drivers/platform/raspberrypi/vchiq-interface/vchiq_arm.c

File Facts

System

Linux kernel

Corpus path

drivers/platform/raspberrypi/vchiq-interface/vchiq_arm.c

Extension

.c

Size

37820 bytes

Lines

1477

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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• 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/kernel.h
• linux/module.h
• linux/sched/signal.h
• linux/types.h
• linux/errno.h
• linux/cdev.h
• linux/fs.h
• linux/device.h
• linux/device/bus.h
• linux/mm.h
• linux/pagemap.h
• linux/bug.h
• linux/completion.h
• linux/list.h
• linux/of.h
• linux/platform_device.h
• linux/compat.h
• linux/dma-mapping.h
• linux/rcupdate.h
• linux/delay.h
• linux/slab.h
• linux/interrupt.h
• linux/io.h
• linux/uaccess.h
• soc/bcm2835/raspberrypi-firmware.h
• linux/raspberrypi/vchiq_core.h
• linux/raspberrypi/vchiq_arm.h
• linux/raspberrypi/vchiq_bus.h
• linux/raspberrypi/vchiq_debugfs.h
• vchiq_ioctl.h

Detected Declarations

• struct vchiq_arm_state
• struct service_data_struct
• function vchiq_doorbell_irq
• function vchiq_call_connected_callbacks
• function vchiq_add_connected_callback
• function vchiq_platform_init
• function vchiq_platform_init_state
• function vchiq_platform_uninit
• function vchiq_dump_platform_state
• function vchiq_initialise
• function free_bulk_waiter
• function list_for_each_entry_safe
• function vchiq_shutdown
• function vchiq_is_connected
• function vchiq_connect
• function vchiq_add_service
• function vchiq_open_service
• function vchiq_bulk_transmit
• function vchiq_bulk_receive
• function vchiq_blocking_bulk_transfer
• function add_completion
• function service_single_message
• function service_callback
• function vchiq_dump_platform_instances
• function vchiq_dump_platform_service_state
• function vchiq_keepalive_vchiq_callback
• function vchiq_keepalive_thread_func
• function vchiq_use_internal
• function vchiq_release_internal
• function vchiq_on_remote_use
• function vchiq_on_remote_release
• function vchiq_use_service_internal
• function vchiq_release_service_internal
• function vchiq_instance_get_debugfs_node
• function vchiq_instance_get_use_count
• function vchiq_instance_get_pid
• function vchiq_instance_get_trace
• function vchiq_instance_set_trace
• function vchiq_use_service
• function vchiq_release_service
• function vchiq_dump_service_use_state
• function vchiq_check_service
• function vchiq_platform_conn_state_changed
• function vchiq_probe
• function vchiq_remove
• function vchiq_driver_init
• function vchiq_driver_exit
• module init vchiq_driver_init

Annotated Snippet

module_init(vchiq_driver_init);

static void __exit vchiq_driver_exit(void)
{
	bus_unregister(&vchiq_bus_type);
	platform_driver_unregister(&vchiq_driver);
}
module_exit(vchiq_driver_exit);

MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("Videocore VCHIQ driver");
MODULE_AUTHOR("Broadcom Corporation");

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/module.h`, `linux/sched/signal.h`, `linux/types.h`, `linux/errno.h`, `linux/cdev.h`, `linux/fs.h`, `linux/device.h`.
• Detected declarations: `struct vchiq_arm_state`, `struct service_data_struct`, `function vchiq_doorbell_irq`, `function vchiq_call_connected_callbacks`, `function vchiq_add_connected_callback`, `function vchiq_platform_init`, `function vchiq_platform_init_state`, `function vchiq_platform_uninit`, `function vchiq_dump_platform_state`, `function vchiq_initialise`.
• Atlas domain: Driver Families / drivers/platform.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

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.