PCI device lead Engineer

Job Title: Linux PCI Device Lead

Experience: 8 to 10+ years

Key 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 Optimisation:
• Analyse 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, and pcie_check.
• Expertise in power management (runtime, suspend/resume flows) for PCI devices.
• Experience with Secure Boot, TrustZone, and virtualisation passthrough (VFIO/SR-IOV) for PCIe devices is a strong plus.
• Experience using Yocto, Buildroot, or other embedded Linux build systems.