drivers/vfio/cdx/private.h

File Facts

System

Linux kernel

Corpus path

drivers/vfio/cdx/private.h

Extension

.h

Size

1304 bytes

Lines

65

Domain

Driver Families

Bucket

drivers/vfio

Inferred role

Driver Families: implementation source

Status

source 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.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/mutex.h

Detected Declarations

• struct vfio_cdx_irq
• struct vfio_cdx_region
• struct vfio_cdx_device
• function Copyright
• function vfio_cdx_set_irqs_ioctl
• function vfio_cdx_irqs_cleanup

Annotated Snippet

struct vfio_cdx_irq {
	u32			flags;
	u32			count;
	int			irq_no;
	struct eventfd_ctx	*trigger;
	char			*name;
};

struct vfio_cdx_region {
	u32			flags;
	u32			type;
	u64			addr;
	resource_size_t		size;
};

struct vfio_cdx_device {
	struct vfio_device	vdev;
	struct vfio_cdx_region	*regions;
	struct mutex		cdx_irqs_lock;
	struct vfio_cdx_irq	*cdx_irqs;
	u32			flags;
#define BME_SUPPORT BIT(0)
	u32			msi_count;
};

#ifdef CONFIG_GENERIC_MSI_IRQ
int vfio_cdx_set_irqs_ioctl(struct vfio_cdx_device *vdev,
			    u32 flags, unsigned int index,
			    unsigned int start, unsigned int count,
			    void *data);

void vfio_cdx_irqs_cleanup(struct vfio_cdx_device *vdev);
#else
static int vfio_cdx_set_irqs_ioctl(struct vfio_cdx_device *vdev,
				   u32 flags, unsigned int index,
				   unsigned int start, unsigned int count,
				   void *data)
{
	return -EINVAL;
}

static void vfio_cdx_irqs_cleanup(struct vfio_cdx_device *vdev)
{
}
#endif

#endif /* VFIO_CDX_PRIVATE_H */

Annotation

• Immediate include surface: `linux/mutex.h`.
• Detected declarations: `struct vfio_cdx_irq`, `struct vfio_cdx_region`, `struct vfio_cdx_device`, `function Copyright`, `function vfio_cdx_set_irqs_ioctl`, `function vfio_cdx_irqs_cleanup`.
• Atlas domain: Driver Families / drivers/vfio.
• Implementation status: source implementation candidate.
• 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.