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 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 hotplug, 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.
(ref:hirist.tech)
