drivers/dma/dw-edma/dw-edma-pcie.c

File Facts

System

Linux kernel

Corpus path

drivers/dma/dw-edma/dw-edma-pcie.c

Extension

.c

Size

16171 bytes

Lines

566

Domain

Driver Families

Bucket

drivers/dma

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.
• 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/kernel.h
• linux/module.h
• linux/pci.h
• linux/device.h
• linux/dma/edma.h
• linux/pci-epf.h
• linux/msi.h
• linux/bitfield.h
• linux/sizes.h
• dw-edma-core.h

Detected Declarations

• struct dw_edma_block
• struct dw_edma_pcie_data
• function dw_edma_set_chan_region_offset
• function dw_edma_pcie_irq_vector
• function dw_edma_pcie_address
• function dw_edma_pcie_get_synopsys_dma_data
• function dw_edma_pcie_get_xilinx_dma_data
• function dw_edma_get_phys_addr
• function dw_edma_pcie_probe
• function dw_edma_pcie_remove

Annotated Snippet

static struct pci_driver dw_edma_pcie_driver = {
	.name		= "dw-edma-pcie",
	.id_table	= dw_edma_pcie_id_table,
	.probe		= dw_edma_pcie_probe,
	.remove		= dw_edma_pcie_remove,
};

module_pci_driver(dw_edma_pcie_driver);

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

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/module.h`, `linux/pci.h`, `linux/device.h`, `linux/dma/edma.h`, `linux/pci-epf.h`, `linux/msi.h`, `linux/bitfield.h`.
• Detected declarations: `struct dw_edma_block`, `struct dw_edma_pcie_data`, `function dw_edma_set_chan_region_offset`, `function dw_edma_pcie_irq_vector`, `function dw_edma_pcie_address`, `function dw_edma_pcie_get_synopsys_dma_data`, `function dw_edma_pcie_get_xilinx_dma_data`, `function dw_edma_get_phys_addr`, `function dw_edma_pcie_probe`, `function dw_edma_pcie_remove`.
• Atlas domain: Driver Families / drivers/dma.
• Implementation status: pattern 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.