Linux PCI Device Lead

4 days ago

Hyderabad India TestCore IT Solutions Pvt. Ltd. Full time

Job Description 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 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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