How kunalsingh0720/linux works
Linux is an operating-system kernel: user processes request services through system calls, while kernel subsystems coordinate hardware access and return results. The sampled files show several distinct paths—DMA-backed IIO buffering, asynchronous crypto requests, USB mass-storage emulation, SPI transfers, graphics display/GPU engines, and an s390 guarded-storage syscall—rather than a complete kernel tree. Edges reflect explicit interactions in the excerpts or the DMA framework’s documented role; unsampled subsystem wiring is omitted.
Main entry points: dmaengine.c DMAengine core · industrialio-buffer-dmaengine.c DMA clients · ccp-dmaengine.c CCP DMA driver · ptdma-dmaengine.c PTDMA driver
Components 22
DMA and IIO
- DMA clients
drivers/iio/buffer/industrialio-buffer-dmaengine.c - DMAengine core
drivers/dma/dmaengine.c - DMA hardware
- CCP DMA driver
drivers/crypto/ccp/ccp-dmaengine.c - PTDMA driver
drivers/dma/amd/ptdma/ptdma-dmaengine.c
Crypto engines
- Crypto engine queue
crypto/crypto_engine.c - Crypto algorithms
Device I/O
- USB mass storage
drivers/usb/gadget/function/f_mass_storage.c - USB host
- SPI Engine driver
drivers/spi/spi-axi-spi-engine.c - SPI device
- APU board GPIO
drivers/platform/x86/pcengines-apuv2.c - Board GPIO devices
Graphics
- Komeda pipeline
drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c - Display hardware
- i915 engines
drivers/gpu/drm/i915/gt/intel_engine_cs.c - Xe engines
drivers/gpu/drm/xe/xe_hw_engine.c - GPU hardware
Architecture services
- Guarded storage
arch/s390/kernel/guarded_storage.c - s390 CPU
Other components
- User process
- System calls
Connections 17
- User process → System calls: invokes
- System calls → Guarded storage: dispatches
- Guarded storage → s390 CPU: controls
- DMA clients → DMAengine core: requests channels
- DMAengine core → CCP DMA driver: registers provider
- DMAengine core → PTDMA driver: registers provider
- CCP DMA driver → DMA hardware: submits commands
- PTDMA driver → DMA hardware: submits commands
- DMA clients → DMA hardware: transfers samples
- Crypto algorithms → Crypto engine queue: queues requests
- Crypto engine queue → Crypto algorithms: completes requests
- USB mass storage → USB host: serves USB requests
- SPI Engine driver → SPI device: transfers messages
- APU board GPIO → Board GPIO devices: registers GPIO devices
- Komeda pipeline → Display hardware: updates pipeline
- i915 engines → GPU hardware: programs engines
- Xe engines → GPU hardware: programs engines