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kernel: mtk_bmt: add abstraction for supporting other formats
Preparation for supporting remapping on MT7621 Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau
parent
3c78fabb0d
commit
ff6b4f2cfb
@ -35,10 +35,15 @@
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#define BMT_TABLE_MAX (BB_TABLE_MAX * BBPOOL_RATIO / 100)
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#define BMT_TBL_DEF_VAL 0x0
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/*
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* Burner Bad Block Table
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* --------- Only support SLC Nand Chips!!!!!!!!!!! ----------
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*/
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struct mtk_bmt_ops {
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char *sig;
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unsigned int sig_len;
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int (*init)(struct device_node *np);
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bool (*remap_block)(u16 block, u16 mapped_block, int copy_len);
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void (*unmap_block)(u16 block);
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u16 (*get_mapping_block)(int block);
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int (*debug)(void *data, u64 val);
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};
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struct bbbt {
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char signature[3];
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@ -68,6 +73,8 @@ static struct bmt_desc {
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int (*_block_isbad) (struct mtd_info *mtd, loff_t ofs);
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int (*_block_markbad) (struct mtd_info *mtd, loff_t ofs);
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const struct mtk_bmt_ops *ops;
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struct bbbt *bbt;
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struct dentry *debugfs_dir;
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@ -198,8 +205,8 @@ static int write_bmt(u16 block, unsigned char *dat)
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struct mtd_oob_ops ops = {
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.mode = MTD_OPS_PLACE_OOB,
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.ooboffs = OOB_SIGNATURE_OFFSET + bmtd.oob_offset,
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.oobbuf = "bmt",
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.ooblen = 3,
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.oobbuf = bmtd.ops->sig,
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.ooblen = bmtd.ops->sig_len,
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.datbuf = dat,
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.len = bmtd.bmt_pgs << bmtd.pg_shift,
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};
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@ -438,7 +445,7 @@ error:
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/* We met a bad block, mark it as bad and map it to a valid block in pool,
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* if it's a write failure, we need to write the data to mapped block
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*/
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static bool update_bmt(u16 block, int copy_len)
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static bool remap_block_v2(u16 block, u16 mapped_block, int copy_len)
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{
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u16 mapped_blk;
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struct bbbt *bbt;
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@ -478,7 +485,8 @@ mapping_block_in_range(int block)
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return false;
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}
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u16 get_mapping_block_index(int block)
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static u16
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get_mapping_block_index_v2(int block)
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{
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if (block >= bmtd.pool_lba)
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return block;
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@ -498,6 +506,7 @@ mtk_bmt_read(struct mtd_info *mtd, loff_t from,
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loff_t cur_from;
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int ret = 0;
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int max_bitflips = 0;
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int start, end;
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ops->retlen = 0;
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ops->oobretlen = 0;
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@ -509,7 +518,7 @@ mtk_bmt_read(struct mtd_info *mtd, loff_t from,
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u32 block = from >> bmtd.blk_shift;
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u32 cur_block;
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cur_block = get_mapping_block_index(block);
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cur_block = bmtd.ops->get_mapping_block(block);
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cur_from = ((loff_t)cur_block << bmtd.blk_shift) + offset;
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cur_ops.oobretlen = 0;
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@ -522,7 +531,7 @@ mtk_bmt_read(struct mtd_info *mtd, loff_t from,
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else
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max_bitflips = max_t(int, max_bitflips, cur_ret);
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if (cur_ret < 0 && !mtd_is_bitflip(cur_ret)) {
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update_bmt(block, mtd->erasesize);
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bmtd.ops->remap_block(block, cur_block, mtd->erasesize);
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if (retry_count++ < 10)
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continue;
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@ -530,8 +539,8 @@ mtk_bmt_read(struct mtd_info *mtd, loff_t from,
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}
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if (cur_ret >= mtd->bitflip_threshold &&
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mapping_block_in_range(block))
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update_bmt(block, mtd->erasesize);
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mapping_block_in_range(block, &start, &end))
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bmtd.ops->remap_block(block, cur_block, mtd->erasesize);
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ops->retlen += cur_ops.retlen;
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ops->oobretlen += cur_ops.oobretlen;
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@ -572,7 +581,7 @@ mtk_bmt_write(struct mtd_info *mtd, loff_t to,
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u32 block = to >> bmtd.blk_shift;
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u32 cur_block;
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cur_block = get_mapping_block_index(block);
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cur_block = bmtd.ops->get_mapping_block(block);
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cur_to = ((loff_t)cur_block << bmtd.blk_shift) + offset;
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cur_ops.oobretlen = 0;
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@ -581,7 +590,7 @@ mtk_bmt_write(struct mtd_info *mtd, loff_t to,
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ops->len - ops->retlen);
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ret = bmtd._write_oob(mtd, cur_to, &cur_ops);
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if (ret < 0) {
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update_bmt(block, offset);
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bmtd.ops->remap_block(block, cur_block, offset);
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if (retry_count++ < 10)
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continue;
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@ -622,11 +631,11 @@ mtk_bmt_mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
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while (start_addr < end_addr) {
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orig_block = start_addr >> bmtd.blk_shift;
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block = get_mapping_block_index(orig_block);
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block = bmtd.ops->get_mapping_block(orig_block);
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mapped_instr.addr = (loff_t)block << bmtd.blk_shift;
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ret = bmtd._erase(mtd, &mapped_instr);
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if (ret) {
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update_bmt(orig_block, 0);
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bmtd.ops->remap_block(orig_block, block, 0);
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if (retry_count++ < 10)
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continue;
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instr->fail_addr = start_addr;
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@ -647,10 +656,10 @@ mtk_bmt_block_isbad(struct mtd_info *mtd, loff_t ofs)
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int ret;
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retry:
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block = get_mapping_block_index(orig_block);
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block = bmtd.ops->get_mapping_block(orig_block);
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ret = bmtd._block_isbad(mtd, (loff_t)block << bmtd.blk_shift);
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if (ret) {
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update_bmt(orig_block, bmtd.blk_size);
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bmtd.ops->remap_block(orig_block, block, bmtd.blk_size);
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if (retry_count++ < 10)
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goto retry;
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}
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@ -661,8 +670,10 @@ static int
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mtk_bmt_block_markbad(struct mtd_info *mtd, loff_t ofs)
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{
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u16 orig_block = ofs >> bmtd.blk_shift;
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u16 block = get_mapping_block_index(orig_block);
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update_bmt(orig_block, bmtd.blk_size);
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u16 block = bmtd.ops->get_mapping_block(orig_block);
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bmtd.ops->remap_block(orig_block, block, bmtd.blk_size);
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return bmtd._block_markbad(mtd, (loff_t)block << bmtd.blk_shift);
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}
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@ -682,12 +693,16 @@ mtk_bmt_replace_ops(struct mtd_info *mtd)
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mtd->_block_markbad = mtk_bmt_block_markbad;
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}
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static int mtk_bmt_debug_mark_good(void *data, u64 val)
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static void
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unmap_block_v2(u16 block)
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{
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u32 block = val >> bmtd.blk_shift;
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bmtd.bbt->bb_tbl[block] = block;
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bmtd.bmt_blk_idx = upload_bmt(bmtd.bbt, bmtd.bmt_blk_idx);
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}
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static int mtk_bmt_debug_mark_good(void *data, u64 val)
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{
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bmtd.ops->unmap_block(val >> bmtd.blk_shift);
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return 0;
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}
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@ -695,8 +710,9 @@ static int mtk_bmt_debug_mark_good(void *data, u64 val)
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static int mtk_bmt_debug_mark_bad(void *data, u64 val)
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{
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u32 block = val >> bmtd.blk_shift;
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u16 cur_block = bmtd.ops->get_mapping_block(block);
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update_bmt(block, bmtd.blk_size);
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bmtd.ops->remap_block(block, cur_block, bmtd.blk_size);
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return 0;
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}
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@ -729,7 +745,7 @@ mtk_bmt_get_mapping_mask(void)
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return used;
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}
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static int mtk_bmt_debug(void *data, u64 val)
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static int mtk_bmt_debug_v2(void *data, u64 val)
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{
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struct bbmt *bbmt = bmt_tbl(bmtd.bbt);
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struct mtd_info *mtd = bmtd.mtd;
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@ -794,6 +810,11 @@ static int mtk_bmt_debug(void *data, u64 val)
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return 0;
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}
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static int mtk_bmt_debug(void *data, u64 val)
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{
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return bmtd.ops->debug(data, val);
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}
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DEFINE_DEBUGFS_ATTRIBUTE(fops_mark_good, NULL, mtk_bmt_debug_mark_good, "%llu\n");
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DEFINE_DEBUGFS_ATTRIBUTE(fops_mark_bad, NULL, mtk_bmt_debug_mark_bad, "%llu\n");
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@ -835,26 +856,11 @@ void mtk_bmt_detach(struct mtd_info *mtd)
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memset(&bmtd, 0, sizeof(bmtd));
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}
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/* total_blocks - The total count of blocks that the Nand Chip has */
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int mtk_bmt_attach(struct mtd_info *mtd)
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static int mtk_bmt_init_v2(struct device_node *np)
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{
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struct device_node *np;
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struct bbbt *bbt;
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u32 bufsz;
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u32 block;
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u16 total_blocks, pmt_block;
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int ret = 0;
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u32 bmt_pool_size, bmt_table_size;
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if (bmtd.mtd)
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return -ENOSPC;
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np = mtd_get_of_node(mtd);
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if (!np)
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return 0;
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if (!of_property_read_bool(np, "mediatek,bmt-v2"))
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return 0;
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u32 bufsz, block;
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u16 pmt_block;
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if (of_property_read_u32(np, "mediatek,bmt-pool-size",
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&bmt_pool_size) != 0)
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@ -868,22 +874,11 @@ int mtk_bmt_attach(struct mtd_info *mtd)
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&bmt_table_size) != 0)
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bmt_table_size = 0x2000U;
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bmtd.remap_range = of_get_property(np, "mediatek,bmt-remap-range",
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&bmtd.remap_range_len);
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bmtd.remap_range_len /= 8;
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bmtd.mtd = mtd;
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mtk_bmt_replace_ops(mtd);
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bmtd.table_size = bmt_table_size;
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bmtd.blk_size = mtd->erasesize;
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bmtd.blk_shift = ffs(bmtd.blk_size) - 1;
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bmtd.pg_size = mtd->writesize;
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bmtd.pg_shift = ffs(bmtd.pg_size) - 1;
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total_blocks = mtd->size >> bmtd.blk_shift;
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pmt_block = total_blocks - bmt_pool_size - 2;
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mtd->size = pmt_block << bmtd.blk_shift;
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pmt_block = bmtd.total_blks - bmt_pool_size - 2;
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bmtd.mtd->size = pmt_block << bmtd.blk_shift;
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/*
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* ---------------------------------------
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@ -899,66 +894,103 @@ int mtk_bmt_attach(struct mtd_info *mtd)
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*/
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bmtd.pool_lba = (u16)(pmt_block + 2);
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bmtd.total_blks = total_blocks;
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bmtd.bb_max = bmtd.total_blks * BBPOOL_RATIO / 100;
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/* 3 buffers we need */
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bufsz = round_up(sizeof(struct bbbt) +
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bmt_table_size * sizeof(struct bbmt), bmtd.pg_size);
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bmtd.bmt_pgs = bufsz >> bmtd.pg_shift;
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nand_bbt_buf = kzalloc(bufsz, GFP_KERNEL);
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nand_data_buf = kzalloc(bmtd.pg_size, GFP_KERNEL);
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if (!nand_bbt_buf)
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return -ENOMEM;
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if (!nand_bbt_buf || !nand_data_buf) {
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memset(nand_bbt_buf, 0xff, bufsz);
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/* Scanning start from the first page of the last block
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* of whole flash
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*/
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bmtd.bbt = scan_bmt(bmtd.total_blks - 1);
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if (!bmtd.bbt) {
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/* BMT not found */
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if (bmtd.total_blks > BB_TABLE_MAX + BMT_TABLE_MAX) {
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pr_info("nand: FATAL: Too many blocks, can not support!\n");
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return -1;
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}
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bmtd.bbt = (struct bbbt *)nand_bbt_buf;
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memset(bmt_tbl(bmtd.bbt), BMT_TBL_DEF_VAL,
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bmtd.table_size * sizeof(struct bbmt));
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if (scan_bad_blocks(bmtd.bbt))
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return -1;
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/* BMT always in the last valid block in pool */
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bmtd.bmt_blk_idx = upload_bmt(bmtd.bbt, bmtd.bmt_blk_idx);
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block = bmt_tbl(bmtd.bbt)[bmtd.bmt_blk_idx].block;
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pr_notice("[BBT] BMT.v2 is written into PBA:0x%x\n", block);
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if (bmtd.bmt_blk_idx == 0)
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pr_info("nand: Warning: no available block in BMT pool!\n");
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else if (bmtd.bmt_blk_idx == (u16)-1)
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return -1;
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}
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return 0;
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}
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int mtk_bmt_attach(struct mtd_info *mtd)
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{
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static const struct mtk_bmt_ops v2_ops = {
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.sig = "bmt",
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.sig_len = 3,
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.init = mtk_bmt_init_v2,
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.remap_block = remap_block_v2,
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.unmap_block = unmap_block_v2,
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.get_mapping_block = get_mapping_block_index_v2,
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.debug = mtk_bmt_debug_v2,
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};
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struct device_node *np;
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int ret = 0;
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if (bmtd.mtd)
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return -ENOSPC;
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np = mtd_get_of_node(mtd);
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if (!np)
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return 0;
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if (of_property_read_bool(np, "mediatek,bmt-v2"))
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bmtd.ops = &v2_ops;
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else
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return 0;
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bmtd.remap_range = of_get_property(np, "mediatek,bmt-remap-range",
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&bmtd.remap_range_len);
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bmtd.remap_range_len /= 8;
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bmtd.mtd = mtd;
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mtk_bmt_replace_ops(mtd);
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bmtd.blk_size = mtd->erasesize;
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bmtd.blk_shift = ffs(bmtd.blk_size) - 1;
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bmtd.pg_size = mtd->writesize;
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bmtd.pg_shift = ffs(bmtd.pg_size) - 1;
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bmtd.total_blks = mtd->size >> bmtd.blk_shift;
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nand_data_buf = kzalloc(bmtd.pg_size, GFP_KERNEL);
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if (!nand_data_buf) {
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pr_info("nand: FATAL ERR: allocate buffer failed!\n");
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ret = -1;
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goto error;
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}
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memset(nand_bbt_buf, 0xff, bufsz);
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memset(nand_data_buf, 0xff, bmtd.pg_size);
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BBT_LOG("bbtbuf=0x%p(0x%x) dat=0x%p(0x%x)",
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nand_bbt_buf, bufsz, nand_data_buf, bmtd.pg_size);
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BBT_LOG("pool_lba=0x%x total_blks=0x%x bb_max=0x%x",
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bmtd.pool_lba, bmtd.total_blks, bmtd.bb_max);
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/* Scanning start from the first page of the last block
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* of whole flash
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*/
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bbt = scan_bmt(bmtd.total_blks - 1);
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if (!bbt) {
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/* BMT not found */
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if (bmtd.total_blks > BB_TABLE_MAX + BMT_TABLE_MAX) {
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pr_info("nand: FATAL: Too many blocks, can not support!\n");
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ret = -1;
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ret = bmtd.ops->init(np);
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if (ret)
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goto error;
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}
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bbt = (struct bbbt *)nand_bbt_buf;
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memset(bmt_tbl(bbt), BMT_TBL_DEF_VAL, bmtd.table_size * sizeof(struct bbmt));
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if (scan_bad_blocks(bbt)) {
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ret = -1;
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goto error;
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}
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/* BMT always in the last valid block in pool */
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bmtd.bmt_blk_idx = upload_bmt(bbt, bmtd.bmt_blk_idx);
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block = bmt_tbl(bbt)[bmtd.bmt_blk_idx].block;
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pr_notice("[BBT] BMT.v2 is written into PBA:0x%x\n", block);
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if (bmtd.bmt_blk_idx == 0)
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pr_info("nand: Warning: no available block in BMT pool!\n");
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else if (bmtd.bmt_blk_idx == (u16)-1) {
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ret = -1;
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goto error;
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}
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}
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mtk_bmt_add_debugfs();
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bmtd.bbt = bbt;
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return 0;
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error:
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