Linux PCI Device Lead

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