drivers/misc/dw-xdata-pcie.c

File Facts

System

Linux kernel

Corpus path

drivers/misc/dw-xdata-pcie.c

Extension

.c

Size

9922 bytes

Lines

422

Domain

Driver Families

Bucket

drivers/misc

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.
• 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/miscdevice.h
• linux/bitfield.h
• linux/pci-epf.h
• linux/kernel.h
• linux/module.h
• linux/device.h
• linux/bitops.h
• linux/mutex.h
• linux/delay.h
• linux/pci.h
• linux/string_choices.h

Detected Declarations

• struct dw_xdata_regs
• struct dw_xdata_region
• struct dw_xdata
• function dw_xdata_stop
• function dw_xdata_start
• function dw_xdata_perf_meas
• function dw_xdata_perf_diff
• function dw_xdata_perf
• function write_show
• function write_store
• function read_show
• function read_store
• function dw_xdata_pcie_probe
• function dw_xdata_pcie_remove

Annotated Snippet

static struct pci_driver dw_xdata_pcie_driver = {
	.name		= DW_XDATA_DRIVER_NAME,
	.id_table	= dw_xdata_pcie_id_table,
	.probe		= dw_xdata_pcie_probe,
	.remove		= dw_xdata_pcie_remove,
};

module_pci_driver(dw_xdata_pcie_driver);

MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Synopsys DesignWare xData PCIe driver");
MODULE_AUTHOR("Gustavo Pimentel <gustavo.pimentel@synopsys.com>");

Annotation

• Immediate include surface: `linux/miscdevice.h`, `linux/bitfield.h`, `linux/pci-epf.h`, `linux/kernel.h`, `linux/module.h`, `linux/device.h`, `linux/bitops.h`, `linux/mutex.h`.
• Detected declarations: `struct dw_xdata_regs`, `struct dw_xdata_region`, `struct dw_xdata`, `function dw_xdata_stop`, `function dw_xdata_start`, `function dw_xdata_perf_meas`, `function dw_xdata_perf_diff`, `function dw_xdata_perf`, `function write_show`, `function write_store`.
• Atlas domain: Driver Families / drivers/misc.
• Implementation status: pattern implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.