drivers/dax/bus.h

File Facts

System

Linux kernel

Corpus path

drivers/dax/bus.h

Extension

.h

Size

2092 bytes

Lines

80

Domain

Driver Families

Bucket

drivers/dax

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

Dependency Surface

• linux/device.h
• linux/platform_device.h
• linux/range.h
• linux/workqueue.h

Detected Declarations

• struct dev_dax
• struct resource
• struct dax_device
• struct dax_region
• struct dev_dax_data
• struct dax_device_driver
• struct hmem_platform_device
• enum dax_driver_type
• function to_hmem_platform_device
• function dax_hmem_flush_work

Annotated Snippet

struct device_driver drv;
	struct list_head ids;
	enum dax_driver_type type;
	int (*probe)(struct dev_dax *dev);
	void (*remove)(struct dev_dax *dev);
};

#define to_dax_drv(__drv) container_of_const(__drv, struct dax_device_driver, drv)

int __dax_driver_register(struct dax_device_driver *dax_drv,
		struct module *module, const char *mod_name);
#define dax_driver_register(driver) \
	__dax_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
void dax_driver_unregister(struct dax_device_driver *dax_drv);
void kill_dev_dax(struct dev_dax *dev_dax);
bool static_dev_dax(struct dev_dax *dev_dax);

struct hmem_platform_device {
	struct platform_device pdev;
	struct work_struct work;
	bool did_probe;
};

static inline struct hmem_platform_device *
to_hmem_platform_device(struct platform_device *pdev)
{
	return container_of(pdev, struct hmem_platform_device, pdev);
}

#if IS_ENABLED(CONFIG_DEV_DAX_HMEM)
void dax_hmem_flush_work(void);
#else
static inline void dax_hmem_flush_work(void) { }
#endif

#define MODULE_ALIAS_DAX_DEVICE(type) \
	MODULE_ALIAS("dax:t" __stringify(type) "*")
#define DAX_DEVICE_MODALIAS_FMT "dax:t%d"

#endif /* __DAX_BUS_H__ */

Annotation

• Immediate include surface: `linux/device.h`, `linux/platform_device.h`, `linux/range.h`, `linux/workqueue.h`.
• Detected declarations: `struct dev_dax`, `struct resource`, `struct dax_device`, `struct dax_region`, `struct dev_dax_data`, `struct dax_device_driver`, `struct hmem_platform_device`, `enum dax_driver_type`, `function to_hmem_platform_device`, `function dax_hmem_flush_work`.
• Atlas domain: Driver Families / drivers/dax.
• Implementation status: pattern 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.