drivers/cxl/pmem.c

File Facts

System

Linux kernel

Corpus path

drivers/cxl/pmem.c

Extension

.c

Size

14517 bytes

Lines

563

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/libnvdimm.h
• linux/unaligned.h
• linux/device.h
• linux/module.h
• linux/ndctl.h
• linux/async.h
• linux/slab.h
• linux/nd.h
• cxlmem.h
• cxl.h

Detected Declarations

• struct cxl_pmem_region_info
• function devm_cxl_add_nvdimm_bridge
• function clear_exclusive
• function unregister_nvdimm
• function provider_show
• function id_show
• function dirty_shutdown_show
• function cxl_dimm_visible
• function cxl_nvdimm_arm_dirty_shutdown_tracking
• function cxl_nvdimm_probe
• function cxl_pmem_get_config_size
• function cxl_pmem_get_config_data
• function cxl_pmem_set_config_data
• function cxl_pmem_nvdimm_ctl
• function cxl_pmem_ctl
• function detach_nvdimm
• function scoped_guard
• function unregister_nvdimm_bus
• function cxl_nvdimm_bridge_probe
• function unregister_nvdimm_region
• function cxlr_pmem_remove_resource
• function cxl_pmem_region_probe
• function cxl_pmem_init
• function cxl_pmem_exit
• module init cxl_pmem_init

Annotated Snippet

subsys_initcall(cxl_pmem_init);
module_exit(cxl_pmem_exit);
MODULE_IMPORT_NS("CXL");
MODULE_ALIAS_CXL(CXL_DEVICE_NVDIMM_BRIDGE);
MODULE_ALIAS_CXL(CXL_DEVICE_NVDIMM);
MODULE_ALIAS_CXL(CXL_DEVICE_PMEM_REGION);

Annotation

• Immediate include surface: `linux/libnvdimm.h`, `linux/unaligned.h`, `linux/device.h`, `linux/module.h`, `linux/ndctl.h`, `linux/async.h`, `linux/slab.h`, `linux/nd.h`.
• Detected declarations: `struct cxl_pmem_region_info`, `function devm_cxl_add_nvdimm_bridge`, `function clear_exclusive`, `function unregister_nvdimm`, `function provider_show`, `function id_show`, `function dirty_shutdown_show`, `function cxl_dimm_visible`, `function cxl_nvdimm_arm_dirty_shutdown_tracking`, `function cxl_nvdimm_probe`.
• 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.