drivers/virtio/virtio_pci_common.c

File Facts

System

Linux kernel

Corpus path

drivers/virtio/virtio_pci_common.c

Extension

.c

Size

22189 bytes

Lines

865

Domain

Driver Families

Bucket

drivers/virtio

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

• virtio_pci_common.h

Detected Declarations

• enum vp_vq_vector_policy
• function vp_is_avq
• function vp_synchronize_vectors
• function vp_notify
• function vp_vring_slow_path_interrupt
• function vp_config_changed
• function vp_vring_interrupt
• function vp_interrupt
• function vp_request_msix_vectors
• function vp_is_slow_path_vector
• function void
• function vp_del_vq
• function vp_del_vqs
• function list_for_each_entry_safe
• function vp_find_one_vq_msix
• function vp_find_vqs_msix
• function vp_find_vqs_intx
• function vp_find_vqs
• function vp_set_vq_affinity
• function virtio_pci_freeze
• function virtio_pci_restore
• function vp_supports_pm_no_reset
• function virtio_pci_suspend
• function virtio_pci_resume
• function virtio_pci_release_dev
• function virtio_pci_probe
• function virtio_pci_remove
• function virtio_pci_sriov_configure
• function virtio_pci_reset_prepare
• function virtio_pci_reset_done

Annotated Snippet

static struct pci_driver virtio_pci_driver = {
	.name		= "virtio-pci",
	.id_table	= virtio_pci_id_table,
	.probe		= virtio_pci_probe,
	.remove		= virtio_pci_remove,
#ifdef CONFIG_PM_SLEEP
	.driver.pm	= &virtio_pci_pm_ops,
#endif
	.sriov_configure = virtio_pci_sriov_configure,
	.err_handler	= &virtio_pci_err_handler,
};

struct virtio_device *virtio_pci_vf_get_pf_dev(struct pci_dev *pdev)
{
	struct virtio_pci_device *pf_vp_dev;

	pf_vp_dev = pci_iov_get_pf_drvdata(pdev, &virtio_pci_driver);
	if (IS_ERR(pf_vp_dev))
		return NULL;

	return &pf_vp_dev->vdev;
}

module_pci_driver(virtio_pci_driver);

MODULE_AUTHOR("Anthony Liguori <aliguori@us.ibm.com>");
MODULE_DESCRIPTION("virtio-pci");
MODULE_LICENSE("GPL");
MODULE_VERSION("1");

Annotation

• Immediate include surface: `virtio_pci_common.h`.
• Detected declarations: `enum vp_vq_vector_policy`, `function vp_is_avq`, `function vp_synchronize_vectors`, `function vp_notify`, `function vp_vring_slow_path_interrupt`, `function vp_config_changed`, `function vp_vring_interrupt`, `function vp_interrupt`, `function vp_request_msix_vectors`, `function vp_is_slow_path_vector`.
• Atlas domain: Driver Families / drivers/virtio.
• 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.