drivers/net/ethernet/intel/libeth/xdp.c

File Facts

System

Linux kernel

Corpus path

drivers/net/ethernet/intel/libeth/xdp.c

Extension

.c

Size

12440 bytes

Lines

452

Domain

Driver Families

Bucket

drivers/net

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/export.h
• net/libeth/xdp.h
• priv.h

Detected Declarations

• function __libeth_xdpsq_get
• function __libeth_xdpsq_put
• function __acquires
• function __releases
• function libeth_xdpsq_init_timer
• function libeth_xdp_tx_return_one
• function libeth_xdp_tx_return_bulk
• function libeth_trace_xdp_exception
• function __libeth_xdp_tx_flush_bulk
• function libeth_xdp_xmit_return_bulk
• function libeth_xdp_init_buff
• function libeth_xdp_save_buff
• function __libeth_xdp_return_stash
• function libeth_xdp_return_buff
• function libeth_xdp_process_buff
• function __libeth_xdp_run_prog
• function libeth_xdp_put_netmem_bulk
• function xdp_return_frame_bulk
• function refill
• function __libeth_xdp_set_features
• function libeth_xdp_set_redirect
• function libeth_xdp_module_init
• function libeth_xdp_module_exit
• module init libeth_xdp_module_init
• export libeth_xdpsq_share
• export __libeth_xdpsq_get
• export __libeth_xdpsq_put
• export __libeth_xdpsq_lock
• export __libeth_xdpsq_unlock
• export libeth_xdpsq_init_timer
• export libeth_xdp_tx_exception
• export libeth_xdp_xmit_return_bulk
• export libeth_xdp_load_stash
• export libeth_xdp_save_stash
• export __libeth_xdp_return_stash
• export libeth_xdp_return_buff_slow
• export libeth_xdp_buff_add_frag
• export libeth_xdp_prog_exception
• export libeth_xdp_return_buff_bulk
• export libeth_xdp_queue_threshold
• export __libeth_xdp_set_features
• export libeth_xdp_set_redirect

Annotated Snippet

module_init(libeth_xdp_module_init);

static void __exit libeth_xdp_module_exit(void)
{
	libeth_detach_xdp();
}
module_exit(libeth_xdp_module_exit);

MODULE_DESCRIPTION("Common Ethernet library - XDP infra");
MODULE_IMPORT_NS("LIBETH");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/export.h`, `net/libeth/xdp.h`, `priv.h`.
• Detected declarations: `function __libeth_xdpsq_get`, `function __libeth_xdpsq_put`, `function __acquires`, `function __releases`, `function libeth_xdpsq_init_timer`, `function libeth_xdp_tx_return_one`, `function libeth_xdp_tx_return_bulk`, `function libeth_trace_xdp_exception`, `function __libeth_xdp_tx_flush_bulk`, `function libeth_xdp_xmit_return_bulk`.
• Atlas domain: Driver Families / drivers/net.
• 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.