drivers/s390/char/tape_core.c

File Facts

System

Linux kernel

Corpus path

drivers/s390/char/tape_core.c

Extension

.c

Size

34151 bytes

Lines

1361

Domain

Driver Families

Bucket

drivers/s390

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/export.h
• linux/module.h
• linux/init.h
• linux/kmod.h
• linux/spinlock.h
• linux/vmalloc.h
• linux/list.h
• linux/slab.h
• asm/types.h
• tape.h
• tape_std.h
• tape_class.h

Detected Declarations

• struct tape_med_state_work_data
• function devid_to_int
• function tape_medium_state_show
• function tape_first_minor_show
• function tape_state_show
• function tape_operation_show
• function tape_blocksize_show
• function tape_state_set
• function tape_med_state_work_handler
• function tape_med_state_work
• function tape_med_state_set
• function __tape_cancel_io
• function tape_assign_minor
• function tape_remove_minor
• function error
• function tape_cleanup_device
• function tape_generic_offline
• function tape_alloc_device
• function tape_get_device
• function tape_put_device
• function tape_find_device
• function tape_generic_probe
• function __tape_discard_requests
• function list_for_each_safe
• function tape_generic_remove
• function tape_alloc_request
• function tape_free_request
• function tape_check_idalbuffer
• function __tape_start_io
• function __tape_start_next_request
• function tape_delayed_next_request
• function tape_long_busy_timeout
• function __tape_end_request
• function tape_dump_sense_dbf
• function __tape_start_request
• function tape_do_io_async
• function __tape_wake_up
• function tape_do_io
• function __tape_wake_up_interruptible
• function tape_do_io_interruptible
• function tape_cancel_io
• function __tape_do_irq
• function tape_open
• function tape_release
• function tape_mtop
• function tape_init
• function tape_exit
• module init tape_init

Annotated Snippet

module_init(tape_init);
module_exit(tape_exit);

EXPORT_SYMBOL(tape_generic_remove);
EXPORT_SYMBOL(tape_generic_probe);
EXPORT_SYMBOL(tape_generic_online);
EXPORT_SYMBOL(tape_generic_offline);
EXPORT_SYMBOL(tape_put_device);
EXPORT_SYMBOL(tape_get_device);
EXPORT_SYMBOL(tape_state_verbose);
EXPORT_SYMBOL(tape_op_verbose);
EXPORT_SYMBOL(tape_state_set);
EXPORT_SYMBOL(tape_med_state_set);
EXPORT_SYMBOL(tape_alloc_request);
EXPORT_SYMBOL(tape_free_request);
EXPORT_SYMBOL(tape_dump_sense_dbf);
EXPORT_SYMBOL(tape_do_io);
EXPORT_SYMBOL(tape_do_io_async);
EXPORT_SYMBOL(tape_do_io_interruptible);
EXPORT_SYMBOL(tape_cancel_io);
EXPORT_SYMBOL(tape_mtop);

Annotation

• Immediate include surface: `linux/export.h`, `linux/module.h`, `linux/init.h`, `linux/kmod.h`, `linux/spinlock.h`, `linux/vmalloc.h`, `linux/list.h`, `linux/slab.h`.
• Detected declarations: `struct tape_med_state_work_data`, `function devid_to_int`, `function tape_medium_state_show`, `function tape_first_minor_show`, `function tape_state_show`, `function tape_operation_show`, `function tape_blocksize_show`, `function tape_state_set`, `function tape_med_state_work_handler`, `function tape_med_state_work`.
• Atlas domain: Driver Families / drivers/s390.
• 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.