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Bastien Curutchet says: ==================== net: dsa: microchip: Remove one indirection layer This series follows the discussions we had on a previous series that aimed to add PTP support for the KSZ8463 (cf [1]). The KSZ driver got way too convoluted over time because it uses a common framework to handle more than 20 switches split in 5 families (see below table) +----------+---------+---------+---------+---------+---------+ | Family | KSZ8463 | KSZ87xx | KSZ88xx | KSZ9477 | LAN937X | +----------+---------+---------+---------+---------+---------+ | Switches | KSZ8463 | KSZ8795 | KSZ88X3 | KSZ8563 | LAN9370 | | | | KSZ8794 | KSZ8864 | KSZ9477 | LAN9371 | | | | KSZ8765 | KSZ8895 | KSZ9896 | LAN9372 | | | | | | KSZ9897 | LAN9373 | | | | | | KSZ9893 | LAN9374 | | | | | | KSZ9563 | | | | | | | KSZ8567 | | | | | | | KSZ9567 | | | | | | | LAN9646 | | +----------+---------+---------+---------+---------+---------+ A unique struct dsa_switch_ops is used by all the switches. Next to it, each switch family has its own struct ksz_dev_ops with family-specific callbacks. So the dsa_switch_ops operations handle the specificities of each family through these ksz_dev_ops callbacks and/or conditional branches based on the chip ID. Vladimir initiated a rework of the driver ([2]) which I carried on. On top of the rework I added PTP and periodic output support for the KSZ8463 (which was my first goal). There are more than 60 patches for all this so this series will be followed by several others and if you want to see the full picture we can check my github ([3]). This first series aims to split the unique struct dsa_switch_ops into 5 so each switch family will be able to implement its own set of DSA operations. I haven't finished yet to group all the patches into meaningful series but here is more or less what I plan to do next: - A series will remove from the struct ksz_dev_ops the callbacks that have an equivalent in dsa_switch_ops to remove one level of indirection. - A series will split again some operations to get rid of the if (is_kszXYZ) branches. - Maybe a fourth one will be needed to completely move out of ksz_common.c everything that isn't truly common to all the switches - A series will add PTP support for the KSZ8463 - A final series will add periodic output support for the KSZ8463 [1]: https://lore.kernel.org/r/20260304-ksz8463-ptp-v6-0-3f4c47954c71@bootlin.com) [2]: https://github.com/vladimiroltean/linux/tree/ksz_separate_dsa_switch_ops [3]: https://github.com/bastien-curutchet/linux/tree/ksz_rework ==================== Link: https://patch.msgid.link/20260505-clean-ksz-driver-v1-0-05d70fa42461@bootlin.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> |
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Linux kernel ============ The Linux kernel is the core of any Linux operating system. It manages hardware, system resources, and provides the fundamental services for all other software. Quick Start ----------- * Report a bug: See Documentation/admin-guide/reporting-issues.rst * Get the latest kernel: https://kernel.org * Build the kernel: See Documentation/admin-guide/quickly-build-trimmed-linux.rst * Join the community: https://lore.kernel.org/ Essential Documentation ----------------------- All users should be familiar with: * Building requirements: Documentation/process/changes.rst * Code of Conduct: Documentation/process/code-of-conduct.rst * License: See COPYING Documentation can be built with make htmldocs or viewed online at: https://www.kernel.org/doc/html/latest/ Who Are You? ============ Find your role below: * New Kernel Developer - Getting started with kernel development * Academic Researcher - Studying kernel internals and architecture * Security Expert - Hardening and vulnerability analysis * Backport/Maintenance Engineer - Maintaining stable kernels * System Administrator - Configuring and troubleshooting * Maintainer - Leading subsystems and reviewing patches * Hardware Vendor - Writing drivers for new hardware * Distribution Maintainer - Packaging kernels for distros * AI Coding Assistant - LLMs and AI-powered development tools For Specific Users ================== New Kernel Developer -------------------- Welcome! Start your kernel development journey here: * Getting Started: Documentation/process/development-process.rst * Your First Patch: Documentation/process/submitting-patches.rst * Coding Style: Documentation/process/coding-style.rst * Build System: Documentation/kbuild/index.rst * Development Tools: Documentation/dev-tools/index.rst * Kernel Hacking Guide: Documentation/kernel-hacking/hacking.rst * Core APIs: Documentation/core-api/index.rst Academic Researcher ------------------- Explore the kernel's architecture and internals: * Researcher Guidelines: Documentation/process/researcher-guidelines.rst * Memory Management: Documentation/mm/index.rst * Scheduler: Documentation/scheduler/index.rst * Networking Stack: Documentation/networking/index.rst * Filesystems: Documentation/filesystems/index.rst * RCU (Read-Copy Update): Documentation/RCU/index.rst * Locking Primitives: Documentation/locking/index.rst * Power Management: Documentation/power/index.rst Security Expert --------------- Security documentation and hardening guides: * Security Documentation: Documentation/security/index.rst * LSM Development: Documentation/security/lsm-development.rst * Self Protection: Documentation/security/self-protection.rst * Reporting Vulnerabilities: Documentation/process/security-bugs.rst * CVE Procedures: Documentation/process/cve.rst * Embargoed Hardware Issues: Documentation/process/embargoed-hardware-issues.rst * Security Features: Documentation/userspace-api/seccomp_filter.rst Backport/Maintenance Engineer ----------------------------- Maintain and stabilize kernel versions: * Stable Kernel Rules: Documentation/process/stable-kernel-rules.rst * Backporting Guide: Documentation/process/backporting.rst * Applying Patches: Documentation/process/applying-patches.rst * Subsystem Profile: Documentation/maintainer/maintainer-entry-profile.rst * Git for Maintainers: Documentation/maintainer/configure-git.rst System Administrator -------------------- Configure, tune, and troubleshoot Linux systems: * Admin Guide: Documentation/admin-guide/index.rst * Kernel Parameters: Documentation/admin-guide/kernel-parameters.rst * Sysctl Tuning: Documentation/admin-guide/sysctl/index.rst * Tracing/Debugging: Documentation/trace/index.rst * Performance Security: Documentation/admin-guide/perf-security.rst * Hardware Monitoring: Documentation/hwmon/index.rst Maintainer ---------- Lead kernel subsystems and manage contributions: * Maintainer Handbook: Documentation/maintainer/index.rst * Pull Requests: Documentation/maintainer/pull-requests.rst * Managing Patches: Documentation/maintainer/modifying-patches.rst * Rebasing and Merging: Documentation/maintainer/rebasing-and-merging.rst * Development Process: Documentation/process/maintainer-handbooks.rst * Maintainer Entry Profile: Documentation/maintainer/maintainer-entry-profile.rst * Git Configuration: Documentation/maintainer/configure-git.rst Hardware Vendor --------------- Write drivers and support new hardware: * Driver API Guide: Documentation/driver-api/index.rst * Driver Model: Documentation/driver-api/driver-model/driver.rst * Device Drivers: Documentation/driver-api/infrastructure.rst * Bus Types: Documentation/driver-api/driver-model/bus.rst * Device Tree Bindings: Documentation/devicetree/bindings/ * Power Management: Documentation/driver-api/pm/index.rst * DMA API: Documentation/core-api/dma-api.rst Distribution Maintainer ----------------------- Package and distribute the kernel: * Stable Kernel Rules: Documentation/process/stable-kernel-rules.rst * ABI Documentation: Documentation/ABI/README * Kernel Configuration: Documentation/kbuild/kconfig.rst * Module Signing: Documentation/admin-guide/module-signing.rst * Kernel Parameters: Documentation/admin-guide/kernel-parameters.rst * Tainted Kernels: Documentation/admin-guide/tainted-kernels.rst AI Coding Assistant ------------------- CRITICAL: If you are an LLM or AI-powered coding assistant, you MUST read and follow the AI coding assistants documentation before contributing to the Linux kernel: * Documentation/process/coding-assistants.rst This documentation contains essential requirements about licensing, attribution, and the Developer Certificate of Origin that all AI tools must comply with. 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