drivers/ntb/hw/mscc/ntb_hw_switchtec.c

File Facts

System

Linux kernel

Corpus path

drivers/ntb/hw/mscc/ntb_hw_switchtec.c

Extension

.c

Size

39369 bytes

Lines

1587

Domain

Driver Families

Bucket

drivers/ntb

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/interrupt.h
• linux/io-64-nonatomic-lo-hi.h
• linux/delay.h
• linux/kthread.h
• linux/module.h
• linux/ntb.h
• linux/pci.h
• linux/switchtec.h

Detected Declarations

• struct shared_mw
• struct switchtec_ntb
• enum switchtec_msg
• function switchtec_ntb_part_op
• function switchtec_ntb_send_msg
• function switchtec_ntb_mw_count
• function lut_index
• function peer_lut_index
• function switchtec_ntb_mw_get_align
• function switchtec_ntb_mw_clr_direct
• function switchtec_ntb_mw_clr_lut
• function switchtec_ntb_mw_set_direct
• function switchtec_ntb_mw_set_lut
• function switchtec_ntb_mw_set_trans
• function switchtec_ntb_peer_mw_count
• function switchtec_ntb_direct_get_addr
• function switchtec_ntb_lut_get_addr
• function switchtec_ntb_peer_mw_get_addr
• function switchtec_ntb_part_link_speed
• function switchtec_ntb_set_link_speed
• function crosslink_is_enabled
• function crosslink_init_dbmsgs
• function switchtec_ntb_link_status_update
• function check_link_status_work
• function switchtec_ntb_check_link
• function switchtec_ntb_link_notification
• function switchtec_ntb_link_is_up
• function switchtec_ntb_link_enable
• function switchtec_ntb_link_disable
• function switchtec_ntb_db_valid_mask
• function switchtec_ntb_db_vector_count
• function switchtec_ntb_db_vector_mask
• function switchtec_ntb_db_read
• function switchtec_ntb_db_clear
• function switchtec_ntb_db_set_mask
• function switchtec_ntb_db_clear_mask
• function switchtec_ntb_db_read_mask
• function switchtec_ntb_peer_db_addr
• function switchtec_ntb_peer_db_set
• function switchtec_ntb_spad_count
• function switchtec_ntb_spad_read
• function switchtec_ntb_spad_write
• function switchtec_ntb_peer_spad_read
• function switchtec_ntb_peer_spad_write
• function switchtec_ntb_peer_spad_addr
• function switchtec_ntb_init_sndev
• function config_rsvd_lut_win
• function config_req_id_table

Annotated Snippet

module_init(switchtec_ntb_init);

static void __exit switchtec_ntb_exit(void)
{
	class_interface_unregister(&switchtec_interface);
}
module_exit(switchtec_ntb_exit);

Annotation

• Immediate include surface: `linux/interrupt.h`, `linux/io-64-nonatomic-lo-hi.h`, `linux/delay.h`, `linux/kthread.h`, `linux/module.h`, `linux/ntb.h`, `linux/pci.h`, `linux/switchtec.h`.
• Detected declarations: `struct shared_mw`, `struct switchtec_ntb`, `enum switchtec_msg`, `function switchtec_ntb_part_op`, `function switchtec_ntb_send_msg`, `function switchtec_ntb_mw_count`, `function lut_index`, `function peer_lut_index`, `function switchtec_ntb_mw_get_align`, `function switchtec_ntb_mw_clr_direct`.
• Atlas domain: Driver Families / drivers/ntb.
• 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.