors 7.2. Data Link Layer Errors 7.3. Transaction Layer Errors 7.4. Error Reporting and Data Poisoning 7.5. Uncorrectable and Correctable Error Status Bits
8. IP Core Architecture x
8.1. Data Link Layer 8.2. Physical Layer 8.3. Top-Level Interfaces 8.4. Physical and Virtual Function Address Assignments 8.5. Stratix V Hard IP for PCI Express with Single-Root I/O Virtualization (SR-IOV)
8.3. Top-Level Interfaces x
8.3.1. Avalon-ST Interface 8.3.2. Clocks and Reset 8.3.3. Transceiver Reconfiguration 8.3.4. Interrupts 8.3.5. PIPE
9. Design Implementation x
9.1. Making Analog QSF Assignments Using the Assignment Editor 9.2. Making Pin Assignments to Assign I/O Standard to Serial Data Pins 9.3. Recommended Reset Sequence to Avoid Link Training Issues 9.4. SDC Timing Constraints
10. Transceiver PHY IP Reconfiguration x
10.1. Connecting the Transceiver Reconfiguration Controller IP Core 10.2. Transceiver Reconfiguration Controller Connectivity for Designs Using CvP
11. Debugging x
11.1. Setting Up Simulation 11.2. Hardware Bring-Up Issues 11.3. Link Training 11.4. Use Third-Party PCIe Analyzer 11.5. BIOS Enumeration Issues
11.1. Setting Up Simulation x
11.1.1. Changing Between Serial and PIPE Simulation 11.1.2. Using the PIPE Interface for Gen1 and Gen2 Variants 11.1.3. Viewing the Important PIPE Interface Signals 11.1.4. Disabling the Scrambler for Gen1 and Gen2 Simulations 11.1.5. Disabling 8B/10B Encoding and Decoding for Gen1 and Gen2 Simulations 11.1.6. Changing between the Hard and Soft Reset Controller
11.3. Link Training x
11.3.1. Debugging Link that Fails To Reach L0
B. Transaction Layer Packet (TLP) Header Formats x
B.1. TLP Packet Formats without Data Payload B.2. TLP Packet Formats with Data Payload
12. Document Revision History x
12.1. Document Revision History for the Intel® Arria® 10 Avalon® Streaming with SR-IOV IP for PCIe* User Guide
1. Datasheet
2. Getting Started with the SR-IOV DMA Example Design
3. Parameter Settings
4. Interfaces and Signal Descriptions
5. Registers
6. Programming and Testing SR-IOV Bridge MSI Interrupts
7. Error Handling
8. IP Core Architecture
9. Design Implementation
10. Transceiver PHY IP Reconfiguration
11. Debugging
A. Frequently Asked Questions for PCI Express
B. Transaction Layer Packet (TLP) Header Formats
C. Stratix V Avalon-ST with SR-IOV Interface for PCIe Solutions User Guide Archive
12. Document Revision History

8.5. Stratix V Hard IP for PCI Express with Single-Root I/O Virtualization (SR-IOV)

The Stratix V Hard IP for PCI Express with SR-IOV bypasses the Configuration Space and base address register (BAR) matching logic of the Hard IP. The SR-IOV bridge implements the following functions in soft logic:

  • Configuration spaces for 2 PCIe Physical Functions and 128 Virtual Functions
  • BAR checking logic
  • Interrupt generation
  • Error messages for Advanced Error Reporting (AER)

The SR-IOV processes memory requests, Completions and messages received from the link. It passes them to the Application Layer unmodified, using the Avalon-ST RX interface. The SR-IOV Bridge does not maintain any state for requests outstanding on the Master or Target sides. The RX interface delivers Completion TLPs to the Application Layer in the same order as received from the link. It does not match Completion TLPs with the outstanding requests from the Application Layer.

The following figure illustrates the SR-IOV Bridge logic and its interfaces to the Stratix V Hard IP for PCI Express and Application Layer.

Figure 37. Block Diagram of the Stratix V Hard IP for PCI Express IP with the SR-IOV Bridge

SR-IOV Bridge Logic Details

Soft logic in the SR-IOV Bridge decodes Configuration Space transactions on Avalon-ST interface via Configuration Bypass mode and forwards them to the internal Configuration Block. The Configuration Block implements the following logic:

  • Processes incoming Configuration Space TLPs and generates Completions
  • Includes Configuration Space registers of 2 Physical Functions and 128 Virtual Functions.
  • Generates MSI, MSI-X, and Legacy Interrupts (INTx Assert and Deassert)
  • Generates error messages for AER
  • Multiplexes the following data sources to on the Avalon-ST TX interface:
    • Master-side requests and Target-side Completions generated by the Application Layer
    • UR Completions from the BAR Check block for Memory Read Requests
  • Transmits Memory Read and Memory Write received on TX Avalon-ST interface from the Application Layer. The core forwards these requests to the host as is, without any checking for errors. Application Layer logic must make sure the transmitted memory requests satisfy all PCI Express requirements.

BAR Logic Details

The BAR block includes the following functions:

  • Compares the addresses of received memory transactions to the BAR settings for the targeted function
  • Generates the BAR hit signals and the function number associated with this transaction
  • Identifies PF and VF BAR accesses
  • Discards all memory transactions that are not in the address range of any of the configured BARs
  • Generates Unsupported Request (UR) Completions for requests that fail the BAR check

Local Management Interface (LMI)

SR-IOV LMI logic accesses Configuration Space Registers of all Physical and Virtual Functions. The LMI logic accepts read and write requests from the Application Layer and directs requests to either the LMI interface of the Hard IP or the Configuration Registers in the Configuration Block.

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