drivers/perf/marvell_cn10k_ddr_pmu.c

File Facts

System

Linux kernel

Corpus path

drivers/perf/marvell_cn10k_ddr_pmu.c

Extension

.c

Size

36036 bytes

Lines

1156

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.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• 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/io.h
• linux/module.h
• linux/of.h
• linux/perf_event.h
• linux/hrtimer.h
• linux/acpi.h
• linux/platform_device.h

Detected Declarations

• struct cn10k_ddr_pmu
• struct ddr_pmu_ops
• struct ddr_pmu_platform_data
• function cn10k_ddr_pmu_event_show
• function cn10k_ddr_perf_cpumask_show
• function cn10k_ddr_pmu_timer_period
• function ddr_perf_get_event_bitmap
• function cn10k_ddr_perf_alloc_counter
• function cn10k_ddr_perf_free_counter
• function cn10k_ddr_perf_event_init
• function cn10k_ddr_perf_counter_start
• function cn10k_ddr_perf_counter_stop
• function cn10k_ddr_perf_counter_enable
• function cn10k_ddr_perf_read_counter
• function cn10k_ddr_perf_event_update
• function cn10k_ddr_perf_event_start
• function cn10k_ddr_perf_event_add
• function cn10k_ddr_perf_event_stop
• function cn10k_ddr_perf_event_del
• function cn10k_ddr_perf_pmu_enable
• function cn10k_ddr_perf_pmu_disable
• function cn10k_ddr_perf_event_update_all
• function ddr_pmu_enable_read_freerun
• function ddr_pmu_enable_write_freerun
• function ddr_pmu_read_clear_freerun
• function ddr_pmu_write_clear_freerun
• function ddr_pmu_overflow_hander
• function ddr_pmu_ody_enable_read_freerun
• function ddr_pmu_ody_enable_write_freerun
• function ddr_pmu_ody_read_clear_freerun
• function ddr_pmu_ody_write_clear_freerun
• function ddr_pmu_ody_overflow_hander
• function cn10k_ddr_pmu_overflow_handler
• function cn10k_ddr_pmu_timer_handler
• function cn10k_ddr_pmu_offline_cpu
• function cn10k_ddr_perf_probe
• function cn10k_ddr_perf_remove
• function cn10k_ddr_pmu_init
• function cn10k_ddr_pmu_exit
• module init cn10k_ddr_pmu_init

Annotated Snippet

module_init(cn10k_ddr_pmu_init);
module_exit(cn10k_ddr_pmu_exit);

MODULE_AUTHOR("Bharat Bhushan <bbhushan2@marvell.com>");
MODULE_DESCRIPTION("Marvell CN10K DRAM Subsystem (DSS) Performance Monitor Driver");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/init.h`, `linux/io.h`, `linux/module.h`, `linux/of.h`, `linux/perf_event.h`, `linux/hrtimer.h`, `linux/acpi.h`, `linux/platform_device.h`.
• Detected declarations: `struct cn10k_ddr_pmu`, `struct ddr_pmu_ops`, `struct ddr_pmu_platform_data`, `function cn10k_ddr_pmu_event_show`, `function cn10k_ddr_perf_cpumask_show`, `function cn10k_ddr_pmu_timer_period`, `function ddr_perf_get_event_bitmap`, `function cn10k_ddr_perf_alloc_counter`, `function cn10k_ddr_perf_free_counter`, `function cn10k_ddr_perf_event_init`.
• Atlas domain: Driver Families / drivers/perf.
• Implementation status: integration implementation candidate.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

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.