drivers/ntb/hw/epf/ntb_hw_epf.c

File Facts

System

Linux kernel

Corpus path

drivers/ntb/hw/epf/ntb_hw_epf.c

Extension

.c

Size

17575 bytes

Lines

790

Domain

Driver Families

Bucket

drivers/ntb

Inferred role

Driver Families: operation-table or driver-model contract

Status

pattern 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.
• Defines an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• 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/delay.h
• linux/module.h
• linux/pci.h
• linux/slab.h
• linux/ntb.h

Detected Declarations

• struct ntb_epf_dev
• enum pci_barno
• enum epf_ntb_bar
• function ntb_epf_send_command
• function ntb_epf_mw_to_bar
• function ntb_epf_mw_count
• function ntb_epf_mw_get_align
• function ntb_epf_link_is_up
• function ntb_epf_spad_read
• function ntb_epf_spad_write
• function ntb_epf_peer_spad_read
• function ntb_epf_peer_spad_write
• function ntb_epf_link_enable
• function ntb_epf_link_disable
• function ntb_epf_vec_isr
• function ntb_epf_init_isr
• function ntb_epf_peer_mw_count
• function ntb_epf_spad_count
• function ntb_epf_db_valid_mask
• function ntb_epf_db_set_mask
• function ntb_epf_mw_set_trans
• function ntb_epf_mw_clear_trans
• function ntb_epf_peer_mw_get_addr
• function ntb_epf_peer_db_set
• function ntb_epf_db_read
• function ntb_epf_db_clear_mask
• function ntb_epf_db_clear
• function ntb_epf_init_struct
• function ntb_epf_init_dev
• function ntb_epf_init_pci
• function ntb_epf_deinit_pci
• function ntb_epf_cleanup_isr
• function ntb_epf_pci_probe
• function ntb_epf_pci_remove

Annotated Snippet

static struct pci_driver ntb_epf_pci_driver = {
	.name		= KBUILD_MODNAME,
	.id_table	= ntb_epf_pci_tbl,
	.probe		= ntb_epf_pci_probe,
	.remove		= ntb_epf_pci_remove,
};
module_pci_driver(ntb_epf_pci_driver);

MODULE_DESCRIPTION("PCI ENDPOINT NTB HOST DRIVER");
MODULE_AUTHOR("Kishon Vijay Abraham I <kishon@ti.com>");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/delay.h`, `linux/module.h`, `linux/pci.h`, `linux/slab.h`, `linux/ntb.h`.
• Detected declarations: `struct ntb_epf_dev`, `enum pci_barno`, `enum epf_ntb_bar`, `function ntb_epf_send_command`, `function ntb_epf_mw_to_bar`, `function ntb_epf_mw_count`, `function ntb_epf_mw_get_align`, `function ntb_epf_link_is_up`, `function ntb_epf_spad_read`, `function ntb_epf_spad_write`.
• Atlas domain: Driver Families / drivers/ntb.
• Implementation status: pattern 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.