drivers/hwtracing/coresight/coresight-catu.c

File Facts

System

Linux kernel

Corpus path

drivers/hwtracing/coresight/coresight-catu.c

Extension

.c

Size

19983 bytes

Lines

726

Domain

Driver Families

Bucket

drivers/hwtracing

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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• 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/amba/bus.h
• linux/device.h
• linux/dma-mapping.h
• linux/io.h
• linux/kernel.h
• linux/platform_device.h
• linux/slab.h
• coresight-catu.h
• coresight-priv.h
• coresight-tmc.h

Detected Declarations

• struct catu_etr_buf
• function catu_dump_table
• function catu_dump_table
• function catu_set_table
• function table
• function catu_init_sg_table
• function catu_free_etr_buf
• function catu_get_data_etr_buf
• function catu_sync_etr_buf
• function catu_alloc_etr_buf
• function catu_wait_for_ready
• function catu_enable_hw
• function catu_enable
• function catu_disable_hw
• function catu_disable
• function __catu_probe
• function catu_probe
• function __catu_remove
• function catu_remove
• function catu_platform_probe
• function catu_platform_remove
• function catu_runtime_suspend
• function catu_runtime_resume
• function catu_init
• function catu_exit
• module init catu_init

Annotated Snippet

module_init(catu_init);
module_exit(catu_exit);

MODULE_AUTHOR("Suzuki K Poulose <suzuki.poulose@arm.com>");
MODULE_DESCRIPTION("Arm CoreSight Address Translation Unit (CATU) Driver");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/acpi.h`, `linux/amba/bus.h`, `linux/device.h`, `linux/dma-mapping.h`, `linux/io.h`, `linux/kernel.h`, `linux/platform_device.h`, `linux/slab.h`.
• Detected declarations: `struct catu_etr_buf`, `function catu_dump_table`, `function catu_dump_table`, `function catu_set_table`, `function table`, `function catu_init_sg_table`, `function catu_free_etr_buf`, `function catu_get_data_etr_buf`, `function catu_sync_etr_buf`, `function catu_alloc_etr_buf`.
• Atlas domain: Driver Families / drivers/hwtracing.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.