drivers/staging/media/ipu3/ipu3.c

File Facts

System

Linux kernel

Corpus path

drivers/staging/media/ipu3/ipu3.c

Extension

.c

Size

22181 bytes

Lines

866

Domain

Driver Families

Bucket

drivers/staging

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

• linux/delay.h
• linux/interrupt.h
• linux/module.h
• linux/pm_runtime.h
• ipu3.h
• ipu3-css-fw.h
• ipu3-dmamap.h
• ipu3-mmu.h

Detected Declarations

• function imgu_node_to_queue
• function imgu_map_node
• function imgu_dummybufs_cleanup
• function imgu_dummybufs_preallocate
• function imgu_dummybufs_init
• function imgu_dummybufs_check
• function imgu_buffer_done
• function imgu_queue_buffers
• function list_for_each_entry_safe
• function imgu_powerup
• function imgu_powerdown
• function imgu_s_stream
• function for_each_set_bit
• function imgu_video_nodes_exit
• function imgu_video_nodes_init
• function imgu_isr_threaded
• function imgu_isr
• function imgu_pci_config_setup
• function imgu_pci_probe
• function imgu_pci_remove
• function imgu_suspend
• function imgu_resume
• function for_each_set_bit
• function imgu_rpm_dummy_cb

Annotated Snippet

static struct pci_driver imgu_pci_driver = {
	.name = IMGU_NAME,
	.id_table = imgu_pci_tbl,
	.probe = imgu_pci_probe,
	.remove = imgu_pci_remove,
	.driver = {
		.pm = &imgu_pm_ops,
	},
};

module_pci_driver(imgu_pci_driver);

MODULE_AUTHOR("Tuukka Toivonen");
MODULE_AUTHOR("Tianshu Qiu <tian.shu.qiu@intel.com>");
MODULE_AUTHOR("Jian Xu Zheng");
MODULE_AUTHOR("Yuning Pu");
MODULE_AUTHOR("Yong Zhi <yong.zhi@intel.com>");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Intel ipu3_imgu PCI driver");
MODULE_FIRMWARE(IMGU_FW_NAME);
MODULE_FIRMWARE(IMGU_FW_NAME_20161208);
MODULE_FIRMWARE(IMGU_FW_NAME_IPU_20161208);

Annotation

• Immediate include surface: `linux/delay.h`, `linux/interrupt.h`, `linux/module.h`, `linux/pm_runtime.h`, `ipu3.h`, `ipu3-css-fw.h`, `ipu3-dmamap.h`, `ipu3-mmu.h`.
• Detected declarations: `function imgu_node_to_queue`, `function imgu_map_node`, `function imgu_dummybufs_cleanup`, `function imgu_dummybufs_preallocate`, `function imgu_dummybufs_init`, `function imgu_dummybufs_check`, `function imgu_buffer_done`, `function imgu_queue_buffers`, `function list_for_each_entry_safe`, `function imgu_powerup`.
• Atlas domain: Driver Families / drivers/staging.
• 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.