How ahmedelhosseiny/linux works
Linux is an operating-system kernel: it mediates between applications and hardware while providing system services and device support. The supplied tree and excerpts highlight several concrete branches—DMA, hardware crypto, graphics, camera pipelines, USB mass storage, and SoundWire—rather than a complete map of kernel subsystems. Edges are limited to relationships explicitly shown in the excerpts or SOURCE INDEX; unsampled areas are represented only where their paths are present.
Main entry points: f_mass_storage.c USB mass storage · dmaengine.c DMA framework · mass_storage.c Legacy gadget setup · main.c Kernel services
Components 19
Kernel foundations
- Kernel services
init/main.c - DMA framework
drivers/dma/dmaengine.c
Compute and graphics
- Crypto engine
crypto/crypto_engine.c - Intel QAT firmware
drivers/crypto/intel/qat/qat_common/adf_accel_engine.c - CCP DMA driver
drivers/crypto/ccp/ccp-dmaengine.c - AMD PTDMA driver
drivers/dma/amd/ptdma/ptdma-dmaengine.c - Intel i915 engines
drivers/gpu/drm/i915/gt/intel_engine_cs.c - Intel Xe engines
drivers/gpu/drm/xe/xe_hw_engine.c - Komeda pipeline
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
Device I/O
- AtomISP pipeline
drivers/staging/media/atomisp/pci/runtime/pipeline/src/pipeline.c - USB mass storage
drivers/usb/gadget/function/f_mass_storage.c - Storage helpers
drivers/usb/gadget/function/storage_common.h - Legacy gadget setup
drivers/usb/gadget/legacy/mass_storage.c - AMD SoundWire
drivers/soundwire/amd_manager.c
Platform support
- s390 guarded storage
arch/s390/kernel/guarded_storage.c - Alpha boot
arch/alpha/boot/main.c - ARM setup
arch/arm/kernel/setup.c - ARC setup
arch/arc/kernel/setup.c
Other components
- Applications
Connections 4
- Applications → Kernel services: uses services
README - DMA framework → AMD PTDMA driver: provides API
- Legacy gadget setup → USB mass storage: uses function
drivers/usb/gadget/legacy/mass_storage.c - USB mass storage → Storage helpers: uses helpers
drivers/usb/gadget/function/f_mass_storage.c