drivers/s390/cio/vfio_ccw_drv.c

File Facts

System

Linux kernel

Corpus path

drivers/s390/cio/vfio_ccw_drv.c

Extension

.c

Size

12353 bytes

Lines

493

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/module.h
• linux/init.h
• linux/slab.h
• linux/mdev.h
• asm/isc.h
• chp.h
• ioasm.h
• css.h
• vfio_ccw_private.h

Detected Declarations

• function vfio_ccw_sch_quiesce
• function vfio_ccw_sch_io_todo
• function vfio_ccw_crw_todo
• function vfio_ccw_sch_irq
• function vfio_ccw_free_parent
• function vfio_ccw_sch_probe
• function vfio_ccw_sch_remove
• function vfio_ccw_sch_shutdown
• function vfio_ccw_sch_event
• function vfio_ccw_queue_crw
• function vfio_ccw_chp_event
• function vfio_ccw_debug_init
• function vfio_ccw_debug_exit
• function vfio_ccw_destroy_regions
• function vfio_ccw_sch_init
• function vfio_ccw_sch_exit
• module init vfio_ccw_sch_init

Annotated Snippet

module_init(vfio_ccw_sch_init);
module_exit(vfio_ccw_sch_exit);

MODULE_DESCRIPTION("VFIO based Subchannel device driver");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/module.h`, `linux/init.h`, `linux/slab.h`, `linux/mdev.h`, `asm/isc.h`, `chp.h`, `ioasm.h`, `css.h`.
• Detected declarations: `function vfio_ccw_sch_quiesce`, `function vfio_ccw_sch_io_todo`, `function vfio_ccw_crw_todo`, `function vfio_ccw_sch_irq`, `function vfio_ccw_free_parent`, `function vfio_ccw_sch_probe`, `function vfio_ccw_sch_remove`, `function vfio_ccw_sch_shutdown`, `function vfio_ccw_sch_event`, `function vfio_ccw_queue_crw`.
• 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.