drivers/media/pci/ivtv/ivtv-irq.h

File Facts

System

Linux kernel

Corpus path

drivers/media/pci/ivtv/ivtv-irq.h

Extension

.h

Size

1381 bytes

Lines

42

Domain

Driver Families

Bucket

drivers/media

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

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

interrupt handling
    Copyright (C) 2003-2004  Kevin Thayer <nufan_wfk at yahoo.com>
    Copyright (C) 2004  Chris Kennedy <c@groovy.org>
    Copyright (C) 2005-2007  Hans Verkuil <hverkuil@kernel.org>

 */

#ifndef IVTV_IRQ_H
#define IVTV_IRQ_H

#define IVTV_IRQ_ENC_START_CAP		BIT(31)
#define IVTV_IRQ_ENC_EOS		BIT(30)
#define IVTV_IRQ_ENC_VBI_CAP		BIT(29)
#define IVTV_IRQ_ENC_VIM_RST		BIT(28)
#define IVTV_IRQ_ENC_DMA_COMPLETE	BIT(27)
#define IVTV_IRQ_ENC_PIO_COMPLETE	BIT(25)
#define IVTV_IRQ_DEC_AUD_MODE_CHG	BIT(24)
#define IVTV_IRQ_DEC_DATA_REQ		BIT(22)
#define IVTV_IRQ_DEC_DMA_COMPLETE	BIT(20)
#define IVTV_IRQ_DEC_VBI_RE_INSERT	BIT(19)
#define IVTV_IRQ_DMA_ERR		BIT(18)
#define IVTV_IRQ_DMA_WRITE		BIT(17)
#define IVTV_IRQ_DMA_READ		BIT(16)
#define IVTV_IRQ_DEC_VSYNC		BIT(10)

/* IRQ Masks */
#define IVTV_IRQ_MASK_INIT (IVTV_IRQ_DMA_ERR|IVTV_IRQ_ENC_DMA_COMPLETE|\
		IVTV_IRQ_DMA_READ|IVTV_IRQ_ENC_PIO_COMPLETE)

#define IVTV_IRQ_MASK_CAPTURE (IVTV_IRQ_ENC_START_CAP | IVTV_IRQ_ENC_EOS)
#define IVTV_IRQ_MASK_DECODE  (IVTV_IRQ_DEC_DATA_REQ|IVTV_IRQ_DEC_AUD_MODE_CHG)

irqreturn_t ivtv_irq_handler(int irq, void *dev_id);

void ivtv_irq_work_handler(struct kthread_work *work);
void ivtv_dma_stream_dec_prepare(struct ivtv_stream *s, u32 offset, int lock);
void ivtv_unfinished_dma(struct timer_list *t);

#endif

Annotation

• Atlas domain: Driver Families / drivers/media.
• 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.