drivers/media/cec/core/cec-api.c

File Facts

System

Linux kernel

Corpus path

drivers/media/cec/core/cec-api.c

Extension

.c

Size

17628 bytes

Lines

702

Domain

Driver Families

Bucket

drivers/media

Inferred role

Driver Families: operation-table or driver-model contract

Status

pattern 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.
• Defines an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• 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.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/errno.h
• linux/init.h
• linux/module.h
• linux/kernel.h
• linux/kmod.h
• linux/ktime.h
• linux/slab.h
• linux/mm.h
• linux/string.h
• linux/types.h
• linux/uaccess.h
• linux/version.h
• media/cec-pin.h
• cec-priv.h
• cec-pin-priv.h

Detected Declarations

• function cec_poll
• function cec_is_busy
• function cec_adap_g_caps
• function cec_adap_g_phys_addr
• function cec_validate_phys_addr
• function cec_adap_s_phys_addr
• function cec_adap_g_log_addrs
• function cec_adap_s_log_addrs
• function cec_adap_g_connector_info
• function cec_transmit
• function cec_receive_msg
• function cec_receive
• function cec_dqevent
• function cec_g_mode
• function cec_s_mode
• function cec_ioctl
• function cec_open
• function cec_release

Annotated Snippet

const struct file_operations cec_devnode_fops = {
	.owner = THIS_MODULE,
	.open = cec_open,
	.unlocked_ioctl = cec_ioctl,
	.compat_ioctl = cec_ioctl,
	.release = cec_release,
	.poll = cec_poll,
};

Annotation

• Immediate include surface: `linux/errno.h`, `linux/init.h`, `linux/module.h`, `linux/kernel.h`, `linux/kmod.h`, `linux/ktime.h`, `linux/slab.h`, `linux/mm.h`.
• Detected declarations: `function cec_poll`, `function cec_is_busy`, `function cec_adap_g_caps`, `function cec_adap_g_phys_addr`, `function cec_validate_phys_addr`, `function cec_adap_s_phys_addr`, `function cec_adap_g_log_addrs`, `function cec_adap_s_log_addrs`, `function cec_adap_g_connector_info`, `function cec_transmit`.
• Atlas domain: Driver Families / drivers/media.
• Implementation status: pattern 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.