drivers/net/ethernet/intel/ice/ice_irq.h

File Facts

System

Linux kernel

Corpus path

drivers/net/ethernet/intel/ice/ice_irq.h

Extension

.h

Size

1014 bytes

Lines

37

Domain

Driver Families

Bucket

drivers/net

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

• No C-style include directives detected by the generator.

Detected Declarations

• struct ice_irq_entry
• struct ice_irq_tracker
• struct ice_virt_irq_tracker

Annotated Snippet

struct ice_irq_entry {
	unsigned int index;
	bool dynamic;	/* allocation type flag */
};

struct ice_irq_tracker {
	struct xarray entries;
	u16 num_entries;	/* total vectors available */
	u16 num_static;	/* preallocated entries */
};

struct ice_virt_irq_tracker {
	unsigned long *bm;	/* bitmap to track irq usage */
	u32 num_entries;
	/* First MSIX vector used by SR-IOV VFs. Calculated by subtracting the
	 * number of MSIX vectors needed for all SR-IOV VFs from the number of
	 * MSIX vectors allowed on this PF.
	 */
	u32 base;
};

int ice_init_interrupt_scheme(struct ice_pf *pf);
void ice_clear_interrupt_scheme(struct ice_pf *pf);

struct msi_map ice_alloc_irq(struct ice_pf *pf, bool dyn_only);
void ice_free_irq(struct ice_pf *pf, struct msi_map map);

int ice_virt_get_irqs(struct ice_pf *pf, u32 needed);
void ice_virt_free_irqs(struct ice_pf *pf, u32 index, u32 irqs);
#endif

Annotation

• Detected declarations: `struct ice_irq_entry`, `struct ice_irq_tracker`, `struct ice_virt_irq_tracker`.
• Atlas domain: Driver Families / drivers/net.
• 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.