drivers/s390/block/dasd_diag.c

File Facts

System

Linux kernel

Corpus path

drivers/s390/block/dasd_diag.c

Extension

.c

Size

18728 bytes

Lines

681

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/kernel_stat.h
• linux/stddef.h
• linux/kernel.h
• linux/slab.h
• linux/hdreg.h
• linux/bio.h
• linux/module.h
• linux/init.h
• linux/jiffies.h
• asm/asm-extable.h
• asm/machine.h
• asm/dasd.h
• asm/debug.h
• asm/diag.h
• asm/ebcdic.h
• linux/io.h
• asm/irq.h
• asm/vtoc.h
• asm/asm.h
• dasd_int.h
• dasd_diag.h

Detected Declarations

• struct dasd_diag_private
• struct dasd_diag_req
• function __dia250
• function dia250
• function mdsk_init_io
• function mdsk_term_io
• function dasd_diag_erp
• function dasd_start_diag
• function dasd_diag_term_IO
• function dasd_ext_handler
• function dasd_diag_check_device
• function dasd_diag_fill_geometry
• function dasd_diag_erp_action
• function dasd_diag_erp_postaction
• function dasd_diag_free_cp
• function dasd_diag_handle_terminated_request
• function dasd_diag_fill_info
• function dasd_diag_dump_sense
• function dasd_diag_max_sectors
• function dasd_diag_pe_handler
• function dasd_diag_init
• function dasd_diag_cleanup
• module init dasd_diag_init

Annotated Snippet

module_init(dasd_diag_init);
module_exit(dasd_diag_cleanup);

Annotation

• Immediate include surface: `linux/kernel_stat.h`, `linux/stddef.h`, `linux/kernel.h`, `linux/slab.h`, `linux/hdreg.h`, `linux/bio.h`, `linux/module.h`, `linux/init.h`.
• Detected declarations: `struct dasd_diag_private`, `struct dasd_diag_req`, `function __dia250`, `function dia250`, `function mdsk_init_io`, `function mdsk_term_io`, `function dasd_diag_erp`, `function dasd_start_diag`, `function dasd_diag_term_IO`, `function dasd_ext_handler`.
• 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.