From 683b30c8e78ab363dc8d8c94bdb61b64d1f6f5e2 Mon Sep 17 00:00:00 2001 From: Sean Young Date: Wed, 17 May 2006 12:45:34 +0100 Subject: [PATCH] [MTD] RFD FTL: Be noisier, and don't assume block without RFD magic are erased Signed-off-by: Sean Young Signed-off-by: David Woodhouse --- drivers/mtd/rfd_ftl.c | 48 ++++++++++++++++++++++--------------------- 1 file changed, 25 insertions(+), 23 deletions(-) diff --git a/drivers/mtd/rfd_ftl.c b/drivers/mtd/rfd_ftl.c index a3e00a4635..fa4362fb4d 100644 --- a/drivers/mtd/rfd_ftl.c +++ b/drivers/mtd/rfd_ftl.c @@ -3,7 +3,7 @@ * * Copyright (C) 2005 Sean Young * - * $Id: rfd_ftl.c,v 1.5 2005/11/07 11:14:21 gleixner Exp $ + * $Id: rfd_ftl.c,v 1.8 2006/01/15 12:51:44 sean Exp $ * * This type of flash translation layer (FTL) is used by the Embedded BIOS * by General Software. It is known as the Resident Flash Disk (RFD), see: @@ -61,6 +61,7 @@ struct block { BLOCK_OK, BLOCK_ERASING, BLOCK_ERASED, + BLOCK_UNUSED, BLOCK_FAILED } state; int free_sectors; @@ -99,10 +100,8 @@ static int build_block_map(struct partition *part, int block_no) block->offset = part->block_size * block_no; if (le16_to_cpu(part->header_cache[0]) != RFD_MAGIC) { - block->state = BLOCK_ERASED; /* assumption */ - block->free_sectors = part->data_sectors_per_block; - part->reserved_block = block_no; - return 1; + block->state = BLOCK_UNUSED; + return -ENOENT; } block->state = BLOCK_OK; @@ -124,7 +123,7 @@ static int build_block_map(struct partition *part, int block_no) entry = 0; if (entry >= part->sector_count) { - printk(KERN_NOTICE PREFIX + printk(KERN_WARNING PREFIX "'%s': unit #%d: entry %d corrupt, " "sector %d out of range\n", part->mbd.mtd->name, block_no, i, entry); @@ -132,7 +131,7 @@ static int build_block_map(struct partition *part, int block_no) } if (part->sector_map[entry] != -1) { - printk(KERN_NOTICE PREFIX + printk(KERN_WARNING PREFIX "'%s': more than one entry for sector %d\n", part->mbd.mtd->name, entry); part->errors = 1; @@ -167,7 +166,7 @@ static int scan_header(struct partition *part) /* each erase block has three bytes header, followed by the map */ part->header_sectors_per_block = ((HEADER_MAP_OFFSET + sectors_per_block) * - sizeof(u16) + SECTOR_SIZE - 1) / SECTOR_SIZE; + sizeof(u16) + SECTOR_SIZE - 1) / SECTOR_SIZE; part->data_sectors_per_block = sectors_per_block - part->header_sectors_per_block; @@ -226,7 +225,7 @@ static int scan_header(struct partition *part) } if (part->reserved_block == -1) { - printk(KERN_NOTICE PREFIX "'%s': no empty erase unit found\n", + printk(KERN_WARNING PREFIX "'%s': no empty erase unit found\n", part->mbd.mtd->name); part->errors = 1; @@ -315,7 +314,7 @@ static void erase_callback(struct erase_info *erase) rc = -EIO; if (rc) { - printk(KERN_NOTICE PREFIX "'%s': unable to write RFD " + printk(KERN_ERR PREFIX "'%s': unable to write RFD " "header at 0x%lx\n", part->mbd.mtd->name, part->blocks[i].offset); @@ -348,7 +347,7 @@ static int erase_block(struct partition *part, int block) rc = part->mbd.mtd->erase(part->mbd.mtd, erase); if (rc) { - printk(KERN_WARNING PREFIX "erase of region %x,%x on '%s' " + printk(KERN_ERR PREFIX "erase of region %x,%x on '%s' " "failed\n", erase->addr, erase->len, part->mbd.mtd->name); kfree(erase); @@ -383,7 +382,7 @@ static int move_block_contents(struct partition *part, int block_no, u_long *old rc = -EIO; if (rc) { - printk(KERN_NOTICE PREFIX "error reading '%s' at " + printk(KERN_ERR PREFIX "error reading '%s' at " "0x%lx\n", part->mbd.mtd->name, part->blocks[block_no].offset); @@ -423,7 +422,7 @@ static int move_block_contents(struct partition *part, int block_no, u_long *old rc = -EIO; if (rc) { - printk(KERN_NOTICE PREFIX "'%s': Unable to " + printk(KERN_ERR PREFIX "'%s': Unable to " "read sector for relocation\n", part->mbd.mtd->name); @@ -520,7 +519,7 @@ static int reclaim_block(struct partition *part, u_long *old_sector) * because if we fill that one up first it'll have the most chance of having * the least live sectors at reclaim. */ -static int find_free_block(const struct partition *part) +static int find_free_block(struct partition *part) { int block, stop; @@ -533,6 +532,9 @@ static int find_free_block(const struct partition *part) block != part->reserved_block) return block; + if (part->blocks[block].state == BLOCK_UNUSED) + erase_block(part, block); + if (++block >= part->total_blocks) block = 0; @@ -541,7 +543,7 @@ static int find_free_block(const struct partition *part) return -1; } -static int find_writeable_block(struct partition *part, u_long *old_sector) +static int find_writable_block(struct partition *part, u_long *old_sector) { int rc, block; size_t retlen; @@ -570,7 +572,7 @@ static int find_writeable_block(struct partition *part, u_long *old_sector) rc = -EIO; if (rc) { - printk(KERN_NOTICE PREFIX "'%s': unable to read header at " + printk(KERN_ERR PREFIX "'%s': unable to read header at " "0x%lx\n", part->mbd.mtd->name, part->blocks[block].offset); goto err; @@ -602,7 +604,7 @@ static int mark_sector_deleted(struct partition *part, u_long old_addr) rc = -EIO; if (rc) { - printk(KERN_WARNING PREFIX "error writing '%s' at " + printk(KERN_ERR PREFIX "error writing '%s' at " "0x%lx\n", part->mbd.mtd->name, addr); if (rc) goto err; @@ -652,7 +654,7 @@ static int do_writesect(struct mtd_blktrans_dev *dev, u_long sector, char *buf, if (part->current_block == -1 || !part->blocks[part->current_block].free_sectors) { - rc = find_writeable_block(part, old_addr); + rc = find_writable_block(part, old_addr); if (rc) goto err; } @@ -675,7 +677,7 @@ static int do_writesect(struct mtd_blktrans_dev *dev, u_long sector, char *buf, rc = -EIO; if (rc) { - printk(KERN_WARNING PREFIX "error writing '%s' at 0x%lx\n", + printk(KERN_ERR PREFIX "error writing '%s' at 0x%lx\n", part->mbd.mtd->name, addr); if (rc) goto err; @@ -695,7 +697,7 @@ static int do_writesect(struct mtd_blktrans_dev *dev, u_long sector, char *buf, rc = -EIO; if (rc) { - printk(KERN_WARNING PREFIX "error writing '%s' at 0x%lx\n", + printk(KERN_ERR PREFIX "error writing '%s' at 0x%lx\n", part->mbd.mtd->name, addr); if (rc) goto err; @@ -776,7 +778,7 @@ static void rfd_ftl_add_mtd(struct mtd_blktrans_ops *tr, struct mtd_info *mtd) part->block_size = block_size; else { if (!mtd->erasesize) { - printk(KERN_NOTICE PREFIX "please provide block_size"); + printk(KERN_WARNING PREFIX "please provide block_size"); return; } else @@ -791,8 +793,8 @@ static void rfd_ftl_add_mtd(struct mtd_blktrans_ops *tr, struct mtd_info *mtd) if (!(mtd->flags & MTD_WRITEABLE)) part->mbd.readonly = 1; else if (part->errors) { - printk(KERN_NOTICE PREFIX "'%s': errors found, " - "setting read-only", mtd->name); + printk(KERN_WARNING PREFIX "'%s': errors found, " + "setting read-only\n", mtd->name); part->mbd.readonly = 1; } -- 2.39.5