drivers/usb/gadget/legacy/tcm_usb_gadget.c

File Facts

System

Linux kernel

Corpus path

drivers/usb/gadget/legacy/tcm_usb_gadget.c

Extension

.c

Size

4419 bytes

Lines

174

Domain

Driver Families

Bucket

drivers/usb

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/kernel.h
• linux/module.h
• linux/types.h
• linux/string.h
• linux/configfs.h
• linux/ctype.h
• linux/usb/ch9.h
• linux/usb/composite.h
• linux/usb/gadget.h
• linux/usb/storage.h
• scsi/scsi_tcq.h
• target/target_core_base.h
• target/target_core_fabric.h
• linux/unaligned.h
• u_tcm.h

Detected Declarations

• function guas_unbind
• function tcm_do_config
• function usb_target_bind
• function usbg_attach
• function usbg_detach
• function usb_target_gadget_init
• function usb_target_gadget_exit
• module init usb_target_gadget_init

Annotated Snippet

module_init(usb_target_gadget_init);

static void __exit usb_target_gadget_exit(void)
{
	if (!IS_ERR_OR_NULL(fi_tcm))
		usb_put_function_instance(fi_tcm);

}
module_exit(usb_target_gadget_exit);

MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");
MODULE_DESCRIPTION("usb-gadget fabric");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/module.h`, `linux/types.h`, `linux/string.h`, `linux/configfs.h`, `linux/ctype.h`, `linux/usb/ch9.h`, `linux/usb/composite.h`.
• Detected declarations: `function guas_unbind`, `function tcm_do_config`, `function usb_target_bind`, `function usbg_attach`, `function usbg_detach`, `function usb_target_gadget_init`, `function usb_target_gadget_exit`, `module init usb_target_gadget_init`.
• Atlas domain: Driver Families / drivers/usb.
• 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.