drivers/net/ethernet/stmicro/stmmac/stmmac_libpci.c
Source file repositories/reference/linux-study-clean/drivers/net/ethernet/stmicro/stmmac/stmmac_libpci.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/net/ethernet/stmicro/stmmac/stmmac_libpci.c- Extension
.c- Size
- 937 bytes
- Lines
- 49
- Domain
- Driver Families
- Bucket
- drivers/net
- Inferred role
- Driver Families: exported/initcall integration point
- Status
- integration 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.
- Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/device.hlinux/pci.hstmmac_libpci.h
Detected Declarations
function Copyrightfunction stmmac_pci_plat_resumeexport stmmac_pci_plat_suspendexport stmmac_pci_plat_resume
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0-only
/*
* PCI bus helpers for STMMAC driver
* Copyright (C) 2025 Yao Zi <ziyao@disroot.org>
*/
#include <linux/device.h>
#include <linux/pci.h>
#include "stmmac_libpci.h"
int stmmac_pci_plat_suspend(struct device *dev, void *bsp_priv)
{
struct pci_dev *pdev = to_pci_dev(dev);
int ret;
ret = pci_save_state(pdev);
if (ret)
return ret;
pci_disable_device(pdev);
pci_wake_from_d3(pdev, true);
return 0;
}
EXPORT_SYMBOL_GPL(stmmac_pci_plat_suspend);
int stmmac_pci_plat_resume(struct device *dev, void *bsp_priv)
{
struct pci_dev *pdev = to_pci_dev(dev);
int ret;
pci_restore_state(pdev);
pci_set_power_state(pdev, PCI_D0);
ret = pci_enable_device(pdev);
if (ret)
return ret;
pci_set_master(pdev);
return 0;
}
EXPORT_SYMBOL_GPL(stmmac_pci_plat_resume);
MODULE_DESCRIPTION("STMMAC PCI helper library");
MODULE_AUTHOR("Yao Zi <ziyao@disroot.org>");
MODULE_LICENSE("GPL");
Annotation
- Immediate include surface: `linux/device.h`, `linux/pci.h`, `stmmac_libpci.h`.
- Detected declarations: `function Copyright`, `function stmmac_pci_plat_resume`, `export stmmac_pci_plat_suspend`, `export stmmac_pci_plat_resume`.
- Atlas domain: Driver Families / drivers/net.
- Implementation status: integration implementation candidate.
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.