drivers/net/can/sja1000/ems_pci.c

File Facts

System

Linux kernel

Corpus path

drivers/net/can/sja1000/ems_pci.c

Extension

.c

Size

12109 bytes

Lines

432

Domain

Driver Families

Bucket

drivers/net

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.
• 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/kernel.h
• linux/module.h
• linux/interrupt.h
• linux/netdevice.h
• linux/delay.h
• linux/slab.h
• linux/pci.h
• linux/can/dev.h
• linux/io.h
• sja1000.h

Detected Declarations

• struct ems_pci_card
• function ems_pci_v1_readb
• function ems_pci_v1_read_reg
• function ems_pci_v1_write_reg
• function ems_pci_v1_post_irq
• function ems_pci_v2_read_reg
• function ems_pci_v2_write_reg
• function ems_pci_v2_post_irq
• function ems_pci_v3_read_reg
• function ems_pci_v3_write_reg
• function ems_pci_v3_post_irq
• function ems_pci_check_chan
• function ems_pci_del_card
• function ems_pci_card_reset
• function ems_pci_add_card

Annotated Snippet

static struct pci_driver ems_pci_driver = {
	.name = DRV_NAME,
	.id_table = ems_pci_tbl,
	.probe = ems_pci_add_card,
	.remove = ems_pci_del_card,
};

module_pci_driver(ems_pci_driver);

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/module.h`, `linux/interrupt.h`, `linux/netdevice.h`, `linux/delay.h`, `linux/slab.h`, `linux/pci.h`, `linux/can/dev.h`.
• Detected declarations: `struct ems_pci_card`, `function ems_pci_v1_readb`, `function ems_pci_v1_read_reg`, `function ems_pci_v1_write_reg`, `function ems_pci_v1_post_irq`, `function ems_pci_v2_read_reg`, `function ems_pci_v2_write_reg`, `function ems_pci_v2_post_irq`, `function ems_pci_v3_read_reg`, `function ems_pci_v3_write_reg`.
• Atlas domain: Driver Families / drivers/net.
• Implementation status: pattern implementation candidate.

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.