drivers/vfio/pci/ism/main.c

File Facts

System

Linux kernel

Corpus path

drivers/vfio/pci/ism/main.c

Extension

.c

Size

11126 bytes

Lines

409

Domain

Driver Families

Bucket

drivers/vfio

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.
• Touches user memory; correctness depends on fault-safe copying and privilege boundary handling.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/slab.h
• ../vfio_pci_priv.h

Detected Declarations

• struct ism_vfio_pci_core_device
• function ism_vfio_pci_open_device
• function ism_vfio_pci_do_io_r
• function ism_vfio_pci_do_io_w
• function ism_vfio_pci_bar_rw
• function ism_vfio_pci_config_rw
• function ism_vfio_pci_rw
• function ism_vfio_pci_read
• function ism_vfio_pci_write
• function ism_vfio_pci_ioctl_get_region_info
• function ism_vfio_pci_init_dev
• function kmem_cache_create
• function ism_vfio_pci_release_dev
• function ism_vfio_pci_probe
• function ism_vfio_pci_remove

Annotated Snippet

static struct pci_driver ism_vfio_pci_driver = {
	.name = KBUILD_MODNAME,
	.id_table = ism_device_table,
	.probe = ism_vfio_pci_probe,
	.remove = ism_vfio_pci_remove,
	.err_handler = &vfio_pci_core_err_handlers,
	.driver_managed_dma = true,
};

module_pci_driver(ism_vfio_pci_driver);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("vfio-pci variant driver for the IBM Internal Shared Memory (ISM) device");
MODULE_AUTHOR("IBM Corporation");

Annotation

• Immediate include surface: `linux/slab.h`, `../vfio_pci_priv.h`.
• Detected declarations: `struct ism_vfio_pci_core_device`, `function ism_vfio_pci_open_device`, `function ism_vfio_pci_do_io_r`, `function ism_vfio_pci_do_io_w`, `function ism_vfio_pci_bar_rw`, `function ism_vfio_pci_config_rw`, `function ism_vfio_pci_rw`, `function ism_vfio_pci_read`, `function ism_vfio_pci_write`, `function ism_vfio_pci_ioctl_get_region_info`.
• Atlas domain: Driver Families / drivers/vfio.
• Implementation status: pattern implementation candidate.
• This snippet crosses the user/kernel memory boundary; validate fault handling and access checks before translating the pattern.

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.