drivers/video/fbdev/cg3.c

File Facts

System

Linux kernel

Corpus path

drivers/video/fbdev/cg3.c

Extension

.c

Size

11402 bytes

Lines

484

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/of.h
• linux/platform_device.h
• asm/io.h
• asm/fbio.h
• sbuslib.h

Detected Declarations

• struct bt_regs
• struct cg3_regs
• struct cg3_par
• enum cg3_type
• function cg3_setcolreg
• function cg3_blank
• function cg3_sbusfb_mmap
• function cg3_sbusfb_ioctl
• function cg3_init_fix
• function cg3_rdi_maybe_fixup_var
• function cg3_do_default_mode
• function cg3_probe
• function cg3_remove
• function cg3_init
• function cg3_exit
• module init cg3_init

Annotated Snippet

module_init(cg3_init);
module_exit(cg3_exit);

MODULE_DESCRIPTION("framebuffer driver for CGthree 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 bt_regs`, `struct cg3_regs`, `struct cg3_par`, `enum cg3_type`, `function cg3_setcolreg`, `function cg3_blank`, `function cg3_sbusfb_mmap`, `function cg3_sbusfb_ioctl`, `function cg3_init_fix`, `function cg3_rdi_maybe_fixup_var`.
• 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.