drivers/platform/x86/amd/hfi/hfi.c

File Facts

System

Linux kernel

Corpus path

drivers/platform/x86/amd/hfi/hfi.c

Extension

.c

Size

13757 bytes

Lines

547

Domain

Driver Families

Bucket

drivers/platform

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/cpu.h
• linux/debugfs.h
• linux/gfp.h
• linux/init.h
• linux/io.h
• linux/kernel.h
• linux/module.h
• linux/mailbox_client.h
• linux/mutex.h
• linux/percpu-defs.h
• linux/platform_device.h
• linux/smp.h
• linux/topology.h
• linux/workqueue.h
• asm/cpu_device_id.h
• acpi/pcc.h
• acpi/cppc_acpi.h

Detected Declarations

• struct amd_shmem_info
• struct amd_hfi_data
• struct amd_hfi_classes
• struct amd_hfi_cpuinfo
• function amd_hfi_sched_itmt_work
• function find_cpu_index_by_apicid
• function for_each_possible_cpu
• function amd_hfi_fill_metadata
• function amd_hfi_alloc_class_data
• function for_each_possible_cpu
• function amd_hfi_remove
• function amd_set_hfi_ipcc_score
• function amd_hfi_set_state
• function amd_hfi_online
• function amd_hfi_offline
• function update_hfi_ipcc_scores
• function for_each_possible_cpu
• function amd_hfi_metadata_parser
• function class_capabilities_show
• function amd_hfi_pm_resume
• function for_each_online_cpu
• function amd_hfi_pm_suspend
• function for_each_online_cpu
• function amd_hfi_probe
• function amd_hfi_init
• function amd_hfi_exit
• module init amd_hfi_init

Annotated Snippet

module_init(amd_hfi_init);
module_exit(amd_hfi_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("AMD Hardware Feedback Interface Driver");

Annotation

• Immediate include surface: `linux/acpi.h`, `linux/cpu.h`, `linux/debugfs.h`, `linux/gfp.h`, `linux/init.h`, `linux/io.h`, `linux/kernel.h`, `linux/module.h`.
• Detected declarations: `struct amd_shmem_info`, `struct amd_hfi_data`, `struct amd_hfi_classes`, `struct amd_hfi_cpuinfo`, `function amd_hfi_sched_itmt_work`, `function find_cpu_index_by_apicid`, `function for_each_possible_cpu`, `function amd_hfi_fill_metadata`, `function amd_hfi_alloc_class_data`, `function for_each_possible_cpu`.
• Atlas domain: Driver Families / drivers/platform.
• 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.