cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

sm_ftl.h (2283B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * Copyright © 2009 - Maxim Levitsky
      4 * SmartMedia/xD translation layer
      5 *
      6 * Based loosly on ssfdc.c which is
      7 *  © 2005 Eptar srl
      8 *  Author: Claudio Lanconelli <lanconelli.claudio@eptar.com>
      9 */
     10
     11#include <linux/mtd/blktrans.h>
     12#include <linux/kfifo.h>
     13#include <linux/sched.h>
     14#include <linux/completion.h>
     15#include <linux/mtd/mtd.h>
     16
     17
     18
     19struct ftl_zone {
     20	bool initialized;
     21	int16_t *lba_to_phys_table;		/* LBA to physical table */
     22	struct kfifo free_sectors;	/* queue of free sectors */
     23};
     24
     25struct sm_ftl {
     26	struct mtd_blktrans_dev *trans;
     27
     28	struct mutex mutex;		/* protects the structure */
     29	struct ftl_zone *zones;		/* FTL tables for each zone */
     30
     31	/* Media information */
     32	int block_size;			/* block size in bytes */
     33	int zone_size;			/* zone size in blocks */
     34	int zone_count;			/* number of zones */
     35	int max_lba;			/* maximum lba in a zone */
     36	int smallpagenand;		/* 256 bytes/page nand */
     37	bool readonly;			/* is FS readonly */
     38	bool unstable;
     39	int cis_block;			/* CIS block location */
     40	int cis_boffset;		/* CIS offset in the block */
     41	int cis_page_offset;		/* CIS offset in the page */
     42	void *cis_buffer;		/* tmp buffer for cis reads */
     43
     44	/* Cache */
     45	int cache_block;		/* block number of cached block */
     46	int cache_zone;			/* zone of cached block */
     47	unsigned char *cache_data;	/* cached block data */
     48	long unsigned int cache_data_invalid_bitmap;
     49	bool cache_clean;
     50	struct work_struct flush_work;
     51	struct timer_list timer;
     52
     53	/* Geometry stuff */
     54	int heads;
     55	int sectors;
     56	int cylinders;
     57
     58	struct attribute_group *disk_attributes;
     59};
     60
     61struct chs_entry {
     62	unsigned long size;
     63	unsigned short cyl;
     64	unsigned char head;
     65	unsigned char sec;
     66};
     67
     68
     69#define SM_FTL_PARTN_BITS	3
     70
     71#define sm_printk(format, ...) \
     72	printk(KERN_WARNING "sm_ftl" ": " format "\n", ## __VA_ARGS__)
     73
     74#define dbg(format, ...) \
     75	if (debug) \
     76		printk(KERN_DEBUG "sm_ftl" ": " format "\n", ## __VA_ARGS__)
     77
     78#define dbg_verbose(format, ...) \
     79	if (debug > 1) \
     80		printk(KERN_DEBUG "sm_ftl" ": " format "\n", ## __VA_ARGS__)
     81
     82
     83static int sm_erase_block(struct sm_ftl *ftl, int zone_num, uint16_t block,
     84								int put_free);
     85static void sm_mark_block_bad(struct sm_ftl *ftl, int zone_num, int block);
     86
     87static int sm_recheck_media(struct sm_ftl *ftl);