drivers/perf/dwc_pcie_pmu.c

File Facts

System

Linux kernel

Corpus path

drivers/perf/dwc_pcie_pmu.c

Extension

.c

Size

25480 bytes

Lines

890

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/bitfield.h
• linux/bitops.h
• linux/cpuhotplug.h
• linux/cpumask.h
• linux/device.h
• linux/errno.h
• linux/kernel.h
• linux/list.h
• linux/pcie-dwc.h
• linux/perf_event.h
• linux/pci.h
• linux/platform_device.h
• linux/smp.h
• linux/sysfs.h
• linux/types.h

Detected Declarations

• struct dwc_pcie_pmu
• struct dwc_pcie_dev_info
• struct dwc_pcie_format_attr
• struct dwc_pcie_event_attr
• enum dwc_pcie_event_type
• function cpumask_show
• function dwc_pcie_event_show
• function dwc_pcie_pmu_lane_event_enable
• function dwc_pcie_pmu_time_based_event_enable
• function dwc_pcie_pmu_read_lane_event_counter
• function dwc_pcie_pmu_read_time_based_counter
• function dwc_pcie_pmu_event_update
• function dwc_pcie_pmu_validate_add_lane_event
• function dwc_pcie_pmu_validate_group
• function for_each_sibling_event
• function dwc_pcie_pmu_event_init
• function for_each_sibling_event
• function dwc_pcie_pmu_event_start
• function dwc_pcie_pmu_event_stop
• function dwc_pcie_pmu_event_add
• function dwc_pcie_pmu_event_del
• function dwc_pcie_pmu_remove_cpuhp_instance
• function dwc_pcie_unregister_pmu
• function dwc_pcie_des_cap
• function dwc_pcie_unregister_dev
• function dwc_pcie_register_dev
• function dwc_pcie_pmu_notifier
• function dwc_pcie_pmu_probe
• function dwc_pcie_pmu_online_cpu
• function dwc_pcie_pmu_offline_cpu
• function dwc_pcie_cleanup_devices
• function list_for_each_entry_safe
• function dwc_pcie_pmu_init
• function for_each_pci_dev
• function dwc_pcie_pmu_exit
• module init dwc_pcie_pmu_init

Annotated Snippet

module_init(dwc_pcie_pmu_init);
module_exit(dwc_pcie_pmu_exit);

MODULE_DESCRIPTION("PMU driver for DesignWare Cores PCI Express Controller");
MODULE_AUTHOR("Shuai Xue <xueshuai@linux.alibaba.com>");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/bitfield.h`, `linux/bitops.h`, `linux/cpuhotplug.h`, `linux/cpumask.h`, `linux/device.h`, `linux/errno.h`, `linux/kernel.h`, `linux/list.h`.
• Detected declarations: `struct dwc_pcie_pmu`, `struct dwc_pcie_dev_info`, `struct dwc_pcie_format_attr`, `struct dwc_pcie_event_attr`, `enum dwc_pcie_event_type`, `function cpumask_show`, `function dwc_pcie_event_show`, `function dwc_pcie_pmu_lane_event_enable`, `function dwc_pcie_pmu_time_based_event_enable`, `function dwc_pcie_pmu_read_lane_event_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.