drivers/hwtracing/coresight/coresight-stm.c

File Facts

System

Linux kernel

Corpus path

drivers/hwtracing/coresight/coresight-stm.c

Extension

.c

Size

26278 bytes

Lines

1066

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

• asm/local.h
• linux/acpi.h
• linux/amba/bus.h
• linux/bitmap.h
• linux/clk.h
• linux/coresight.h
• linux/coresight-stm.h
• linux/err.h
• linux/kernel.h
• linux/moduleparam.h
• linux/of_address.h
• linux/perf_event.h
• linux/pm_runtime.h
• linux/stm.h
• linux/platform_device.h
• coresight-priv.h
• coresight-trace-id.h

Detected Declarations

• struct channel_space
• struct stm_drvdata
• enum stm_pkt_type
• function stm_hwevent_enable_hw
• function stm_port_enable_hw
• function stm_enable_hw
• function stm_enable
• function stm_hwevent_disable_hw
• function stm_port_disable_hw
• function stm_disable_hw
• function stm_disable
• function stm_trace_id
• function stm_addr_unaligned
• function stm_send
• function stm_generic_link
• function stm_generic_unlink
• function stm_mmio_addr
• function stm_generic_set_options
• function stm_generic_packet
• function hwevent_enable_show
• function hwevent_enable_store
• function hwevent_select_show
• function hwevent_select_store
• function port_select_show
• function port_select_store
• function port_enable_show
• function port_enable_store
• function traceid_show
• function of_stm_get_stimulus_area
• function of_stm_get_stimulus_area
• function acpi_stm_get_stimulus_area
• function acpi_stm_get_stimulus_area
• function stm_get_stimulus_area
• function stm_fundamental_data_size
• function stm_num_stimulus_port
• function stm_init_default_data
• function stm_init_generic_data
• function __stm_probe
• function stm_probe
• function __stm_remove
• function stm_remove
• function stm_runtime_suspend
• function stm_runtime_resume
• function stm_platform_probe
• function stm_platform_remove
• function stm_init
• function stm_exit
• module init stm_init

Annotated Snippet

module_init(stm_init);
module_exit(stm_exit);

MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
MODULE_DESCRIPTION("Arm CoreSight System Trace Macrocell driver");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `asm/local.h`, `linux/acpi.h`, `linux/amba/bus.h`, `linux/bitmap.h`, `linux/clk.h`, `linux/coresight.h`, `linux/coresight-stm.h`, `linux/err.h`.
• Detected declarations: `struct channel_space`, `struct stm_drvdata`, `enum stm_pkt_type`, `function stm_hwevent_enable_hw`, `function stm_port_enable_hw`, `function stm_enable_hw`, `function stm_enable`, `function stm_hwevent_disable_hw`, `function stm_port_disable_hw`, `function stm_disable_hw`.
• 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.