drivers/perf/nvidia_t410_cmem_latency_pmu.c

File Facts

System

Linux kernel

Corpus path

drivers/perf/nvidia_t410_cmem_latency_pmu.c

Extension

.c

Size

19989 bytes

Lines

737

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/bitops.h
• linux/cpumask.h
• linux/device.h
• linux/interrupt.h
• linux/io.h
• linux/module.h
• linux/perf_event.h
• linux/platform_device.h

Detected Declarations

• struct cmem_lat_pmu_hw_events
• struct cmem_lat_pmu
• function get_event_type
• function cmem_lat_pmu_get_event_idx
• function cmem_lat_pmu_validate_event
• function cmem_lat_pmu_validate_group
• function for_each_sibling_event
• function cmem_lat_pmu_event_init
• function cmem_lat_pmu_read_status
• function cmem_lat_pmu_read_cycle_counter
• function cmem_lat_pmu_read_req_counter
• function cmem_lat_pmu_read_aor_counter
• function cmem_lat_pmu_event_update
• function cmem_lat_pmu_start
• function cmem_lat_pmu_stop
• function cmem_lat_pmu_add
• function cmem_lat_pmu_del
• function cmem_lat_pmu_read
• function cmem_lat_pmu_cg_ctrl
• function cmem_lat_pmu_ctrl
• function cmem_lat_pmu_enable
• function cmem_lat_pmu_disable
• function cmem_lat_pmu_identifier_show
• function cmem_lat_pmu_sysfs_event_show
• function cmem_lat_pmu_cpumask_show
• function cmem_lat_pmu_cpu_online
• function cmem_lat_pmu_cpu_teardown
• function cmem_lat_pmu_get_cpus
• function for_each_possible_cpu
• function cmem_lat_pmu_probe
• function cmem_lat_pmu_device_remove
• function cmem_lat_pmu_init
• function cmem_lat_pmu_exit
• module init cmem_lat_pmu_init

Annotated Snippet

module_init(cmem_lat_pmu_init);
module_exit(cmem_lat_pmu_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("NVIDIA Tegra410 CPU Memory Latency PMU driver");
MODULE_AUTHOR("Besar Wicaksono <bwicaksono@nvidia.com>");

Annotation

• Immediate include surface: `linux/acpi.h`, `linux/bitops.h`, `linux/cpumask.h`, `linux/device.h`, `linux/interrupt.h`, `linux/io.h`, `linux/module.h`, `linux/perf_event.h`.
• Detected declarations: `struct cmem_lat_pmu_hw_events`, `struct cmem_lat_pmu`, `function get_event_type`, `function cmem_lat_pmu_get_event_idx`, `function cmem_lat_pmu_validate_event`, `function cmem_lat_pmu_validate_group`, `function for_each_sibling_event`, `function cmem_lat_pmu_event_init`, `function cmem_lat_pmu_read_status`, `function cmem_lat_pmu_read_cycle_counter`.
• 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.