drivers/mtd/maps/vmu-flash.c

File Facts

System

Linux kernel

Corpus path

drivers/mtd/maps/vmu-flash.c

Extension

.c

Size

19709 bytes

Lines

817

Domain

Driver Families

Bucket

drivers/mtd

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.
• 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/init.h
• linux/slab.h
• linux/sched.h
• linux/delay.h
• linux/maple.h
• linux/mtd/mtd.h
• linux/mtd/map.h

Detected Declarations

• struct vmu_cache
• struct mdev_part
• struct vmupart
• struct memcard
• struct vmu_block
• function vmu_blockread
• function maple_vmu_read_block
• function read
• function maple_vmu_write_block
• function vmu_flash_read_char
• function vmu_flash_read
• function vmu_flash_write
• function vmu_flash_sync
• function the
• function vmu_connect
• function vmu_disconnect
• function vmu_can_unload
• function vmu_file_error
• function probe_maple_vmu
• function remove_maple_vmu
• function vmu_flash_map_init
• function vmu_flash_map_exit
• module init vmu_flash_map_init

Annotated Snippet

module_init(vmu_flash_map_init);
module_exit(vmu_flash_map_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Adrian McMenamin");
MODULE_DESCRIPTION("Flash mapping for Sega Dreamcast visual memory");

Annotation

• Immediate include surface: `linux/init.h`, `linux/slab.h`, `linux/sched.h`, `linux/delay.h`, `linux/maple.h`, `linux/mtd/mtd.h`, `linux/mtd/map.h`.
• Detected declarations: `struct vmu_cache`, `struct mdev_part`, `struct vmupart`, `struct memcard`, `struct vmu_block`, `function vmu_blockread`, `function maple_vmu_read_block`, `function read`, `function maple_vmu_write_block`, `function vmu_flash_read_char`.
• Atlas domain: Driver Families / drivers/mtd.
• Implementation status: integration 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.