drivers/media/pci/cx88/cx88-mpeg.c

File Facts

System

Linux kernel

Corpus path

drivers/media/pci/cx88/cx88-mpeg.c

Extension

.c

Size

20063 bytes

Lines

808

Domain

Driver Families

Bucket

drivers/media

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

• cx88.h
• linux/module.h
• linux/slab.h
• linux/init.h
• linux/device.h
• linux/dma-mapping.h
• linux/interrupt.h
• linux/delay.h

Detected Declarations

• function request_module_async
• function request_modules
• function flush_request_modules
• function cx8802_start_dma
• function cx8802_stop_dma
• function cx8802_restart_queue
• function cx8802_buf_prepare
• function cx8802_buf_queue
• function do_cancel_buffers
• function cx8802_cancel_buffers
• function cx8802_mpeg_irq
• function cx8802_irq
• function cx8802_init_common
• function cx8802_fini_common
• function cx8802_suspend_common
• function pci_choose_state
• function cx8802_resume_common
• function cx8802_request_acquire
• function cx8802_request_release
• function cx8802_check_driver
• function cx8802_register_driver
• function list_for_each_entry
• function cx8802_unregister_driver
• function list_for_each_entry
• function list_for_each_entry_safe
• function cx8802_probe
• function cx8802_remove
• function list_for_each_entry_safe
• export cx8802_start_dma
• export cx8802_buf_prepare
• export cx8802_buf_queue
• export cx8802_cancel_buffers
• export cx8802_get_driver
• export cx8802_register_driver
• export cx8802_unregister_driver

Annotated Snippet

static struct pci_driver cx8802_pci_driver = {
	.name     = "cx88-mpeg driver manager",
	.id_table = cx8802_pci_tbl,
	.probe    = cx8802_probe,
	.remove   = cx8802_remove,
};

module_pci_driver(cx8802_pci_driver);

Annotation

• Immediate include surface: `cx88.h`, `linux/module.h`, `linux/slab.h`, `linux/init.h`, `linux/device.h`, `linux/dma-mapping.h`, `linux/interrupt.h`, `linux/delay.h`.
• Detected declarations: `function request_module_async`, `function request_modules`, `function flush_request_modules`, `function cx8802_start_dma`, `function cx8802_stop_dma`, `function cx8802_restart_queue`, `function cx8802_buf_prepare`, `function cx8802_buf_queue`, `function do_cancel_buffers`, `function cx8802_cancel_buffers`.
• Atlas domain: Driver Families / drivers/media.
• 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.