# ahmedelhosseiny/linux architecture

> Architecture diagram of the GitHub repository ahmedelhosseiny/linux, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-11-12). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/ahmedelhosseiny/linux
- Repository: https://github.com/ahmedelhosseiny/linux

## Overview

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: [`drivers/usb/gadget/function/f_mass_storage.c`](https://github.com/ahmedelhosseiny/linux/blob/master/drivers/usb/gadget/function/f_mass_storage.c) (USB mass storage), [`drivers/dma/dmaengine.c`](https://github.com/ahmedelhosseiny/linux/blob/master/drivers/dma/dmaengine.c) (DMA framework), [`drivers/usb/gadget/legacy/mass_storage.c`](https://github.com/ahmedelhosseiny/linux/blob/master/drivers/usb/gadget/legacy/mass_storage.c) (Legacy gadget setup), [`init/main.c`](https://github.com/ahmedelhosseiny/linux/blob/master/init/main.c) (Kernel services)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_core["Kernel foundations"]
  node_kernel["Kernel services<br/>[main.c]"]
  node_dma["DMA framework<br/>[dmaengine.c]"]
end

subgraph group_compute["Compute and graphics"]
  node_crypto_engine["Crypto engine<br/>[crypto_engine.c]"]
  node_qat["Intel QAT firmware<br/>[adf_accel_engine.c]"]
  node_ccp_dma["CCP DMA driver<br/>[ccp-dmaengine.c]"]
  node_ptdma["AMD PTDMA driver<br/>[ptdma-dmaengine.c]"]
  node_i915["Intel i915 engines<br/>[intel_engine_cs.c]"]
  node_xe["Intel Xe engines<br/>[xe_hw_engine.c]"]
  node_komeda["Komeda pipeline"]
end

subgraph group_devices["Device I/O"]
  node_atomisp["AtomISP pipeline<br/>[pipeline.c]"]
  node_mass_storage["USB mass storage<br/>[f_mass_storage.c]"]
  node_storage_common["Storage helpers<br/>[storage_common.h]"]
  node_mass_gadget["Legacy gadget setup<br/>[mass_storage.c]"]
  node_soundwire["AMD SoundWire<br/>[amd_manager.c]"]
end

subgraph group_platform["Platform support"]
  node_guarded_storage["s390 guarded storage<br/>[guarded_storage.c]"]
  node_alpha_boot["Alpha boot<br/>[main.c]"]
  node_arm_setup["ARM setup<br/>[setup.c]"]
  node_arc_setup["ARC setup<br/>[setup.c]"]
end

node_apps(("Applications"))

node_apps -->|"uses services"| node_kernel
node_dma -.->|"provides API"| node_ptdma
node_mass_gadget -->|"uses function"| node_mass_storage
node_mass_storage -->|"uses helpers"| node_storage_common

click node_kernel "https://github.com/ahmedelhosseiny/linux/blob/master/init/main.c"
click node_dma "https://github.com/ahmedelhosseiny/linux/blob/master/drivers/dma/dmaengine.c"
click node_crypto_engine "https://github.com/ahmedelhosseiny/linux/blob/master/crypto/crypto_engine.c"
click node_qat "https://github.com/ahmedelhosseiny/linux/blob/master/drivers/crypto/intel/qat/qat_common/adf_accel_engine.c"
click node_ccp_dma "https://github.com/ahmedelhosseiny/linux/blob/master/drivers/crypto/ccp/ccp-dmaengine.c"
click node_ptdma "https://github.com/ahmedelhosseiny/linux/blob/master/drivers/dma/amd/ptdma/ptdma-dmaengine.c"
click node_i915 "https://github.com/ahmedelhosseiny/linux/blob/master/drivers/gpu/drm/i915/gt/intel_engine_cs.c"
click node_xe "https://github.com/ahmedelhosseiny/linux/blob/master/drivers/gpu/drm/xe/xe_hw_engine.c"
click node_komeda "https://github.com/ahmedelhosseiny/linux/blob/master/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c"
click node_atomisp "https://github.com/ahmedelhosseiny/linux/blob/master/drivers/staging/media/atomisp/pci/runtime/pipeline/src/pipeline.c"
click node_mass_storage "https://github.com/ahmedelhosseiny/linux/blob/master/drivers/usb/gadget/function/f_mass_storage.c"
click node_storage_common "https://github.com/ahmedelhosseiny/linux/blob/master/drivers/usb/gadget/function/storage_common.h"
click node_mass_gadget "https://github.com/ahmedelhosseiny/linux/blob/master/drivers/usb/gadget/legacy/mass_storage.c"
click node_soundwire "https://github.com/ahmedelhosseiny/linux/blob/master/drivers/soundwire/amd_manager.c"
click node_guarded_storage "https://github.com/ahmedelhosseiny/linux/blob/master/arch/s390/kernel/guarded_storage.c"
click node_alpha_boot "https://github.com/ahmedelhosseiny/linux/blob/master/arch/alpha/boot/main.c"
click node_arm_setup "https://github.com/ahmedelhosseiny/linux/blob/master/arch/arm/kernel/setup.c"
click node_arc_setup "https://github.com/ahmedelhosseiny/linux/blob/master/arch/arc/kernel/setup.c"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_kernel,node_dma toneBlue
class node_crypto_engine,node_qat,node_ccp_dma,node_ptdma,node_i915,node_xe,node_komeda toneAmber
class node_atomisp,node_mass_storage,node_storage_common,node_mass_gadget,node_soundwire toneMint
class node_guarded_storage,node_alpha_boot,node_arm_setup,node_arc_setup toneRose
class node_apps toneIndigo
```

## Components

### Kernel foundations

- [Kernel services](https://github.com/ahmedelhosseiny/linux/blob/master/init/main.c): `init/main.c`
- [DMA framework](https://github.com/ahmedelhosseiny/linux/blob/master/drivers/dma/dmaengine.c): `drivers/dma/dmaengine.c`

### Compute and graphics

- [Crypto engine](https://github.com/ahmedelhosseiny/linux/blob/master/crypto/crypto_engine.c): `crypto/crypto_engine.c`
- [Intel QAT firmware](https://github.com/ahmedelhosseiny/linux/blob/master/drivers/crypto/intel/qat/qat_common/adf_accel_engine.c): `drivers/crypto/intel/qat/qat_common/adf_accel_engine.c`
- [CCP DMA driver](https://github.com/ahmedelhosseiny/linux/blob/master/drivers/crypto/ccp/ccp-dmaengine.c): `drivers/crypto/ccp/ccp-dmaengine.c`
- [AMD PTDMA driver](https://github.com/ahmedelhosseiny/linux/blob/master/drivers/dma/amd/ptdma/ptdma-dmaengine.c): `drivers/dma/amd/ptdma/ptdma-dmaengine.c`
- [Intel i915 engines](https://github.com/ahmedelhosseiny/linux/blob/master/drivers/gpu/drm/i915/gt/intel_engine_cs.c): `drivers/gpu/drm/i915/gt/intel_engine_cs.c`
- [Intel Xe engines](https://github.com/ahmedelhosseiny/linux/blob/master/drivers/gpu/drm/xe/xe_hw_engine.c): `drivers/gpu/drm/xe/xe_hw_engine.c`
- [Komeda pipeline](https://github.com/ahmedelhosseiny/linux/blob/master/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c): `drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c`

### Device I/O

- [AtomISP pipeline](https://github.com/ahmedelhosseiny/linux/blob/master/drivers/staging/media/atomisp/pci/runtime/pipeline/src/pipeline.c): `drivers/staging/media/atomisp/pci/runtime/pipeline/src/pipeline.c`
- [USB mass storage](https://github.com/ahmedelhosseiny/linux/blob/master/drivers/usb/gadget/function/f_mass_storage.c): `drivers/usb/gadget/function/f_mass_storage.c`
- [Storage helpers](https://github.com/ahmedelhosseiny/linux/blob/master/drivers/usb/gadget/function/storage_common.h): `drivers/usb/gadget/function/storage_common.h`
- [Legacy gadget setup](https://github.com/ahmedelhosseiny/linux/blob/master/drivers/usb/gadget/legacy/mass_storage.c): `drivers/usb/gadget/legacy/mass_storage.c`
- [AMD SoundWire](https://github.com/ahmedelhosseiny/linux/blob/master/drivers/soundwire/amd_manager.c): `drivers/soundwire/amd_manager.c`

### Platform support

- [s390 guarded storage](https://github.com/ahmedelhosseiny/linux/blob/master/arch/s390/kernel/guarded_storage.c): `arch/s390/kernel/guarded_storage.c`
- [Alpha boot](https://github.com/ahmedelhosseiny/linux/blob/master/arch/alpha/boot/main.c): `arch/alpha/boot/main.c`
- [ARM setup](https://github.com/ahmedelhosseiny/linux/blob/master/arch/arm/kernel/setup.c): `arch/arm/kernel/setup.c`
- [ARC setup](https://github.com/ahmedelhosseiny/linux/blob/master/arch/arc/kernel/setup.c): `arch/arc/kernel/setup.c`

### Other components

- **Applications**

## Connections

- Applications → Kernel services: uses services (evidence: `README`)
- DMA framework → AMD PTDMA driver: provides API
- Legacy gadget setup → USB mass storage: uses function (evidence: `drivers/usb/gadget/legacy/mass_storage.c`)
- USB mass storage → Storage helpers: uses helpers (evidence: `drivers/usb/gadget/function/f_mass_storage.c`)