/* * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. * * Copyright (C) 2002-2011 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * * Created by Charles Manning * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ /* mtd interface for YAFFS2 */ #include "yportenv.h" #include "yaffs_trace.h" #include "yaffs_mtdif2.h" #include "linux/mtd/mtd.h" #include "linux/types.h" #include "linux/time.h" #include "yaffs_packedtags2.h" #include "yaffs_linux.h" #if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0)) #define MTD_OPS_AUTO_OOB MTD_OOB_AUTO #endif /* NB For use with inband tags.... * We assume that the data buffer is of size total_bytes_per_chunk so * that we can also use it to load the tags. */ int nandmtd2_write_chunk_tags(struct yaffs_dev *dev, int nand_chunk, const u8 *data, const struct yaffs_ext_tags *tags) { struct mtd_info *mtd = yaffs_dev_to_mtd(dev); #if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17)) struct mtd_oob_ops ops; #else size_t dummy; #endif int retval = 0; loff_t addr; struct yaffs_packed_tags2 pt; int packed_tags_size = dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt); void *packed_tags_ptr = dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt; yaffs_trace(YAFFS_TRACE_MTD, "nandmtd2_write_chunk_tags chunk %d data %p tags %p", nand_chunk, data, tags); addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk; /* For yaffs2 writing there must be both data and tags. * If we're using inband tags, then the tags are stuffed into * the end of the data buffer. */ if (!data || !tags) BUG(); else if (dev->param.inband_tags) { struct yaffs_packed_tags2_tags_only *pt2tp; pt2tp = (struct yaffs_packed_tags2_tags_only *)(data + dev-> data_bytes_per_chunk); yaffs_pack_tags2_tags_only(pt2tp, tags); } else { yaffs_pack_tags2(&pt, tags, !dev->param.no_tags_ecc); } #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) ops.mode = MTD_OPS_AUTO_OOB; ops.ooblen = (dev->param.inband_tags) ? 0 : packed_tags_size; ops.len = dev->param.total_bytes_per_chunk; ops.ooboffs = 0; ops.datbuf = (u8 *) data; ops.oobbuf = (dev->param.inband_tags) ? NULL : packed_tags_ptr; retval = mtd->_write_oob(mtd, addr, &ops); #else if (!dev->param.inband_tags) { retval = mtd->write_ecc(mtd, addr, dev->data_bytes_per_chunk, &dummy, data, (u8 *) packed_tags_ptr, NULL); } else { retval = mtd->write(mtd, addr, dev->param.total_bytes_per_chunk, &dummy, data); } #endif if (retval == 0) return YAFFS_OK; else return YAFFS_FAIL; } int nandmtd2_read_chunk_tags(struct yaffs_dev *dev, int nand_chunk, u8 *data, struct yaffs_ext_tags *tags) { struct mtd_info *mtd = yaffs_dev_to_mtd(dev); #if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17)) struct mtd_oob_ops ops; #endif size_t dummy; int retval = 0; int local_data = 0; loff_t addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk; struct yaffs_packed_tags2 pt; int packed_tags_size = dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt); void *packed_tags_ptr = dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt; yaffs_trace(YAFFS_TRACE_MTD, "nandmtd2_read_chunk_tags chunk %d data %p tags %p", nand_chunk, data, tags); if (dev->param.inband_tags) { if (!data) { local_data = 1; data = yaffs_get_temp_buffer(dev); } } #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) if (dev->param.inband_tags || (data && !tags)) retval = mtd->_read(mtd, addr, dev->param.total_bytes_per_chunk, &dummy, data); else if (tags) { ops.mode = MTD_OPS_AUTO_OOB; ops.ooblen = packed_tags_size; ops.len = data ? dev->data_bytes_per_chunk : packed_tags_size; ops.ooboffs = 0; ops.datbuf = data; ops.oobbuf = yaffs_dev_to_lc(dev)->spare_buffer; retval = mtd->_read_oob(mtd, addr, &ops); } #else if (!dev->param.inband_tags && data && tags) { retval = mtd->read_ecc(mtd, addr, dev->data_bytes_per_chunk, &dummy, data, dev->spare_buffer, NULL); } else { if (data) retval = mtd->read(mtd, addr, dev->data_bytes_per_chunk, &dummy, data); if (!dev->param.inband_tags && tags) retval = mtd->read_oob(mtd, addr, mtd->oobsize, &dummy, dev->spare_buffer); } #endif if (dev->param.inband_tags) { if (tags) { struct yaffs_packed_tags2_tags_only *pt2tp; pt2tp = (struct yaffs_packed_tags2_tags_only *) &data[dev->data_bytes_per_chunk]; yaffs_unpack_tags2_tags_only(tags, pt2tp); } } else { if (tags) { memcpy(packed_tags_ptr, yaffs_dev_to_lc(dev)->spare_buffer, packed_tags_size); yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc); } } if (local_data) yaffs_release_temp_buffer(dev, data); if (tags && retval == -EBADMSG && tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) { tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED; dev->n_ecc_unfixed++; } if (tags && retval == -EUCLEAN && tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) { tags->ecc_result = YAFFS_ECC_RESULT_FIXED; dev->n_ecc_fixed++; } if (tags && retval == -NEED_REPLACEMENT) { tags->ecc_result = YAFFS_ECC_RESULT_REPLACED; retval = 0; } if (retval == 0) return YAFFS_OK; else return YAFFS_FAIL; } int nandmtd2_mark_block_bad(struct yaffs_dev *dev, int block_no) { struct mtd_info *mtd = yaffs_dev_to_mtd(dev); int retval; yaffs_trace(YAFFS_TRACE_MTD, "nandmtd2_mark_block_bad %d", block_no); retval = mtd->_block_markbad(mtd, ((loff_t)block_no) * dev->param.chunks_per_block * dev->param.total_bytes_per_chunk); if (retval == 0) return YAFFS_OK; else return YAFFS_FAIL; } int nandmtd2_query_block(struct yaffs_dev *dev, int block_no, enum yaffs_block_state *state, u32 *seq_number) { struct mtd_info *mtd = yaffs_dev_to_mtd(dev); int retval; yaffs_trace(YAFFS_TRACE_MTD, "nandmtd2_query_block %d", block_no); retval = mtd->_block_isbad(mtd, ((loff_t)block_no) * dev->param.chunks_per_block * dev->param.total_bytes_per_chunk); if (retval) { yaffs_trace(YAFFS_TRACE_MTD, "block is bad"); *state = YAFFS_BLOCK_STATE_DEAD; *seq_number = 0; } else { struct yaffs_ext_tags t; nandmtd2_read_chunk_tags(dev, block_no * dev->param.chunks_per_block, NULL, &t); if (t.chunk_used) { *seq_number = t.seq_number; *state = YAFFS_BLOCK_STATE_NEEDS_SCAN; } else { *seq_number = 0; *state = YAFFS_BLOCK_STATE_EMPTY; } } yaffs_trace(YAFFS_TRACE_MTD, "block is bad seq %d state %d", *seq_number, *state); if (retval == 0) return YAFFS_OK; else return YAFFS_FAIL; }