drivers/nvdimm/pmem.h

Source file repositories/reference/linux-study-clean/drivers/nvdimm/pmem.h

File Facts

System
Linux kernel
Corpus path
drivers/nvdimm/pmem.h
Extension
.h
Size
1221 bytes
Lines
46
Domain
Driver Families
Bucket
drivers/nvdimm
Inferred role
Driver Families: implementation source
Status
source 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.

Dependency Surface

Detected Declarations

Annotated Snippet

struct pmem_device {
	/* One contiguous memory region per device */
	phys_addr_t		phys_addr;
	/* when non-zero this device is hosting a 'pfn' instance */
	phys_addr_t		data_offset;
	void			*virt_addr;
	/* immutable base size of the namespace */
	size_t			size;
	/* trim size when namespace capacity has been section aligned */
	u32			pfn_pad;
	struct kernfs_node	*bb_state;
	struct badblocks	bb;
	struct dax_device	*dax_dev;
	struct gendisk		*disk;
	struct dev_pagemap	pgmap;
};

long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff,
		long nr_pages, enum dax_access_mode mode, void **kaddr,
		unsigned long *pfn);

#ifdef CONFIG_MEMORY_FAILURE
static inline bool test_and_clear_pmem_poison(struct page *page)
{
	return TestClearPageHWPoison(page);
}
#else
static inline bool test_and_clear_pmem_poison(struct page *page)
{
	return false;
}
#endif
#endif /* __NVDIMM_PMEM_H__ */

Annotation

Implementation Notes