Linux PCI Device Lead

5 days ago

Hyderabad, Telangana, India People Tech Full time

Role & responsibilities

  • • Architect and Lead PCI Subsystem Development:
  • • Drive design, development, and maintenance of PCI and PCIe subsystems and drivers in the Linux kernel.
  • • Ensure seamless enumeration, configuration, power management, and hotplug support for PCI devices.
  • • Device Enablement and Bring-up:
  • • Lead platform bring-up activities involving PCI/PCIe devices (e.g., network, storage, GPU, NVMe).
  • • Validate and debug device-tree or ACPI configurations for PCI host bridges and endpoints.
  • • Kernel and Firmware Interaction:
  • • Collaborate with firmware/bootloader teams for correct BAR, MSI/MSI-X, and IOMMU configurations.
  • • Work closely with architecture teams to support secure boot and DMA protection for PCI devices.
  • • Performance and Power Optimization:
  • • Analyze PCI bandwidth, latency, and power bottlenecks.
  • • Implement ASPM, LTR, and other low-power states in compliance with PCIe specs.
  • • Debugging and Issue Resolution:
  • • Use Linux tools (lspci, setpci, tracepoints, ftrace, perf, etc.) and oscilloscopes/analyzers for low-level debugging.
  • • Root-cause platform PCI failures and compatibility issues across hardware and kernel versions.
  • • Upstream and Compliance:
  • • Contribute patches upstream to the Linux kernel PCI subsystem.
  • • Ensure compliance with PCI-SIG and Linux kernel community best practices.
  • • Cross-Team Collaboration:
  • Interface with SoC, BIOS/UEFI, board, and validation teams to ensure robust PCIe device support across platforms

Required Expertise:


• Deep understanding of Linux kernel internals, especially drivers/pci and subsystems like hot plug, MSI, IOMMU, DMA API.


• Hands-on experience with PCIe Gen3/Gen4/Gen5 devices and related PHY bring-up issues.


• Familiarity with ARM64 and x86 architectures, DT/ACPI handling for PCI devices.


• Proficient in C programming, Linux kernel debugging (GDB, crash dumps), and tools like dmesg, lspci, pcie_check.


• Expertise in power management (runtime, suspend/resume flows) for PCI devices.


• Experience with Secure Boot, TrustZone, and virtualization passthrough (VFIO/SR-IOV) for PCIe devices is a strong plus.


• Experience using Yocto, Buildroot, or other embedded Linux build systems

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