drivers/mtd/sm_ftl.h

Source file repositories/reference/linux-study-clean/drivers/mtd/sm_ftl.h

File Facts

System
Linux kernel
Corpus path
drivers/mtd/sm_ftl.h
Extension
.h
Size
2282 bytes
Lines
88
Domain
Driver Families
Bucket
drivers/mtd
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 ftl_zone {
	bool initialized;
	int16_t *lba_to_phys_table;		/* LBA to physical table */
	struct kfifo free_sectors;	/* queue of free sectors */
};

struct sm_ftl {
	struct mtd_blktrans_dev *trans;

	struct mutex mutex;		/* protects the structure */
	struct ftl_zone *zones;		/* FTL tables for each zone */

	/* Media information */
	int block_size;			/* block size in bytes */
	int zone_size;			/* zone size in blocks */
	int zone_count;			/* number of zones */
	int max_lba;			/* maximum lba in a zone */
	int smallpagenand;		/* 256 bytes/page nand */
	bool readonly;			/* is FS readonly */
	bool unstable;
	int cis_block;			/* CIS block location */
	int cis_boffset;		/* CIS offset in the block */
	int cis_page_offset;		/* CIS offset in the page */

	/* Cache */
	int cache_block;		/* block number of cached block */
	int cache_zone;			/* zone of cached block */
	unsigned char *cache_data;	/* cached block data */
	long unsigned int cache_data_invalid_bitmap;
	bool cache_clean;
	struct work_struct flush_work;
	struct timer_list timer;

	/* Geometry stuff */
	int heads;
	int sectors;
	int cylinders;

	struct attribute_group *disk_attributes;
	u8 cis_buffer[];		/* tmp buffer for cis reads */
};

struct chs_entry {
	unsigned long size;
	unsigned short cyl;
	unsigned char head;
	unsigned char sec;
};


#define SM_FTL_PARTN_BITS	3

#define sm_printk(format, ...) \
	printk(KERN_WARNING "sm_ftl" ": " format "\n", ## __VA_ARGS__)

#define dbg(format, ...) \
	if (debug) \
		printk(KERN_DEBUG "sm_ftl" ": " format "\n", ## __VA_ARGS__)

#define dbg_verbose(format, ...) \
	if (debug > 1) \
		printk(KERN_DEBUG "sm_ftl" ": " format "\n", ## __VA_ARGS__)


static int sm_erase_block(struct sm_ftl *ftl, int zone_num, uint16_t block,
								int put_free);
static void sm_mark_block_bad(struct sm_ftl *ftl, int zone_num, int block);

static int sm_recheck_media(struct sm_ftl *ftl);

Annotation

Implementation Notes