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

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ID 683038
Date 12/15/2021
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Document Table of Contents
Document Table of Contents x
1. Design Example Description 2. Quick Start Guide 3. P-tile Avalon® Streaming IP for PCI Express* Design Example User Guide Archives 4. Document Revision History for the Intel® P-Tile Avalon® Streaming Hard IP for PCIe* Design Example User Guide
1. Design Example Description x
1.1. Functional Description for the Programmed Input/Output (PIO) Design Example 1.2. Functional Description for the Single Root I/O Virtualization (SR-IOV) Design Example 1.3. Functional Description for the Performance Design Example 1.4. Hardware and Software Requirements
2. Quick Start Guide x
2.1. Directory Structure 2.2. Generating the Design Example 2.3. Simulating the Design Example 2.4. Compiling the Design Example 2.5. Installing the Linux Kernel Driver 2.6. Running the Design Example
2.3. Simulating the Design Example x
2.3.1. Testbench
2.3.1. Testbench x
2.3.1.1. Test Driver Module 2.3.1.2. PIO Design Example Testbench 2.3.1.3. SR-IOV Design Example Testbench 2.3.1.4. Performance Design Example Testbench
2.6. Running the Design Example x
2.6.1. Running the PIO Design Example 2.6.2. Running the SR-IOV Design Example
1. Design Example Description
2. Quick Start Guide
3. P-tile Avalon® Streaming IP for PCI Express* Design Example User Guide Archives
4. Document Revision History for the Intel® P-Tile Avalon® Streaming Hard IP for PCIe* Design Example User Guide

2.3.1.4. Performance Design Example Testbench

The figure below shows the Performance design example simulation design hierarchy. The tests for the Performance design example are defined with the apps_type_hwtcl parameter set to 3. The tests run under this parameter value are defined in ebfm_cfg_rp_ep_rootport, find_mem_bar and perf_ed_dma_write/perf_ed_dma_read.

Figure 22. Performance Design Example Simulation Design Hierarchy
The testbench starts with link training and then accesses the configuration space of the IP for enumeration. A task called perf_ed_dma_write and perf_ed_dma_read (defined in the Root Port PCIe BFM altpcietb_bfm_rp_gen4_x16.sv) then performs the PCIe link test. This test consists of the following steps:
  1. Issue a memory write command to set up the Performance design example's target memory write address.
  2. Issue a memory write command to trigger the Performance design example to send 10 memory writes with 128 bytes in length.
  3. Issue a memory write command to set up the Performance design example's target memory read address.
  4. Issue a memory write command to trigger the Performance design example to send 10 memory reads with 128 bytes in length.

The first memory write takes place around 205 us. The 10 memory writes and 10 memory reads with completions from the RP BFM appear shortly after the memory write requests at the Avalon-ST RX interface.

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