drivers/ntb/test/ntb_pingpong.c

File Facts

System

Linux kernel

Corpus path

drivers/ntb/test/ntb_pingpong.c

Extension

.c

Size

10626 bytes

Lines

433

Domain

Driver Families

Bucket

drivers/ntb

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/init.h
• linux/kernel.h
• linux/module.h
• linux/device.h
• linux/bitops.h
• linux/pci.h
• linux/slab.h
• linux/hrtimer.h
• linux/debugfs.h
• linux/ntb.h

Detected Declarations

• struct pp_ctx
• function pp_find_next_peer
• function pp_setup
• function pp_clear
• function pp_ping
• function pp_pong
• function pp_timer_func
• function pp_link_event
• function pp_db_event
• function pp_check_ntb
• function pp_init_flds
• function pp_mask_events
• function pp_setup_ctx
• function pp_clear_ctx
• function pp_setup_dbgfs
• function pp_clear_dbgfs
• function pp_probe
• function pp_remove
• function pp_init
• function pp_exit
• module init pp_init

Annotated Snippet

module_init(pp_init);

static void __exit pp_exit(void)
{
	ntb_unregister_client(&pp_client);
	debugfs_remove_recursive(pp_dbgfs_topdir);
}
module_exit(pp_exit);

Annotation

• Immediate include surface: `linux/init.h`, `linux/kernel.h`, `linux/module.h`, `linux/device.h`, `linux/bitops.h`, `linux/pci.h`, `linux/slab.h`, `linux/hrtimer.h`.
• Detected declarations: `struct pp_ctx`, `function pp_find_next_peer`, `function pp_setup`, `function pp_clear`, `function pp_ping`, `function pp_pong`, `function pp_timer_func`, `function pp_link_event`, `function pp_db_event`, `function pp_check_ntb`.
• Atlas domain: Driver Families / drivers/ntb.
• 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.