drivers/parisc/gsc.h

File Facts

System

Linux kernel

Corpus path

drivers/parisc/gsc.h

Extension

.h

Size

1541 bytes

Lines

48

Domain

Driver Families

Bucket

drivers/parisc

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/interrupt.h
• asm/hardware.h
• asm/parisc-device.h

Detected Declarations

• struct gsc_irq
• struct gsc_asic

Annotated Snippet

struct gsc_irq {
	unsigned long txn_addr;	/* IRQ "target" */
	int txn_data;		/* HW "IRQ" */
	int irq;		/* virtual IRQ */
};

struct gsc_asic {
	struct parisc_device *gsc;
	unsigned long hpa;
	char *name;
	int version;
	int type;
	int eim;
	struct gsc_irq gsc_irq;
	int global_irq[32];
};

int gsc_common_setup(struct parisc_device *parent, struct gsc_asic *gsc_asic);
int gsc_alloc_irq(struct gsc_irq *dev);			/* dev needs an irq */
int gsc_claim_irq(struct gsc_irq *dev, int irq);	/* dev needs this irq */
int gsc_assign_irq(struct irq_chip *type, void *data);
int gsc_find_local_irq(unsigned int irq, int *global_irq, int limit);
void gsc_fixup_irqs(struct parisc_device *parent, void *ctrl,
		void (*choose)(struct parisc_device *child, void *ctrl));
void gsc_asic_assign_irq(struct gsc_asic *asic, int local_irq, int *irqp);

irqreturn_t gsc_asic_intr(int irq, void *dev);

Annotation

• Immediate include surface: `linux/interrupt.h`, `asm/hardware.h`, `asm/parisc-device.h`.
• Detected declarations: `struct gsc_irq`, `struct gsc_asic`.
• Atlas domain: Driver Families / drivers/parisc.
• 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.