Arria V Avalon-ST Interface for PCIe Solutions: User Guide

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ID 683660
Date 5/12/2017
Public
Document Table of Contents
Document Table of Contents x
1. Datasheet 2. Getting Started with the Arria V Hard IP for PCI Express 3. Parameter Settings 4. Interfaces and Signal Descriptions 5. Registers 6. Interrupts 7. Error Handling 8. IP Core Architecture 9. Transaction Layer Protocol (TLP) Details 10. Throughput Optimization 11. Design Implementation 12. Additional Features 13. Hard IP Reconfiguration 14. Transceiver PHY IP Reconfiguration 15. Testbench and Design Example 16. Debugging A. Frequently Asked Questions for PCI Express B. Lane Initialization and Reversal C. Document Revision History
1. Datasheet x
1.1. Arria V Avalon-ST Interface for PCIe Datasheet 1.2. Features 1.3. Release Information 1.4. Device Family Support 1.5. Configurations 1.6. Example Designs 1.7. Debug Features 1.8. IP Core Verification 1.9. Performance and Resource Utilization 1.10. Recommended Speed Grades 1.11. Creating a Design for PCI Express
1.8. IP Core Verification x
1.8.1. Compatibility Testing Environment
2. Getting Started with the Arria V Hard IP for PCI Express x
2.1. Qsys Design Flow 2.2. Modifying the Example Design 2.3. Using the IP Catalog To Generate Your Arria V Hard IP for PCI Express as a Separate Component
2.1. Qsys Design Flow x
2.1.1. Generating the Testbench 2.1.2. Simulating the Example Design 2.1.3. Generating Synthesis Files 2.1.4. Understanding the Files Generated 2.1.5. Understanding Physical Placement of the PCIe IP Core 2.1.6. Compiling the Design in the Quartus® Prime Software
3. Parameter Settings x
3.1. Avalon-ST System Settings 3.2. Link Capabilities 3.3. Port Function Parameters Shared Across All Port Functions 3.4. Port Function Parameters Defined Separately for All Port Functions
3.3. Port Function Parameters Shared Across All Port Functions x
3.3.1. Device Capabilities 3.3.2. Error Reporting 3.3.3. Link Capabilities 3.3.4. Slot Capabilities 3.3.5. Power Management
3.4. Port Function Parameters Defined Separately for All Port Functions x
3.4.1. Base Address Register (BAR) and Expansion ROM Settings 3.4.2. Base and Limit Registers for Root Ports 3.4.3. Device Identification Registers for Function <n> 3.4.4. Func <n> Device 3.4.5. Func <n> Link 3.4.6. Func <n> MSI and MSI-X Capabilities 3.4.7. Func <n> Legacy Interrupt
4. Interfaces and Signal Descriptions x
4.1. Clock Signals 4.2. Reset, Status, and Link Training Signals 4.3. ECRC Forwarding 4.4. Error Signals 4.5. Interrupts for Endpoints 4.6. Interrupts for Root Ports 4.7. Completion Side Band Signals 4.8. LMI Signals 4.9. Transaction Layer Configuration Space Signals 4.10. Hard IP Reconfiguration Interface 4.11. Power Management Signals 4.12. Physical Layer Interface Signals
4.9. Transaction Layer Configuration Space Signals x
4.9.1. Configuration Space Register Access Timing 4.9.2. Configuration Space Register Access
4.12. Physical Layer Interface Signals x
4.12.1. Serial Data Signals 4.12.2. PIPE Interface Signals 4.12.3. Test Signals
4.12.1. Serial Data Signals x
4.12.1.1. Physical Layout of Hard IP in Arria V Devices 4.12.1.2. Channel Placement in Arria V Devices
5. Registers x
5.1. Correspondence between Configuration Space Registers and the PCIe Specification 5.2. Type 0 Configuration Space Registers 5.3. Type 1 Configuration Space Registers 5.4. PCI Express Capability Structures 5.5. Intel-Defined VSEC Registers 5.6. Advanced Error Reporting Capability
5.5. Intel-Defined VSEC Registers x
5.5.1. CvP Registers
5.6. Advanced Error Reporting Capability x
5.6.1. Uncorrectable Internal Error Mask Register 5.6.2. Uncorrectable Internal Error Status Register 5.6.3. Correctable Internal Error Mask Register 5.6.4. Correctable Internal Error Status Register
6. Interrupts x
6.1. Interrupts for Endpoints 6.2. Interrupts for Root Ports
6.1. Interrupts for Endpoints x
6.1.1. MSI and Legacy Interrupts 6.1.2. MSI-X 6.1.3. Implementing MSI-X Interrupts 6.1.4. Legacy Interrupts
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. Top-Level Interfaces 8.2. Transaction Layer 8.3. Data Link Layer 8.4. Physical Layer 8.5. Multi-Function Support
8.1. Top-Level Interfaces x
8.1.1. Avalon-ST Interface 8.1.2. Clocks and Reset 8.1.3. Local Management Interface (LMI Interface) 8.1.4. Hard IP Reconfiguration 8.1.5. Transceiver Reconfiguration 8.1.6. Interrupts 8.1.7. PIPE
8.2. Transaction Layer x
8.2.1. Configuration Space
9. Transaction Layer Protocol (TLP) Details x
9.1. Supported Message Types 9.2. Transaction Layer Routing Rules 9.3. Receive Buffer Reordering
9.1. Supported Message Types x
9.1.1. INTX Messages 9.1.2. Power Management Messages 9.1.3. Error Signaling Messages 9.1.4. Locked Transaction Message 9.1.5. Slot Power Limit Message 9.1.6. Vendor-Defined Messages 9.1.7. Hot Plug Messages
9.3. Receive Buffer Reordering x
9.3.1. Using Relaxed Ordering
10. Throughput Optimization x
10.1. Throughput of Posted Writes 10.2. Throughput of Non-Posted Reads
11. Design Implementation x
11.1. Making Analog QSF Assignments Using the Assignment Editor 11.2. Making Pin Assignments to Assign I/O Standard to Serial Data Pins 11.3. Recommended Reset Sequence to Avoid Link Training Issues 11.4. SDC Timing Constraints
12. Additional Features x
12.1. Configuration over Protocol (CvP) 12.2. Autonomous Mode 12.3. ECRC
12.2. Autonomous Mode x
12.2.1. Enabling Autonomous Mode 12.2.2. Enabling CvP Initialization
12.3. ECRC x
12.3.1. ECRC on the RX Path 12.3.2. ECRC on the TX Path
14. Transceiver PHY IP Reconfiguration x
14.1. Connecting the Transceiver Reconfiguration Controller IP Core 14.2. Transceiver Reconfiguration Controller Connectivity for Designs Using CvP
15. Testbench and Design Example x
15.1. Endpoint Testbench 15.2. Root Port Testbench 15.3. Test Driver Module 15.4. Root Port Design Example 15.5. Root Port BFM Overview 15.6. BFM Procedures and Functions 15.7. Setting Up Simulation
15.1. Endpoint Testbench x
15.1.1. Endpoint Testbench for SR-IOV
15.5. Root Port BFM Overview x
15.5.1. BFM Memory Map 15.5.2. Configuration Space Bus and Device Numbering 15.5.3. Configuration of Root Port and Endpoint 15.5.4. Issuing Read and Write Transactions to the Application Layer
15.6. BFM Procedures and Functions x
15.6.1. ebfm_barwr Procedure 15.6.2. ebfm_barwr_imm Procedure 15.6.3. ebfm_barrd_wait Procedure 15.6.4. ebfm_barrd_nowt Procedure 15.6.5. ebfm_cfgwr_imm_wait Procedure 15.6.6. ebfm_cfgwr_imm_nowt Procedure 15.6.7. ebfm_cfgrd_wait Procedure 15.6.8. ebfm_cfgrd_nowt Procedure 15.6.9. BFM Configuration Procedures 15.6.10. BFM Shared Memory Access Procedures 15.6.11. BFM Log and Message Procedures 15.6.12. Verilog HDL Formatting Functions
15.6.9. BFM Configuration Procedures x
15.6.9.1. ebfm_cfg_rp_ep Procedure 15.6.9.2. ebfm_cfg_decode_bar Procedure
15.6.10. BFM Shared Memory Access Procedures x
15.6.10.1. Shared Memory Constants 15.6.10.2. shmem_write Task 15.6.10.3. shmem_read Function 15.6.10.4. shmem_display Verilog HDL Function 15.6.10.5. shmem_fill Procedure 15.6.10.6. shmem_chk_ok Function
15.6.11. BFM Log and Message Procedures x
15.6.11.1. ebfm_display Verilog HDL Function 15.6.11.2. ebfm_log_stop_sim Verilog HDL Function 15.6.11.3. ebfm_log_set_suppressed_msg_mask Task 15.6.11.4. ebfm_log_set_stop_on_msg_mask Verilog HDL Task 15.6.11.5. ebfm_log_open Verilog HDL Function 15.6.11.6. ebfm_log_close Verilog HDL Function
15.6.12. Verilog HDL Formatting Functions x
15.6.12.1. himage1 15.6.12.2. himage2 15.6.12.3. himage4 15.6.12.4. himage8 15.6.12.5. himage16 15.6.12.6. dimage1 15.6.12.7. dimage2 15.6.12.8. dimage3 15.6.12.9. dimage4 15.6.12.10. dimage5 15.6.12.11. dimage6 15.6.12.12. dimage7
15.7. Setting Up Simulation x
15.7.1. Changing Between Serial and PIPE Simulation 15.7.2. Using the PIPE Interface for Gen1 and Gen2 Variants 15.7.3. Viewing the Important PIPE Interface Signals 15.7.4. Disabling the Scrambler for Gen1 and Gen2 Simulations 15.7.5. Disabling 8B/10B Encoding and Decoding for Gen1 and Gen2 Simulations 15.7.6. Changing between the Hard and Soft Reset Controller
16. Debugging x
16.1. Hardware Bring-Up Issues 16.2. Link Training 16.3. Use Third-Party PCIe Analyzer 16.4. BIOS Enumeration Issues
16.2. Link Training x
16.2.1. Link Hangs in L0 State
C. Document Revision History x
C.1. Document Revision History of the Arria V Avalon® Streaming (Avalon-ST) Interface for PCIe* Solutions User Guide
1. Datasheet
2. Getting Started with the Arria V Hard IP for PCI Express
3. Parameter Settings
4. Interfaces and Signal Descriptions
5. Registers
6. Interrupts
7. Error Handling
8. IP Core Architecture
9. Transaction Layer Protocol (TLP) Details
10. Throughput Optimization
11. Design Implementation
12. Additional Features
13. Hard IP Reconfiguration
14. Transceiver PHY IP Reconfiguration
15. Testbench and Design Example
16. Debugging
A. Frequently Asked Questions for PCI Express
B. Lane Initialization and Reversal
C. Document Revision History

15.5.3. Configuration of Root Port and Endpoint

Before you issue transactions to the Endpoint, you must configure the Root Port and Endpoint Configuration Space registers. Use ebfm_cfg_rp_ep in altpcietb_bfm_configure.v to configure these registers.

The ebfm_cfg_rp_ep procedure executes the following steps to initialize the Configuration Space:

  1. Sets the Root Port Configuration Space to enable the Root Port to send transactions on the PCI Express link.
  2. Sets the Root Port and Endpoint PCI Express Capability Device Control registers as follows:
    1. Disables Error Reporting in both the Root Port and Endpoint. The BFM does not have error handling capability.
    2. Enables Relaxed Ordering in both Root Port and Endpoint.
    3. Enables Extended Tags for the Endpoint if the Endpoint has that capability.
    4. Disables Phantom Functions, Aux Power PM, and No Snoop in both the Root Port and Endpoint.
    5. Sets the Max Payload Size to the value that the Endpoint supports because the Root Port supports the maximum payload size.
    6. Sets the Root Port Max Read Request Size to 4 KB because the example Endpoint design supports breaking the read into as many completions as necessary.
    7. Sets the Endpoint Max Read Request Size equal to the Max Payload Size because the Root Port does not support breaking the read request into multiple completions.
  3. Assigns values to all the Endpoint BAR registers. The BAR addresses are assigned by the algorithm outlined below.
    1. I/O BARs are assigned smallest to largest starting just above the ending address of BFM shared memory in I/O space and continuing as needed throughout a full 32-bit I/O space.
    2. The 32-bit non-prefetchable memory BARs are assigned smallest to largest, starting just above the ending address of BFM shared memory in memory space and continuing as needed throughout a full 32-bit memory space.
    3. The value of the addr_map_4GB_limit input to the ebfm_cfg_rp_ep procedure controls the assignment of the 32-bit prefetchable and 64-bit prefetchable memory BARS. The default value of the addr_map_4GB_limit is 0.

      If the addr_map_4GB_limit input to the ebfm_cfg_rp_ep procedure is set to 0, then the ebfm_cfg_rp_ep procedure assigns the 32‑bit prefetchable memory BARs largest to smallest, starting at the top of 32-bit memory space and continuing as needed down to the ending address of the last 32-bit non-prefetchable BAR.

      However, if the addr_map_4GB_limit input is set to 1, the address map is limited to 4 GB. The ebfm_cfg_rp_ep procedure assigns 32-bit and 64-bit prefetchable memory BARs largest to smallest, starting at the top of the 32-bit memory space and continuing as needed down to the ending address of the last 32-bit non-prefetchable BAR.

    4. If the addr_map_4GB_limit input to the ebfm_cfg_rp_ep procedure is set to 0, then the ebfm_cfg_rp_ep procedure assigns the 64-bit prefetchable memory BARs smallest to largest starting at the 4 GB address assigning memory ascending above the 4 GB limit throughout the full 64-bit memory space.

      If the addr_map_4 GB_limit input to the ebfm_cfg_rp_ep procedure is set to 1, the ebfm_cfg_rp_ep procedure assigns the 32-bit and the 64-bit prefetchable memory BARs largest to smallest starting at the 4 GB address and assigning memory by descending below the 4 GB address to memory addresses as needed down to the ending address of the last 32-bit non-prefetchable BAR.

      The above algorithm cannot always assign values to all BARs when there are a few very large (1 GB or greater) 32-bit BARs. Although assigning addresses to all BARs may be possible, a more complex algorithm would be required to effectively assign these addresses. However, such a configuration is unlikely to be useful in real systems. If the procedure is unable to assign the BARs, it displays an error message and stops the simulation.

  4. Based on the above BAR assignments, the ebfm_cfg_rp_ep procedure assigns the Root Port Configuration Space address windows to encompass the valid BAR address ranges.
  5. The ebfm_cfg_rp_ep procedure enables master transactions, memory address decoding, and I/O address decoding in the Endpoint PCIe* control register.

The ebfm_cfg_rp_ep procedure also sets up a bar_table data structure in BFM shared memory that lists the sizes and assigned addresses of all Endpoint BARs. This area of BFM shared memory is write-protected. Consequently, any application logic write accesses to this area cause a fatal simulation error.

BFM procedure calls to generate full PCIe* addresses for read and write requests to particular offsets from a BAR use this data structure. . This procedure allows the testbench code that accesses the Endpoint application logic to use offsets from a BAR and avoid tracking specific addresses assigned to the BAR. The following table shows how to use those offsets.

Table 75.  BAR Table Structure

Offset (Bytes)

Description

+0

PCI Express address in BAR0

+4

PCI Express address in BAR1

+8

PCI Express address in BAR2

+12

PCI Express address in BAR3

+16

PCI Express address in BAR4

+20

PCI Express address in BAR5

+24

PCI Express address in Expansion ROM BAR

+28

Reserved

+32

BAR0 read back value after being written with all 1’s (used to compute size)

+36

BAR1 read back value after being written with all 1’s

+40

BAR2 read back value after being written with all 1’s

+44

BAR3 read back value after being written with all 1’s

+48

BAR4 read back value after being written with all 1’s

+52

BAR5 read back value after being written with all 1’s

+56

Expansion ROM BAR read back value after being written with all 1’s

+60

Reserved

The configuration routine does not configure any advanced PCI Express capabilities such as the AER capability.

Besides the ebfm_cfg_rp_ep procedure in altpcietb_bfm_driver_rp.v, routines to read and write Endpoint Configuration Space registers directly are available in the Verilog HDL include file. After the ebfm_cfg_rp_ep procedure runs the PCI Express I/O and Memory Spaces have the layout as described in the following three figures. The memory space layout depends on the value of the addr_map_4GB_limit input parameter. If addr_map_4GB_limit is 1 the resulting memory space map is shown in the following figure.

Figure 52. Memory Space Layout—4 GB Limit

The following figure shows the resulting memory space map when the addr_map_4GB_limit is 0.

Figure 53. Memory Space Layout—No Limit

The following figure shows the I/O address space.

Figure 54. I/O Address Space
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