drivers/tty/hvc/hvc_iucv.c

File Facts

System

Linux kernel

Corpus path

drivers/tty/hvc/hvc_iucv.c

Extension

.c

Size

40812 bytes

Lines

1421

Domain

Driver Families

Bucket

drivers/tty

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.
• 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/types.h
• linux/slab.h
• asm/ebcdic.h
• linux/ctype.h
• linux/delay.h
• linux/device.h
• linux/init.h
• linux/mempool.h
• linux/moduleparam.h
• linux/tty.h
• linux/wait.h
• net/iucv/iucv.h
• asm/machine.h
• hvc_console.h

Detected Declarations

• struct iucv_tty_msg
• struct hvc_iucv_private
• struct iucv_tty_buffer
• enum iucv_state_t
• enum tty_state_t
• function hvc_iucv_get_private
• function alloc_tty_buffer
• function destroy_tty_buffer
• function destroy_tty_buffer_list
• function list_for_each_entry_safe
• function hvc_iucv_write
• function hvc_iucv_get_chars
• function hvc_iucv_queue
• function hvc_iucv_send
• function hvc_iucv_sndbuf_work
• function hvc_iucv_put_chars
• function hvc_iucv_notifier_add
• function hvc_iucv_cleanup
• function tty_outqueue_empty
• function flush_sndbuf_sync
• function get_chars
• function hvc_iucv_notifier_hangup
• function hvc_iucv_dtr_rts
• function hvc_iucv_notifier_del
• function hvc_iucv_filter_connreq
• function hvc_iucv_path_pending
• function hvc_iucv_path_severed
• function hvc_iucv_msg_pending
• function hvc_iucv_msg_complete
• function hvc_iucv_dev_termid_show
• function hvc_iucv_dev_state_show
• function hvc_iucv_dev_peer_show
• function hvc_iucv_alloc
• function hvc_iucv_destroy
• function hvc_iucv_parse_filter
• function hvc_iucv_setup_filter
• function param_set_vmidfilter
• function param_get_vmidfilter
• function hvc_iucv_init
• function hvc_iucv_config
• module init hvc_iucv_init

Annotated Snippet

device_initcall(hvc_iucv_init);
__setup("hvc_iucv=", hvc_iucv_config);
core_param(hvc_iucv_allow, hvc_iucv_filter, vmidfilter, 0640);

Annotation

• Immediate include surface: `linux/types.h`, `linux/slab.h`, `asm/ebcdic.h`, `linux/ctype.h`, `linux/delay.h`, `linux/device.h`, `linux/init.h`, `linux/mempool.h`.
• Detected declarations: `struct iucv_tty_msg`, `struct hvc_iucv_private`, `struct iucv_tty_buffer`, `enum iucv_state_t`, `enum tty_state_t`, `function hvc_iucv_get_private`, `function alloc_tty_buffer`, `function destroy_tty_buffer`, `function destroy_tty_buffer_list`, `function list_for_each_entry_safe`.
• Atlas domain: Driver Families / drivers/tty.
• Implementation status: integration implementation candidate.
• 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.