drivers/firewire/core-cdev.c

File Facts

System

Linux kernel

Corpus path

drivers/firewire/core-cdev.c

Extension

.c

Size

52613 bytes

Lines

1989

Domain

Driver Families

Bucket

drivers/firewire

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/bug.h
• linux/compat.h
• linux/delay.h
• linux/device.h
• linux/dma-mapping.h
• linux/err.h
• linux/errno.h
• linux/firewire.h
• linux/firewire-cdev.h
• linux/irqflags.h
• linux/jiffies.h
• linux/kernel.h
• linux/kref.h
• linux/mm.h
• linux/module.h
• linux/mutex.h
• linux/poll.h
• linux/sched.h
• linux/slab.h
• linux/spinlock.h
• linux/string.h
• linux/time.h
• linux/uaccess.h
• linux/vmalloc.h
• linux/wait.h
• linux/workqueue.h
• core.h
• trace/events/firewire.h
• packet-header-definitions.h

Detected Declarations

• struct client
• struct client_resource
• struct client_resource
• struct address_handler_resource
• struct outbound_transaction_resource
• struct inbound_transaction_resource
• struct descriptor_resource
• struct iso_resource_params
• struct iso_resource_auto
• struct iso_resource_once
• struct event
• struct bus_reset_event
• struct outbound_transaction_event
• struct inbound_transaction_event
• struct iso_interrupt_event
• struct iso_interrupt_mc_event
• struct iso_resource_event
• struct outbound_phy_packet_event
• struct inbound_phy_packet_event
• function client_get
• function client_release
• function client_put
• function is_iso_resource_auto
• function is_outbound_transaction_resource
• function schedule_iso_resource_auto
• function uptr_to_u64
• function uptr_to_u64
• function fw_device_op_open
• function queue_event
• function scoped_guard
• function dequeue_event
• function scoped_guard
• function fw_device_op_read
• function fill_bus_reset_event
• function for_each_client
• function queue_bus_reset_event
• function xa_for_each
• function fw_device_cdev_update
• function wake_up_client
• function fw_device_cdev_remove
• function ioctl_get_info
• function scoped_guard
• function add_client_resource
• function release_client_resource
• function scoped_guard
• function release_transaction
• function scoped_guard
• function init_request

Annotated Snippet

const struct file_operations fw_device_ops = {
	.owner		= THIS_MODULE,
	.open		= fw_device_op_open,
	.read		= fw_device_op_read,
	.unlocked_ioctl	= fw_device_op_ioctl,
	.mmap		= fw_device_op_mmap,
	.release	= fw_device_op_release,
	.poll		= fw_device_op_poll,
	.compat_ioctl	= compat_ptr_ioctl,
};

Annotation

• Immediate include surface: `linux/bug.h`, `linux/compat.h`, `linux/delay.h`, `linux/device.h`, `linux/dma-mapping.h`, `linux/err.h`, `linux/errno.h`, `linux/firewire.h`.
• Detected declarations: `struct client`, `struct client_resource`, `struct client_resource`, `struct address_handler_resource`, `struct outbound_transaction_resource`, `struct inbound_transaction_resource`, `struct descriptor_resource`, `struct iso_resource_params`, `struct iso_resource_auto`, `struct iso_resource_once`.
• Atlas domain: Driver Families / drivers/firewire.
• 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.