drivers/comedi/drivers/gsc_hpdi.c

File Facts

System

Linux kernel

Corpus path

drivers/comedi/drivers/gsc_hpdi.c

Extension

.c

Size

20427 bytes

Lines

723

Domain

Driver Families

Bucket

drivers/comedi

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/module.h
• linux/delay.h
• linux/interrupt.h
• linux/comedi/comedi_pci.h
• plx9080.h

Detected Declarations

• struct hpdi_private
• function gsc_hpdi_drain_dma
• function gsc_hpdi_interrupt
• function gsc_hpdi_abort_dma
• function gsc_hpdi_cancel
• function gsc_hpdi_cmd
• function gsc_hpdi_check_chanlist
• function gsc_hpdi_cmd_test
• function gsc_hpdi_setup_dma_descriptors
• function gsc_hpdi_dio_insn_config
• function gsc_hpdi_free_dma
• function gsc_hpdi_init
• function gsc_hpdi_init_plx9080
• function gsc_hpdi_auto_attach
• function gsc_hpdi_detach
• function gsc_hpdi_pci_probe

Annotated Snippet

static struct pci_driver gsc_hpdi_pci_driver = {
	.name		= "gsc_hpdi",
	.id_table	= gsc_hpdi_pci_table,
	.probe		= gsc_hpdi_pci_probe,
	.remove		= comedi_pci_auto_unconfig,
};
module_comedi_pci_driver(gsc_hpdi_driver, gsc_hpdi_pci_driver);

MODULE_AUTHOR("Comedi https://www.comedi.org");
MODULE_DESCRIPTION("Comedi driver for General Standards PCI-HPDI32/PMC-HPDI32");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/module.h`, `linux/delay.h`, `linux/interrupt.h`, `linux/comedi/comedi_pci.h`, `plx9080.h`.
• Detected declarations: `struct hpdi_private`, `function gsc_hpdi_drain_dma`, `function gsc_hpdi_interrupt`, `function gsc_hpdi_abort_dma`, `function gsc_hpdi_cancel`, `function gsc_hpdi_cmd`, `function gsc_hpdi_check_chanlist`, `function gsc_hpdi_cmd_test`, `function gsc_hpdi_setup_dma_descriptors`, `function gsc_hpdi_dio_insn_config`.
• Atlas domain: Driver Families / drivers/comedi.
• 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.