drivers/cxl/acpi.c

File Facts

System

Linux kernel

Corpus path

drivers/cxl/acpi.c

Extension

.c

Size

25708 bytes

Lines

1016

Domain

Driver Families

Bucket

drivers/cxl

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/platform_device.h
• linux/module.h
• linux/device.h
• linux/kernel.h
• linux/acpi.h
• linux/pci.h
• linux/node.h
• asm/div64.h
• cxlpci.h
• cxl.h

Detected Declarations

• struct cxl_cxims_context
• struct cxl_cfmws_context
• struct cxl_chbs_context
• function cxl_do_xormap_calc
• function cxl_apply_xor_maps
• function cxl_parse_cxims
• function cfmws_to_decoder_flags
• function cxl_acpi_cfmws_verify
• function cxl_acpi_evaluate_qtg_dsm
• function cxl_acpi_qos_class
• function del_cxl_resource
• function add_or_reset_cxl_resource
• function cxl_setup_extended_linear_cache
• function cxl_parse_cfmws
• function cxl_get_chbs_iter
• function cxl_get_chbs
• function get_genport_coordinates
• function add_host_bridge_dport
• function add_host_bridge_uport
• function dport
• function add_root_nvdimm_bridge
• function cxl_acpi_lock_reset_class
• function cxl_set_public_resource
• function remove_cxl_resources
• function add_cxl_resources
• function pair_cxl_resource
• function cxl_acpi_probe
• function cxl_acpi_init
• function cxl_acpi_exit

Annotated Snippet

* subsys_initcall(efisubsys_init), which must run first.
 */
subsys_initcall_sync(cxl_acpi_init);

/*
 * Arrange for host-bridge ports to be active synchronous with
 * cxl_acpi_probe() exit.
 */
MODULE_SOFTDEP("pre: cxl_port");

module_exit(cxl_acpi_exit);
MODULE_DESCRIPTION("CXL ACPI: Platform Support");
MODULE_LICENSE("GPL v2");
MODULE_IMPORT_NS("CXL");
MODULE_IMPORT_NS("ACPI");

Annotation

• Immediate include surface: `linux/platform_device.h`, `linux/module.h`, `linux/device.h`, `linux/kernel.h`, `linux/acpi.h`, `linux/pci.h`, `linux/node.h`, `asm/div64.h`.
• Detected declarations: `struct cxl_cxims_context`, `struct cxl_cfmws_context`, `struct cxl_chbs_context`, `function cxl_do_xormap_calc`, `function cxl_apply_xor_maps`, `function cxl_parse_cxims`, `function cfmws_to_decoder_flags`, `function cxl_acpi_cfmws_verify`, `function cxl_acpi_evaluate_qtg_dsm`, `function cxl_acpi_qos_class`.
• Atlas domain: Driver Families / drivers/cxl.
• 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.