drivers/perf/marvell_pem_pmu.c

File Facts

System

Linux kernel

Corpus path

drivers/perf/marvell_pem_pmu.c

Extension

.c

Size

10665 bytes

Lines

426

Domain

Driver Families

Bucket

drivers/perf

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.
• 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/acpi.h
• linux/init.h
• linux/io.h
• linux/module.h
• linux/perf_event.h
• linux/platform_device.h

Detected Declarations

• struct pem_pmu
• enum pem_events
• function eventid_to_offset
• function pem_pmu_event_show
• function pem_perf_cpumask_show
• function pem_perf_event_init
• function for_each_sibling_event
• function pem_perf_read_counter
• function pem_perf_event_update
• function pem_perf_event_start
• function pem_perf_event_add
• function pem_perf_event_stop
• function pem_perf_event_del
• function pem_pmu_offline_cpu
• function pem_perf_probe
• function pem_perf_remove
• function pem_pmu_init
• function pem_pmu_exit
• module init pem_pmu_init

Annotated Snippet

module_init(pem_pmu_init);
module_exit(pem_pmu_exit);

MODULE_DESCRIPTION("Marvell PEM Perf driver");
MODULE_AUTHOR("Gowthami Thiagarajan <gthiagarajan@marvell.com>");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/acpi.h`, `linux/init.h`, `linux/io.h`, `linux/module.h`, `linux/perf_event.h`, `linux/platform_device.h`.
• Detected declarations: `struct pem_pmu`, `enum pem_events`, `function eventid_to_offset`, `function pem_pmu_event_show`, `function pem_perf_cpumask_show`, `function pem_perf_event_init`, `function for_each_sibling_event`, `function pem_perf_read_counter`, `function pem_perf_event_update`, `function pem_perf_event_start`.
• Atlas domain: Driver Families / drivers/perf.
• Implementation status: integration implementation candidate.

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.