drivers/infiniband/hw/mlx5/data_direct.c

File Facts

System

Linux kernel

Corpus path

drivers/infiniband/hw/mlx5/data_direct.c

Extension

.c

Size

5486 bytes

Lines

228

Domain

Driver Families

Bucket

drivers/infiniband

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.
• 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

• mlx5_ib.h
• data_direct.h

Detected Declarations

• struct mlx5_data_direct_registration
• function mlx5_data_direct_vpd_get_vuid
• function mlx5_data_direct_shutdown
• function mlx5_data_direct_set_dma_caps
• function mlx5_data_direct_ib_reg
• function mlx5_data_direct_ib_unreg
• function mlx5_data_direct_dev_reg
• function mlx5_data_direct_dev_unreg
• function mlx5_data_direct_probe
• function mlx5_data_direct_remove
• function mlx5_data_direct_driver_register
• function mlx5_data_direct_driver_unregister

Annotated Snippet

static struct pci_driver mlx5_data_direct_driver = {
	.name = KBUILD_MODNAME,
	.id_table = mlx5_data_direct_pci_table,
	.probe = mlx5_data_direct_probe,
	.remove = mlx5_data_direct_remove,
	.shutdown = mlx5_data_direct_shutdown,
};

int mlx5_data_direct_driver_register(void)
{
	return pci_register_driver(&mlx5_data_direct_driver);
}

void mlx5_data_direct_driver_unregister(void)
{
	pci_unregister_driver(&mlx5_data_direct_driver);
}

Annotation

• Immediate include surface: `mlx5_ib.h`, `data_direct.h`.
• Detected declarations: `struct mlx5_data_direct_registration`, `function mlx5_data_direct_vpd_get_vuid`, `function mlx5_data_direct_shutdown`, `function mlx5_data_direct_set_dma_caps`, `function mlx5_data_direct_ib_reg`, `function mlx5_data_direct_ib_unreg`, `function mlx5_data_direct_dev_reg`, `function mlx5_data_direct_dev_unreg`, `function mlx5_data_direct_probe`, `function mlx5_data_direct_remove`.
• Atlas domain: Driver Families / drivers/infiniband.
• Implementation status: pattern 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.