drivers/usb/gadget/function/f_sourcesink.c

File Facts

System

Linux kernel

Corpus path

drivers/usb/gadget/function/f_sourcesink.c

Extension

.c

Size

32735 bytes

Lines

1341

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.
• 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/slab.h
• linux/kernel.h
• linux/device.h
• linux/module.h
• linux/usb/composite.h
• linux/usb/func_utils.h
• linux/err.h
• g_zero.h

Detected Declarations

• struct f_sourcesink
• function disable_ep
• function disable_endpoints
• function sourcesink_bind
• function sourcesink_free_func
• function check_read_data
• function reinit_write_data
• function source_sink_complete
• function source_sink_start_ep
• function disable_source_sink
• function enable_source_sink
• function sourcesink_set_alt
• function sourcesink_get_alt
• function sourcesink_disable
• function sourcesink_setup
• function ss_attr_release
• function f_ss_opts_pattern_show
• function f_ss_opts_pattern_store
• function f_ss_opts_isoc_interval_show
• function f_ss_opts_isoc_interval_store
• function f_ss_opts_isoc_maxpacket_show
• function f_ss_opts_isoc_maxpacket_store
• function f_ss_opts_isoc_mult_show
• function f_ss_opts_isoc_mult_store
• function f_ss_opts_isoc_maxburst_show
• function f_ss_opts_isoc_maxburst_store
• function f_ss_opts_bulk_maxburst_show
• function f_ss_opts_bulk_maxburst_store
• function f_ss_opts_bulk_buflen_show
• function f_ss_opts_bulk_buflen_store
• function f_ss_opts_bulk_qlen_show
• function f_ss_opts_bulk_qlen_store
• function f_ss_opts_iso_qlen_show
• function f_ss_opts_iso_qlen_store
• function source_sink_free_instance
• function sslb_modinit
• function sslb_modexit
• module init sslb_modinit

Annotated Snippet

module_init(sslb_modinit);
module_exit(sslb_modexit);

MODULE_DESCRIPTION("USB peripheral source/sink configuration driver");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/slab.h`, `linux/kernel.h`, `linux/device.h`, `linux/module.h`, `linux/usb/composite.h`, `linux/usb/func_utils.h`, `linux/err.h`, `g_zero.h`.
• Detected declarations: `struct f_sourcesink`, `function disable_ep`, `function disable_endpoints`, `function sourcesink_bind`, `function sourcesink_free_func`, `function check_read_data`, `function reinit_write_data`, `function source_sink_complete`, `function source_sink_start_ep`, `function disable_source_sink`.
• 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.