SPRADH9 June   2024 AM6442

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Abbreviations
  5. 2Introduction
    1. 2.1 Peripheral Component Interconnect Express
      1. 2.1.1 Components of PCIe Communication
        1. 2.1.1.1 Root Complex
        2. 2.1.1.2 Repeater
        3. 2.1.1.3 Endpoints
      2. 2.1.2 Signaling
        1. 2.1.2.1 PERST
        2. 2.1.2.2 WAKE and CLKREQ
        3. 2.1.2.3 REFCLK
      3. 2.1.3 PCIe Common Usage
      4. 2.1.4 PCIe Aggregate Throughput
    2. 2.2 PCIe Features on AM64x and AM243x
  6. 3X86 as RC and AM64x as EP
    1. 3.1 Hardware Environment
    2. 3.2 Software Environment
      1. 3.2.1 Building Application
      2. 3.2.2 Usage
  7. 4Test Setup
    1. 4.1 Common Setup for LINUX and WIN
    2. 4.2 Linux Driver (VFIO)
      1. 4.2.1 Prerequisites
      2. 4.2.2 Building
      3. 4.2.3 Deploying
    3. 4.3 Test Application Usage
    4. 4.4 Setup Steps for LINUX PC
      1. 4.4.1 UART Console Output
    5. 4.5 MSI Example
    6. 4.6 Setup Steps for WINDOWS PC
      1. 4.6.1 Prerequisites
      2. 4.6.2 Building
      3. 4.6.3 Deploying
  8. 5PCIe Test Specification
    1. 5.1  Identification and Configuration Functionalities
      1. 5.1.1 Test Case
    2. 5.2  Reference Clock Functionalities
    3. 5.3  Inbound ATU and BAR Functionalities
    4. 5.4  Outbound ATU Functionalities
    5. 5.5  MSI Functionality
    6. 5.6  Downstream Interrupt Functionality
    7. 5.7  Device Power Management State Functionality
    8. 5.8  Function Level Reset Mechanism
    9. 5.9  Legacy Interrupt Mechanism
    10. 5.10 MSI-X Capability
    11. 5.11 Hot Reset Mechanism
  9. 6Windows Example Driver Verification
  10. 7References

3.1 Hardware Environment

The following hardware is used to perform the specified function tests:

  • x86 system with an available PCIe slot
    • The PCIe slot does NOT need to be connected to a PCIe switch but needs to rather be connected directly to the x86 CPU or PCH.
    • For development and testing the following systems have been used:
AM6442
  • The x86 needs to be installed with a recent Linux version that supports VFIO, VFIO-PCI and IOMMU.
AM6442
AM6442
  • TMDS243EVM or TMDS64EVM: is termed as a single EVM going forward
  • PCIE_FLEX_NOCLK: Adex Electronics PCIe flexible extender cable PE-FLEX1-G2.MMCX-12-TI1
  • PCIE_FLEX_CLK: Modified Adex Electronics PCIe flexible extender cable PE-FLEX1-G2.MMCX-12-TI1 with connected reference clock REFCLK+/-
  • SPEC_ANA: Spectrum Analyzer
  • The AM24x EVM needs to be modified to support a common reference clock for PCIe: - remove Resistors R661, R662, R667 & R668 - populate Resistors R665, R666, R679 & R680 (all 0 ohm)