Linux PCI Device Lead

4 weeks ago

Hyderabad, India QTIMINDS Full time

Job Title: Linux PCI Device Lead

Experience: 8 to 10+ years

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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.

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