2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
4 * Copyright (C) 2002-2011 Aleph One Ltd.
5 * for Toby Churchill Ltd and Brightstar Engineering
7 * Created by Charles Manning <charles@aleph1.co.uk>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include "yaffs_guts.h"
15 #include "yaffs_trace.h"
16 #include "yaffs_packedtags2.h"
18 static int yaffs_tags_marshall_write(struct yaffs_dev *dev,
19 int nand_chunk, const u8 *data,
20 const struct yaffs_ext_tags *tags)
22 struct yaffs_packed_tags2 pt;
25 int packed_tags_size =
26 dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
27 void *packed_tags_ptr =
28 dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
30 yaffs_trace(YAFFS_TRACE_MTD,
31 "yaffs_tags_marshall_write chunk %d data %p tags %p",
32 nand_chunk, data, tags);
34 /* For yaffs2 writing there must be both data and tags.
35 * If we're using inband tags, then the tags are stuffed into
36 * the end of the data buffer.
40 else if (dev->param.inband_tags) {
41 struct yaffs_packed_tags2_tags_only *pt2tp;
43 (struct yaffs_packed_tags2_tags_only *)(data +
45 data_bytes_per_chunk);
46 yaffs_pack_tags2_tags_only(pt2tp, tags);
48 yaffs_pack_tags2(&pt, tags, !dev->param.no_tags_ecc);
51 retval = dev->drv.drv_write_chunk_fn(dev, nand_chunk,
52 data, dev->param.total_bytes_per_chunk,
53 (dev->param.inband_tags) ? NULL : packed_tags_ptr,
54 (dev->param.inband_tags) ? 0 : packed_tags_size);
59 static int yaffs_tags_marshall_read(struct yaffs_dev *dev,
60 int nand_chunk, u8 *data,
61 struct yaffs_ext_tags *tags)
66 enum yaffs_ecc_result ecc_result;
68 struct yaffs_packed_tags2 pt;
70 int packed_tags_size =
71 dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
72 void *packed_tags_ptr =
73 dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
75 yaffs_trace(YAFFS_TRACE_MTD,
76 "yaffs_tags_marshall_read chunk %d data %p tags %p",
77 nand_chunk, data, tags);
79 if (dev->param.inband_tags) {
82 data = yaffs_get_temp_buffer(dev);
86 if (dev->param.inband_tags || (data && !tags))
87 retval = dev->drv.drv_read_chunk_fn(dev, nand_chunk,
88 data, dev->param.total_bytes_per_chunk,
92 retval = dev->drv.drv_read_chunk_fn(dev, nand_chunk,
93 data, dev->param.total_bytes_per_chunk,
94 spare_buffer, packed_tags_size,
100 if (dev->param.inband_tags) {
102 struct yaffs_packed_tags2_tags_only *pt2tp;
104 (struct yaffs_packed_tags2_tags_only *)
105 &data[dev->data_bytes_per_chunk];
106 yaffs_unpack_tags2_tags_only(tags, pt2tp);
109 memcpy(packed_tags_ptr, spare_buffer, packed_tags_size);
110 yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc);
114 yaffs_release_temp_buffer(dev, data);
116 if (tags && ecc_result == YAFFS_ECC_RESULT_UNFIXED) {
117 tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED;
118 dev->n_ecc_unfixed++;
121 if (tags && ecc_result == -YAFFS_ECC_RESULT_FIXED) {
122 if (tags->ecc_result <= YAFFS_ECC_RESULT_NO_ERROR)
123 tags->ecc_result = YAFFS_ECC_RESULT_FIXED;
127 if (ecc_result < YAFFS_ECC_RESULT_UNFIXED)
133 static int yaffs_tags_marshall_query_block(struct yaffs_dev *dev, int block_no,
134 enum yaffs_block_state *state,
139 yaffs_trace(YAFFS_TRACE_MTD, "yaffs_tags_marshall_query_block %d",
142 retval = dev->drv.drv_check_bad_fn(dev, block_no);
144 if (retval== YAFFS_FAIL) {
145 yaffs_trace(YAFFS_TRACE_MTD, "block is bad");
147 *state = YAFFS_BLOCK_STATE_DEAD;
150 struct yaffs_ext_tags t;
152 yaffs_tags_marshall_read(dev,
153 block_no * dev->param.chunks_per_block,
157 *seq_number = t.seq_number;
158 *state = YAFFS_BLOCK_STATE_NEEDS_SCAN;
161 *state = YAFFS_BLOCK_STATE_EMPTY;
165 yaffs_trace(YAFFS_TRACE_MTD,
166 "block query returns seq %d state %d",
167 *seq_number, *state);
175 static int yaffs_tags_marshall_mark_bad(struct yaffs_dev *dev, int block_no)
177 return dev->drv.drv_mark_bad_fn(dev, block_no);
182 void yaffs_tags_marshall_install(struct yaffs_dev *dev)
184 if (!dev->param.is_yaffs2)
187 if (!dev->tagger.write_chunk_tags_fn)
188 dev->tagger.write_chunk_tags_fn = yaffs_tags_marshall_write;
190 if (!dev->tagger.read_chunk_tags_fn)
191 dev->tagger.read_chunk_tags_fn = yaffs_tags_marshall_read;
193 if (!dev->tagger.query_block_fn)
194 dev->tagger.query_block_fn = yaffs_tags_marshall_query_block;
196 if (!dev->tagger.mark_bad_fn)
197 dev->tagger.mark_bad_fn = yaffs_tags_marshall_mark_bad;