2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
4 * Copyright (C) 2002-2018 Aleph One Ltd.
6 * Created by Charles Manning <charles@aleph1.co.uk>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
12 * This file handles the marshalling (ie internal<-->external structure
13 * translation between the internal tags and the stored tags in Yaffs2-style
17 #include "yaffs_tagsmarshall.h"
18 #include "yaffs_trace.h"
19 #include "yaffs_packedtags2.h"
21 static int yaffs_tags_marshall_write(struct yaffs_dev *dev,
22 int nand_chunk, const u8 *data,
23 const struct yaffs_ext_tags *tags)
25 struct yaffs_packed_tags2 pt;
28 int packed_tags_size =
29 dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
30 void *packed_tags_ptr =
31 dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
33 yaffs_trace(YAFFS_TRACE_MTD,
34 "yaffs_tags_marshall_write chunk %d data %p tags %p",
35 nand_chunk, data, tags);
37 /* For yaffs2 writing there must be both data and tags.
38 * If we're using inband tags, then the tags are stuffed into
39 * the end of the data buffer.
43 else if (dev->param.inband_tags) {
44 struct yaffs_packed_tags2_tags_only *pt2tp;
46 (struct yaffs_packed_tags2_tags_only *)(data +
48 data_bytes_per_chunk);
49 yaffs_pack_tags2_tags_only(dev, pt2tp, tags);
51 yaffs_pack_tags2(dev, &pt, tags, !dev->param.no_tags_ecc);
54 retval = dev->drv.drv_write_chunk_fn(dev, nand_chunk,
55 data, dev->param.total_bytes_per_chunk,
56 (dev->param.inband_tags) ? NULL : packed_tags_ptr,
57 (dev->param.inband_tags) ? 0 : packed_tags_size);
62 static int yaffs_tags_marshall_read(struct yaffs_dev *dev,
63 int nand_chunk, u8 *data,
64 struct yaffs_ext_tags *tags)
69 enum yaffs_ecc_result ecc_result;
71 struct yaffs_packed_tags2 pt;
73 int packed_tags_size =
74 dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
75 void *packed_tags_ptr =
76 dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
78 yaffs_trace(YAFFS_TRACE_MTD,
79 "yaffs_tags_marshall_read chunk %d data %p tags %p",
80 nand_chunk, data, tags);
82 if (dev->param.inband_tags) {
85 data = yaffs_get_temp_buffer(dev);
89 if (dev->param.inband_tags || (data && !tags))
90 retval = dev->drv.drv_read_chunk_fn(dev, nand_chunk,
91 data, dev->param.total_bytes_per_chunk,
95 retval = dev->drv.drv_read_chunk_fn(dev, nand_chunk,
96 data, dev->param.total_bytes_per_chunk,
97 spare_buffer, packed_tags_size,
103 if (retval == YAFFS_FAIL)
106 if (dev->param.inband_tags) {
108 struct yaffs_packed_tags2_tags_only *pt2tp;
110 (struct yaffs_packed_tags2_tags_only *)
111 &data[dev->data_bytes_per_chunk];
112 yaffs_unpack_tags2_tags_only(dev, tags, pt2tp);
115 memcpy(packed_tags_ptr, spare_buffer, packed_tags_size);
116 yaffs_unpack_tags2(dev, tags, &pt, !dev->param.no_tags_ecc);
120 yaffs_release_temp_buffer(dev, data);
122 if (tags && ecc_result == YAFFS_ECC_RESULT_UNFIXED) {
123 tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED;
124 dev->n_ecc_unfixed++;
127 if (tags && ecc_result == YAFFS_ECC_RESULT_FIXED) {
128 if (tags->ecc_result <= YAFFS_ECC_RESULT_NO_ERROR)
129 tags->ecc_result = YAFFS_ECC_RESULT_FIXED;
133 if (ecc_result < YAFFS_ECC_RESULT_UNFIXED)
139 static int yaffs_tags_marshall_query_block(struct yaffs_dev *dev, int block_no,
140 enum yaffs_block_state *state,
145 yaffs_trace(YAFFS_TRACE_MTD, "yaffs_tags_marshall_query_block %d",
148 retval = dev->drv.drv_check_bad_fn(dev, block_no);
150 if (retval== YAFFS_FAIL) {
151 yaffs_trace(YAFFS_TRACE_MTD, "block is bad");
153 *state = YAFFS_BLOCK_STATE_DEAD;
156 struct yaffs_ext_tags t;
158 yaffs_tags_marshall_read(dev,
159 block_no * dev->param.chunks_per_block,
163 *seq_number = t.seq_number;
164 *state = YAFFS_BLOCK_STATE_NEEDS_SCAN;
167 *state = YAFFS_BLOCK_STATE_EMPTY;
171 yaffs_trace(YAFFS_TRACE_MTD,
172 "block query returns seq %d state %d",
173 *seq_number, *state);
178 static int yaffs_tags_marshall_mark_bad(struct yaffs_dev *dev, int block_no)
180 return dev->drv.drv_mark_bad_fn(dev, block_no);
185 void yaffs_tags_marshall_install(struct yaffs_dev *dev)
187 if (!dev->param.is_yaffs2)
190 if (!dev->tagger.write_chunk_tags_fn)
191 dev->tagger.write_chunk_tags_fn = yaffs_tags_marshall_write;
193 if (!dev->tagger.read_chunk_tags_fn)
194 dev->tagger.read_chunk_tags_fn = yaffs_tags_marshall_read;
196 if (!dev->tagger.query_block_fn)
197 dev->tagger.query_block_fn = yaffs_tags_marshall_query_block;
199 if (!dev->tagger.mark_bad_fn)
200 dev->tagger.mark_bad_fn = yaffs_tags_marshall_mark_bad;