drivers/video/fbdev/ffb.c

File Facts

System

Linux kernel

Corpus path

drivers/video/fbdev/ffb.c

Extension

.c

Size

25184 bytes

Lines

1091

Domain

Driver Families

Bucket

drivers/video

Inferred role

Driver Families: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Touches user memory; correctness depends on fault-safe copying and privilege boundary handling.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/module.h
• linux/kernel.h
• linux/errno.h
• linux/string.h
• linux/delay.h
• linux/init.h
• linux/fb.h
• linux/mm.h
• linux/timer.h
• linux/of.h
• linux/platform_device.h
• asm/io.h
• asm/upa.h
• asm/fbio.h
• sbuslib.h

Detected Declarations

• struct ffb_fbc
• struct ffb_dac
• struct ffb_par
• function FFBFifo
• function FFBWait
• function ffb_sync
• function ffb_rop
• function ffb_switch_from_graph
• function ffb_pan_display
• function ffb_fillrect
• function ffb_copyarea
• function ffb_imageblit
• function ffb_fixup_var_rgb
• function ffb_setcolreg
• function ffb_blank
• function ffb_sbusfb_mmap
• function ffb_sbusfb_ioctl
• function ffb_init_fix
• function ffb_probe
• function ffb_remove
• function ffb_init
• function ffb_exit
• module init ffb_init

Annotated Snippet

module_init(ffb_init);
module_exit(ffb_exit);

MODULE_DESCRIPTION("framebuffer driver for Creator/Elite3D chipsets");
MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
MODULE_VERSION("2.0");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/module.h`, `linux/kernel.h`, `linux/errno.h`, `linux/string.h`, `linux/delay.h`, `linux/init.h`, `linux/fb.h`, `linux/mm.h`.
• Detected declarations: `struct ffb_fbc`, `struct ffb_dac`, `struct ffb_par`, `function FFBFifo`, `function FFBWait`, `function ffb_sync`, `function ffb_rop`, `function ffb_switch_from_graph`, `function ffb_pan_display`, `function ffb_fillrect`.
• Atlas domain: Driver Families / drivers/video.
• Implementation status: integration implementation candidate.
• This snippet crosses the user/kernel memory boundary; validate fault handling and access checks before translating the pattern.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.