diff options
Diffstat (limited to 'drivers/mtd/ftl.c')
| -rw-r--r-- | drivers/mtd/ftl.c | 128 |
1 files changed, 64 insertions, 64 deletions
diff --git a/drivers/mtd/ftl.c b/drivers/mtd/ftl.c index d32c1b3a8ce..de7e231d6d1 100644 --- a/drivers/mtd/ftl.c +++ b/drivers/mtd/ftl.c @@ -1,5 +1,5 @@ /* This version ported to the Linux-MTD system by dwmw2@infradead.org - * $Id: ftl.c,v 1.55 2005/01/17 13:47:21 hvr Exp $ + * $Id: ftl.c,v 1.58 2005/11/07 11:14:19 gleixner Exp $ * * Fixes: Arnaldo Carvalho de Melo <acme@conectiva.com.br> * - fixes some leaks on failure in build_maps and ftl_notify_add, cleanups @@ -53,7 +53,7 @@ Use of the FTL format for non-PCMCIA applications may be an infringement of these patents. For additional information, contact M-Systems (http://www.m-sys.com) directly. - + ======================================================================*/ #include <linux/mtd/blktrans.h> #include <linux/module.h> @@ -160,7 +160,7 @@ static void ftl_erase_callback(struct erase_info *done); Scan_header() checks to see if a memory region contains an FTL partition. build_maps() reads all the erase unit headers, builds the erase unit map, and then builds the virtual page map. - + ======================================================================*/ static int scan_header(partition_t *part) @@ -176,10 +176,10 @@ static int scan_header(partition_t *part) (offset + sizeof(header)) < max_offset; offset += part->mbd.mtd->erasesize ? : 0x2000) { - err = part->mbd.mtd->read(part->mbd.mtd, offset, sizeof(header), &ret, + err = part->mbd.mtd->read(part->mbd.mtd, offset, sizeof(header), &ret, (unsigned char *)&header); - - if (err) + + if (err) return err; if (strcmp(header.DataOrgTuple+3, "FTL100") == 0) break; @@ -232,10 +232,10 @@ static int build_maps(partition_t *part) for (i = 0; i < le16_to_cpu(part->header.NumEraseUnits); i++) { offset = ((i + le16_to_cpu(part->header.FirstPhysicalEUN)) << part->header.EraseUnitSize); - ret = part->mbd.mtd->read(part->mbd.mtd, offset, sizeof(header), &retval, + ret = part->mbd.mtd->read(part->mbd.mtd, offset, sizeof(header), &retval, (unsigned char *)&header); - - if (ret) + + if (ret) goto out_XferInfo; ret = -1; @@ -274,7 +274,7 @@ static int build_maps(partition_t *part) "don't add up!\n"); goto out_XferInfo; } - + /* Set up virtual page map */ blocks = le32_to_cpu(header.FormattedSize) >> header.BlockSize; part->VirtualBlockMap = vmalloc(blocks * sizeof(u_int32_t)); @@ -296,12 +296,12 @@ static int build_maps(partition_t *part) part->EUNInfo[i].Free = 0; part->EUNInfo[i].Deleted = 0; offset = part->EUNInfo[i].Offset + le32_to_cpu(header.BAMOffset); - - ret = part->mbd.mtd->read(part->mbd.mtd, offset, - part->BlocksPerUnit * sizeof(u_int32_t), &retval, + + ret = part->mbd.mtd->read(part->mbd.mtd, offset, + part->BlocksPerUnit * sizeof(u_int32_t), &retval, (unsigned char *)part->bam_cache); - - if (ret) + + if (ret) goto out_bam_cache; for (j = 0; j < part->BlocksPerUnit; j++) { @@ -316,7 +316,7 @@ static int build_maps(partition_t *part) part->EUNInfo[i].Deleted++; } } - + ret = 0; goto out; @@ -336,7 +336,7 @@ out: Erase_xfer() schedules an asynchronous erase operation for a transfer unit. - + ======================================================================*/ static int erase_xfer(partition_t *part, @@ -351,10 +351,10 @@ static int erase_xfer(partition_t *part, xfer->state = XFER_ERASING; /* Is there a free erase slot? Always in MTD. */ - - + + erase=kmalloc(sizeof(struct erase_info), GFP_KERNEL); - if (!erase) + if (!erase) return -ENOMEM; erase->mtd = part->mbd.mtd; @@ -362,7 +362,7 @@ static int erase_xfer(partition_t *part, erase->addr = xfer->Offset; erase->len = 1 << part->header.EraseUnitSize; erase->priv = (u_long)part; - + ret = part->mbd.mtd->erase(part->mbd.mtd, erase); if (!ret) @@ -377,7 +377,7 @@ static int erase_xfer(partition_t *part, Prepare_xfer() takes a freshly erased transfer unit and gives it an appropriate header. - + ======================================================================*/ static void ftl_erase_callback(struct erase_info *erase) @@ -385,7 +385,7 @@ static void ftl_erase_callback(struct erase_info *erase) partition_t *part; struct xfer_info_t *xfer; int i; - + /* Look up the transfer unit */ part = (partition_t *)(erase->priv); @@ -422,7 +422,7 @@ static int prepare_xfer(partition_t *part, int i) xfer = &part->XferInfo[i]; xfer->state = XFER_FAILED; - + DEBUG(1, "ftl_cs: preparing xfer unit at 0x%x\n", xfer->Offset); /* Write the transfer unit header */ @@ -446,7 +446,7 @@ static int prepare_xfer(partition_t *part, int i) for (i = 0; i < nbam; i++, offset += sizeof(u_int32_t)) { - ret = part->mbd.mtd->write(part->mbd.mtd, offset, sizeof(u_int32_t), + ret = part->mbd.mtd->write(part->mbd.mtd, offset, sizeof(u_int32_t), &retlen, (u_char *)&ctl); if (ret) @@ -454,7 +454,7 @@ static int prepare_xfer(partition_t *part, int i) } xfer->state = XFER_PREPARED; return 0; - + } /* prepare_xfer */ /*====================================================================== @@ -466,7 +466,7 @@ static int prepare_xfer(partition_t *part, int i) All data blocks are copied to the corresponding blocks in the target unit, so the virtual block map does not need to be updated. - + ======================================================================*/ static int copy_erase_unit(partition_t *part, u_int16_t srcunit, @@ -486,14 +486,14 @@ static int copy_erase_unit(partition_t *part, u_int16_t srcunit, xfer = &part->XferInfo[xferunit]; DEBUG(2, "ftl_cs: copying block 0x%x to 0x%x\n", eun->Offset, xfer->Offset); - - + + /* Read current BAM */ if (part->bam_index != srcunit) { offset = eun->Offset + le32_to_cpu(part->header.BAMOffset); - ret = part->mbd.mtd->read(part->mbd.mtd, offset, + ret = part->mbd.mtd->read(part->mbd.mtd, offset, part->BlocksPerUnit * sizeof(u_int32_t), &retlen, (u_char *) (part->bam_cache)); @@ -501,11 +501,11 @@ static int copy_erase_unit(partition_t *part, u_int16_t srcunit, part->bam_index = 0xffff; if (ret) { - printk( KERN_WARNING "ftl: Failed to read BAM cache in copy_erase_unit()!\n"); + printk( KERN_WARNING "ftl: Failed to read BAM cache in copy_erase_unit()!\n"); return ret; } } - + /* Write the LogicalEUN for the transfer unit */ xfer->state = XFER_UNKNOWN; offset = xfer->Offset + 20; /* Bad! */ @@ -513,12 +513,12 @@ static int copy_erase_unit(partition_t *part, u_int16_t srcunit, ret = part->mbd.mtd->write(part->mbd.mtd, offset, sizeof(u_int16_t), &retlen, (u_char *) &unit); - + if (ret) { printk( KERN_WARNING "ftl: Failed to write back to BAM cache in copy_erase_unit()!\n"); return ret; } - + /* Copy all data blocks from source unit to transfer unit */ src = eun->Offset; dest = xfer->Offset; @@ -558,15 +558,15 @@ static int copy_erase_unit(partition_t *part, u_int16_t srcunit, } /* Write the BAM to the transfer unit */ - ret = part->mbd.mtd->write(part->mbd.mtd, xfer->Offset + le32_to_cpu(part->header.BAMOffset), - part->BlocksPerUnit * sizeof(int32_t), &retlen, + ret = part->mbd.mtd->write(part->mbd.mtd, xfer->Offset + le32_to_cpu(part->header.BAMOffset), + part->BlocksPerUnit * sizeof(int32_t), &retlen, (u_char *)part->bam_cache); if (ret) { printk( KERN_WARNING "ftl: Error writing BAM in copy_erase_unit\n"); return ret; } - + /* All clear? Then update the LogicalEUN again */ ret = part->mbd.mtd->write(part->mbd.mtd, xfer->Offset + 20, sizeof(u_int16_t), &retlen, (u_char *)&srcunitswap); @@ -574,9 +574,9 @@ static int copy_erase_unit(partition_t *part, u_int16_t srcunit, if (ret) { printk(KERN_WARNING "ftl: Error writing new LogicalEUN in copy_erase_unit\n"); return ret; - } - - + } + + /* Update the maps and usage stats*/ i = xfer->EraseCount; xfer->EraseCount = eun->EraseCount; @@ -588,10 +588,10 @@ static int copy_erase_unit(partition_t *part, u_int16_t srcunit, part->FreeTotal += free; eun->Free = free; eun->Deleted = 0; - + /* Now, the cache should be valid for the new block */ part->bam_index = srcunit; - + return 0; } /* copy_erase_unit */ @@ -608,7 +608,7 @@ static int copy_erase_unit(partition_t *part, u_int16_t srcunit, oldest data unit instead. This means that we generally postpone the next reclaimation as long as possible, but shuffle static stuff around a bit for wear leveling. - + ======================================================================*/ static int reclaim_block(partition_t *part) @@ -666,7 +666,7 @@ static int reclaim_block(partition_t *part) else DEBUG(1, "ftl_cs: reclaim failed: no " "suitable transfer units!\n"); - + return -EIO; } } @@ -715,7 +715,7 @@ static int reclaim_block(partition_t *part) returns the block index -- the erase unit is just the currently cached unit. If there are no free blocks, it returns 0 -- this is never a valid data block because it contains the header. - + ======================================================================*/ #ifdef PSYCHO_DEBUG @@ -737,7 +737,7 @@ static u_int32_t find_free(partition_t *part) u_int32_t blk; size_t retlen; int ret; - + /* Find an erase unit with some free space */ stop = (part->bam_index == 0xffff) ? 0 : part->bam_index; eun = stop; @@ -749,17 +749,17 @@ static u_int32_t find_free(partition_t *part) if (part->EUNInfo[eun].Free == 0) return 0; - + /* Is this unit's BAM cached? */ if (eun != part->bam_index) { /* Invalidate cache */ part->bam_index = 0xffff; - ret = part->mbd.mtd->read(part->mbd.mtd, + ret = part->mbd.mtd->read(part->mbd.mtd, part->EUNInfo[eun].Offset + le32_to_cpu(part->header.BAMOffset), part->BlocksPerUnit * sizeof(u_int32_t), &retlen, (u_char *) (part->bam_cache)); - + if (ret) { printk(KERN_WARNING"ftl: Error reading BAM in find_free\n"); return 0; @@ -781,14 +781,14 @@ static u_int32_t find_free(partition_t *part) } DEBUG(2, "ftl_cs: found free block at %d in %d\n", blk, eun); return blk; - + } /* find_free */ /*====================================================================== Read a series of sectors from an FTL partition. - + ======================================================================*/ static int ftl_read(partition_t *part, caddr_t buffer, @@ -798,7 +798,7 @@ static int ftl_read(partition_t *part, caddr_t buffer, u_long i; int ret; size_t offset, retlen; - + DEBUG(2, "ftl_cs: ftl_read(0x%p, 0x%lx, %ld)\n", part, sector, nblocks); if (!(part->state & FTL_FORMATTED)) { @@ -834,7 +834,7 @@ static int ftl_read(partition_t *part, caddr_t buffer, /*====================================================================== Write a series of sectors to an FTL partition - + ======================================================================*/ static int set_bam_entry(partition_t *part, u_int32_t log_addr, @@ -855,7 +855,7 @@ static int set_bam_entry(partition_t *part, u_int32_t log_addr, blk = (log_addr % bsize) / SECTOR_SIZE; offset = (part->EUNInfo[eun].Offset + blk * sizeof(u_int32_t) + le32_to_cpu(part->header.BAMOffset)); - + #ifdef PSYCHO_DEBUG ret = part->mbd.mtd->read(part->mbd.mtd, offset, sizeof(u_int32_t), &retlen, (u_char *)&old_addr); @@ -925,7 +925,7 @@ static int ftl_write(partition_t *part, caddr_t buffer, if (ret) return ret; } - + bsize = 1 << part->header.EraseUnitSize; virt_addr = sector * SECTOR_SIZE | BLOCK_DATA; @@ -949,12 +949,12 @@ static int ftl_write(partition_t *part, caddr_t buffer, log_addr = part->bam_index * bsize + blk * SECTOR_SIZE; part->EUNInfo[part->bam_index].Free--; part->FreeTotal--; - if (set_bam_entry(part, log_addr, 0xfffffffe)) + if (set_bam_entry(part, log_addr, 0xfffffffe)) return -EIO; part->EUNInfo[part->bam_index].Deleted++; offset = (part->EUNInfo[part->bam_index].Offset + blk * SECTOR_SIZE); - ret = part->mbd.mtd->write(part->mbd.mtd, offset, SECTOR_SIZE, &retlen, + ret = part->mbd.mtd->write(part->mbd.mtd, offset, SECTOR_SIZE, &retlen, buffer); if (ret) { @@ -964,7 +964,7 @@ static int ftl_write(partition_t *part, caddr_t buffer, offset); return -EIO; } - + /* Only delete the old entry when the new entry is ready */ old_addr = part->VirtualBlockMap[sector+i]; if (old_addr != 0xffffffff) { @@ -979,7 +979,7 @@ static int ftl_write(partition_t *part, caddr_t buffer, return -EIO; part->VirtualBlockMap[sector+i] = log_addr; part->EUNInfo[part->bam_index].Deleted--; - + buffer += SECTOR_SIZE; virt_addr += SECTOR_SIZE; } @@ -1034,20 +1034,20 @@ static void ftl_add_mtd(struct mtd_blktrans_ops *tr, struct mtd_info *mtd) partition_t *partition; partition = kmalloc(sizeof(partition_t), GFP_KERNEL); - + if (!partition) { printk(KERN_WARNING "No memory to scan for FTL on %s\n", mtd->name); return; - } + } memset(partition, 0, sizeof(partition_t)); partition->mbd.mtd = mtd; - if ((scan_header(partition) == 0) && + if ((scan_header(partition) == 0) && (build_maps(partition) == 0)) { - + partition->state = FTL_FORMATTED; #ifdef PCMCIA_DEBUG printk(KERN_INFO "ftl_cs: opening %d KiB FTL partition\n", @@ -1086,7 +1086,7 @@ struct mtd_blktrans_ops ftl_tr = { int init_ftl(void) { - DEBUG(0, "$Id: ftl.c,v 1.55 2005/01/17 13:47:21 hvr Exp $\n"); + DEBUG(0, "$Id: ftl.c,v 1.58 2005/11/07 11:14:19 gleixner Exp $\n"); return register_mtd_blktrans(&ftl_tr); } |