[PATCH v2 08/12] mtd: nand_bbt: remove struct nand_chip from nand_bbt.c
From: Peter Pan
Date: Tue Dec 15 2015 - 01:00:56 EST
From: Brian Norris <computersforpeace@xxxxxxxxx>
This commit contains most of modification. But the job is quite
simple --- replace struct nand_chip with struct nand_bbt. There
is no algorithm change, just replacement.
Signed-off-by: Brian Norris <computersforpeace@xxxxxxxxx>
Signed-off-by: Peter Pan <peterpandong@xxxxxxxxxx>
---
drivers/mtd/nand/nand_bbt.c | 391 ++++++++++++++++++++++----------------------
1 file changed, 193 insertions(+), 198 deletions(-)
diff --git a/drivers/mtd/nand/nand_bbt.c b/drivers/mtd/nand/nand_bbt.c
index a5c8ab5..b46b4ae 100644
--- a/drivers/mtd/nand/nand_bbt.c
+++ b/drivers/mtd/nand/nand_bbt.c
@@ -60,8 +60,7 @@
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/mtd/mtd.h>
-#include <linux/mtd/bbm.h>
-#include <linux/mtd/nand.h>
+#include <linux/mtd/nand_bbt.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/vmalloc.h>
@@ -76,20 +75,20 @@
#define BBT_ENTRY_MASK 0x03
#define BBT_ENTRY_SHIFT 2
-static int nand_update_bbt(struct mtd_info *mtd, loff_t offs);
+static int nand_update_bbt(struct nand_bbt *bbt, loff_t offs);
-static inline uint8_t bbt_get_entry(struct nand_chip *chip, int block)
+static inline uint8_t bbt_get_entry(struct nand_bbt *bbt, int block)
{
- uint8_t entry = chip->bbt[block >> BBT_ENTRY_SHIFT];
+ uint8_t entry = bbt->bbt[block >> BBT_ENTRY_SHIFT];
entry >>= (block & BBT_ENTRY_MASK) * 2;
return entry & BBT_ENTRY_MASK;
}
-static inline void bbt_mark_entry(struct nand_chip *chip, int block,
+static inline void bbt_mark_entry(struct nand_bbt *bbt, int block,
uint8_t mark)
{
uint8_t msk = (mark & BBT_ENTRY_MASK) << ((block & BBT_ENTRY_MASK) * 2);
- chip->bbt[block >> BBT_ENTRY_SHIFT] |= msk;
+ bbt->bbt[block >> BBT_ENTRY_SHIFT] |= msk;
}
static int check_pattern_no_oob(uint8_t *buf, struct nand_bbt_descr *td)
@@ -142,7 +141,7 @@ static u32 add_marker_len(struct nand_bbt_descr *td)
/**
* read_bbt - [GENERIC] Read the bad block table starting from page
- * @mtd: MTD device structure
+ * @bbt: NAND BBT structure
* @buf: temporary buffer
* @page: the starting page
* @num: the number of bbt descriptors to read
@@ -151,11 +150,11 @@ static u32 add_marker_len(struct nand_bbt_descr *td)
*
* Read the bad block table starting from page.
*/
-static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,
+static int read_bbt(struct nand_bbt *bbt, uint8_t *buf, int page, int num,
struct nand_bbt_descr *td, int offs)
{
+ struct mtd_info *mtd = bbt->mtd;
int res, ret = 0, i, j, act = 0;
- struct nand_chip *this = mtd_to_nand(mtd);
size_t retlen, len, totlen;
loff_t from;
int bits = td->options & NAND_BBT_NRBITS_MSK;
@@ -165,10 +164,10 @@ static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,
totlen = (num * bits) >> 3;
marker_len = add_marker_len(td);
- from = ((loff_t)page) << this->page_shift;
+ from = ((loff_t)page) << bbt->page_shift;
while (totlen) {
- len = min(totlen, (size_t)(1 << this->bbt_erase_shift));
+ len = min(totlen, (size_t)(1 << bbt->bbt_erase_shift));
if (marker_len) {
/*
* In case the BBT marker is not in the OOB area it
@@ -204,8 +203,8 @@ static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,
if (reserved_block_code && (tmp == reserved_block_code)) {
pr_info("nand_read_bbt: reserved block at 0x%012llx\n",
(loff_t)(offs + act) <<
- this->bbt_erase_shift);
- bbt_mark_entry(this, offs + act,
+ bbt->bbt_erase_shift);
+ bbt_mark_entry(bbt, offs + act,
BBT_BLOCK_RESERVED);
mtd->ecc_stats.bbtblocks++;
continue;
@@ -216,13 +215,13 @@ static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,
*/
pr_info("nand_read_bbt: bad block at 0x%012llx\n",
(loff_t)(offs + act) <<
- this->bbt_erase_shift);
+ bbt->bbt_erase_shift);
/* Factory marked bad or worn out? */
if (tmp == 0)
- bbt_mark_entry(this, offs + act,
+ bbt_mark_entry(bbt, offs + act,
BBT_BLOCK_FACTORY_BAD);
else
- bbt_mark_entry(this, offs + act,
+ bbt_mark_entry(bbt, offs + act,
BBT_BLOCK_WORN);
mtd->ecc_stats.badblocks++;
}
@@ -235,7 +234,7 @@ static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,
/**
* read_abs_bbt - [GENERIC] Read the bad block table starting at a given page
- * @mtd: MTD device structure
+ * @bbt: NAND BBT structure
* @buf: temporary buffer
* @td: descriptor for the bad block table
* @chip: read the table for a specific chip, -1 read all chips; applies only if
@@ -244,25 +243,25 @@ static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,
* Read the bad block table for all chips starting at a given page. We assume
* that the bbt bits are in consecutive order.
*/
-static int read_abs_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td, int chip)
+static int read_abs_bbt(struct nand_bbt *bbt, uint8_t *buf, struct nand_bbt_descr *td, int chip)
{
- struct nand_chip *this = mtd_to_nand(mtd);
+ struct mtd_info *mtd = bbt->mtd;
int res = 0, i;
if (td->options & NAND_BBT_PERCHIP) {
int offs = 0;
- for (i = 0; i < this->numchips; i++) {
+ for (i = 0; i < bbt->numchips; i++) {
if (chip == -1 || chip == i)
- res = read_bbt(mtd, buf, td->pages[i],
- this->chipsize >> this->bbt_erase_shift,
+ res = read_bbt(bbt, buf, td->pages[i],
+ bbt->chipsize >> bbt->bbt_erase_shift,
td, offs);
if (res)
return res;
- offs += this->chipsize >> this->bbt_erase_shift;
+ offs += bbt->chipsize >> bbt->bbt_erase_shift;
}
} else {
- res = read_bbt(mtd, buf, td->pages[0],
- mtd->size >> this->bbt_erase_shift, td, 0);
+ res = read_bbt(bbt, buf, td->pages[0],
+ mtd->size >> bbt->bbt_erase_shift, td, 0);
if (res)
return res;
}
@@ -270,7 +269,7 @@ static int read_abs_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_desc
}
/* BBT marker is in the first page, no OOB */
-static int scan_read_data(struct mtd_info *mtd, uint8_t *buf, loff_t offs,
+static int scan_read_data(struct nand_bbt *bbt, uint8_t *buf, loff_t offs,
struct nand_bbt_descr *td)
{
size_t retlen;
@@ -280,12 +279,12 @@ static int scan_read_data(struct mtd_info *mtd, uint8_t *buf, loff_t offs,
if (td->options & NAND_BBT_VERSION)
len++;
- return mtd_read(mtd, offs, len, &retlen, buf);
+ return mtd_read(bbt->mtd, offs, len, &retlen, buf);
}
/**
* scan_read_oob - [GENERIC] Scan data+OOB region to buffer
- * @mtd: MTD device structure
+ * @bbt: NAND BBT structure
* @buf: temporary buffer
* @offs: offset at which to scan
* @len: length of data region to read
@@ -294,9 +293,10 @@ static int scan_read_data(struct mtd_info *mtd, uint8_t *buf, loff_t offs,
* page,OOB,page,OOB,... in buf. Completes transfer and returns the "strongest"
* ECC condition (error or bitflip). May quit on the first (non-ECC) error.
*/
-static int scan_read_oob(struct mtd_info *mtd, uint8_t *buf, loff_t offs,
+static int scan_read_oob(struct nand_bbt *bbt, uint8_t *buf, loff_t offs,
size_t len)
{
+ struct mtd_info *mtd = bbt->mtd;
struct mtd_oob_ops ops;
int res, ret = 0;
@@ -324,19 +324,20 @@ static int scan_read_oob(struct mtd_info *mtd, uint8_t *buf, loff_t offs,
return ret;
}
-static int scan_read(struct mtd_info *mtd, uint8_t *buf, loff_t offs,
+static int scan_read(struct nand_bbt *bbt, uint8_t *buf, loff_t offs,
size_t len, struct nand_bbt_descr *td)
{
if (td->options & NAND_BBT_NO_OOB)
- return scan_read_data(mtd, buf, offs, td);
+ return scan_read_data(bbt, buf, offs, td);
else
- return scan_read_oob(mtd, buf, offs, len);
+ return scan_read_oob(bbt, buf, offs, len);
}
/* Scan write data with oob to flash */
-static int scan_write_bbt(struct mtd_info *mtd, loff_t offs, size_t len,
+static int scan_write_bbt(struct nand_bbt *bbt, loff_t offs, size_t len,
uint8_t *buf, uint8_t *oob)
{
+ struct mtd_info *mtd = bbt->mtd;
struct mtd_oob_ops ops;
ops.mode = MTD_OPS_PLACE_OOB;
@@ -349,18 +350,18 @@ static int scan_write_bbt(struct mtd_info *mtd, loff_t offs, size_t len,
return mtd_write_oob(mtd, offs, &ops);
}
-static u32 bbt_get_ver_offs(struct mtd_info *mtd, struct nand_bbt_descr *td)
+static u32 bbt_get_ver_offs(struct nand_bbt *bbt, struct nand_bbt_descr *td)
{
u32 ver_offs = td->veroffs;
if (!(td->options & NAND_BBT_NO_OOB))
- ver_offs += mtd->writesize;
+ ver_offs += bbt->mtd->writesize;
return ver_offs;
}
/**
* read_abs_bbts - [GENERIC] Read the bad block table(s) for all chips starting at a given page
- * @mtd: MTD device structure
+ * @bbt: NAND BBT structure
* @buf: temporary buffer
* @td: descriptor for the bad block table
* @md: descriptor for the bad block table mirror
@@ -368,25 +369,25 @@ static u32 bbt_get_ver_offs(struct mtd_info *mtd, struct nand_bbt_descr *td)
* Read the bad block table(s) for all chips starting at a given page. We
* assume that the bbt bits are in consecutive order.
*/
-static void read_abs_bbts(struct mtd_info *mtd, uint8_t *buf,
+static void read_abs_bbts(struct nand_bbt *bbt, uint8_t *buf,
struct nand_bbt_descr *td, struct nand_bbt_descr *md)
{
- struct nand_chip *this = mtd_to_nand(mtd);
+ struct mtd_info *mtd = bbt->mtd;
/* Read the primary version, if available */
if (td->options & NAND_BBT_VERSION) {
- scan_read(mtd, buf, (loff_t)td->pages[0] << this->page_shift,
+ scan_read(bbt, buf, (loff_t)td->pages[0] << bbt->page_shift,
mtd->writesize, td);
- td->version[0] = buf[bbt_get_ver_offs(mtd, td)];
+ td->version[0] = buf[bbt_get_ver_offs(bbt, td)];
pr_info("Bad block table at page %d, version 0x%02X\n",
td->pages[0], td->version[0]);
}
/* Read the mirror version, if available */
if (md && (md->options & NAND_BBT_VERSION)) {
- scan_read(mtd, buf, (loff_t)md->pages[0] << this->page_shift,
+ scan_read(bbt, buf, (loff_t)md->pages[0] << bbt->page_shift,
mtd->writesize, md);
- md->version[0] = buf[bbt_get_ver_offs(mtd, md)];
+ md->version[0] = buf[bbt_get_ver_offs(bbt, md)];
pr_info("Bad block table at page %d, version 0x%02X\n",
md->pages[0], md->version[0]);
}
@@ -394,59 +395,59 @@ static void read_abs_bbts(struct mtd_info *mtd, uint8_t *buf,
/**
* create_bbt - [GENERIC] Create a bad block table by scanning the device
- * @mtd: MTD device structure
+ * @bbt: NAND BBT structure
* @chip: create the table for a specific chip, -1 read all chips; applies only
* if NAND_BBT_PERCHIP option is set
*
* Create a bad block table by scanning the device for the given good/bad block
* identify pattern.
*/
-static int create_bbt(struct mtd_info *mtd, int chip)
+static int create_bbt(struct nand_bbt *bbt, int chip)
{
- struct nand_chip *this = mtd_to_nand(mtd);
+ struct mtd_info *mtd = bbt->mtd;
int i, startblock, numblocks;
loff_t from;
pr_info("Scanning device for bad blocks\n");
if (chip == -1) {
- numblocks = mtd->size >> this->bbt_erase_shift;
+ numblocks = mtd->size >> bbt->bbt_erase_shift;
startblock = 0;
from = 0;
} else {
- if (chip >= this->numchips) {
+ if (chip >= bbt->numchips) {
pr_warn("create_bbt(): chipnr (%d) > available chips (%d)\n",
- chip + 1, this->numchips);
+ chip + 1, bbt->numchips);
return -EINVAL;
}
- numblocks = this->chipsize >> this->bbt_erase_shift;
+ numblocks = bbt->chipsize >> bbt->bbt_erase_shift;
startblock = chip * numblocks;
numblocks += startblock;
- from = (loff_t)startblock << this->bbt_erase_shift;
+ from = (loff_t)startblock << bbt->bbt_erase_shift;
}
for (i = startblock; i < numblocks; i++) {
int ret;
- ret = this->nand_bbt->is_bad_bbm(mtd, from);
+ ret = bbt->is_bad_bbm(mtd, from);
if (ret < 0)
return ret;
if (ret) {
- bbt_mark_entry(this, i, BBT_BLOCK_FACTORY_BAD);
+ bbt_mark_entry(bbt, i, BBT_BLOCK_FACTORY_BAD);
pr_warn("Bad eraseblock %d at 0x%012llx\n",
i, (unsigned long long)from);
mtd->ecc_stats.badblocks++;
}
- from += (1 << this->bbt_erase_shift);
+ from += (1 << bbt->bbt_erase_shift);
}
return 0;
}
/**
* search_bbt - [GENERIC] scan the device for a specific bad block table
- * @mtd: MTD device structure
+ * @bbt: NAND BBT structure
* @buf: temporary buffer
* @td: descriptor for the bad block table
*
@@ -459,18 +460,18 @@ static int create_bbt(struct mtd_info *mtd, int chip)
*
* The bbt ident pattern resides in the oob area of the first page in a block.
*/
-static int search_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td)
+static int search_bbt(struct nand_bbt *bbt, uint8_t *buf, struct nand_bbt_descr *td)
{
- struct nand_chip *this = mtd_to_nand(mtd);
+ struct mtd_info *mtd = bbt->mtd;
int i, chips;
int startblock, block, dir;
int scanlen = mtd->writesize + mtd->oobsize;
int bbtblocks;
- int blocktopage = this->bbt_erase_shift - this->page_shift;
+ int blocktopage = bbt->bbt_erase_shift - bbt->page_shift;
/* Search direction top -> down? */
if (td->options & NAND_BBT_LASTBLOCK) {
- startblock = (mtd->size >> this->bbt_erase_shift) - 1;
+ startblock = (mtd->size >> bbt->bbt_erase_shift) - 1;
dir = -1;
} else {
startblock = 0;
@@ -479,12 +480,12 @@ static int search_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
/* Do we have a bbt per chip? */
if (td->options & NAND_BBT_PERCHIP) {
- chips = this->numchips;
- bbtblocks = this->chipsize >> this->bbt_erase_shift;
+ chips = bbt->numchips;
+ bbtblocks = bbt->chipsize >> bbt->bbt_erase_shift;
startblock &= bbtblocks - 1;
} else {
chips = 1;
- bbtblocks = mtd->size >> this->bbt_erase_shift;
+ bbtblocks = mtd->size >> bbt->bbt_erase_shift;
}
for (i = 0; i < chips; i++) {
@@ -495,20 +496,20 @@ static int search_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
for (block = 0; block < td->maxblocks; block++) {
int actblock = startblock + dir * block;
- loff_t offs = (loff_t)actblock << this->bbt_erase_shift;
+ loff_t offs = (loff_t)actblock << bbt->bbt_erase_shift;
/* Read first page */
- scan_read(mtd, buf, offs, mtd->writesize, td);
+ scan_read(bbt, buf, offs, mtd->writesize, td);
if (!check_pattern(buf, scanlen, mtd->writesize, td)) {
td->pages[i] = actblock << blocktopage;
if (td->options & NAND_BBT_VERSION) {
- offs = bbt_get_ver_offs(mtd, td);
+ offs = bbt_get_ver_offs(bbt, td);
td->version[i] = buf[offs];
}
break;
}
}
- startblock += this->chipsize >> this->bbt_erase_shift;
+ startblock += bbt->chipsize >> bbt->bbt_erase_shift;
}
/* Check, if we found a bbt for each requested chip */
for (i = 0; i < chips; i++) {
@@ -523,28 +524,28 @@ static int search_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr
/**
* search_read_bbts - [GENERIC] scan the device for bad block table(s)
- * @mtd: MTD device structure
+ * @bbt: NAND BBT structure
* @buf: temporary buffer
* @td: descriptor for the bad block table
* @md: descriptor for the bad block table mirror
*
* Search and read the bad block table(s).
*/
-static void search_read_bbts(struct mtd_info *mtd, uint8_t *buf,
+static void search_read_bbts(struct nand_bbt *bbt, uint8_t *buf,
struct nand_bbt_descr *td,
struct nand_bbt_descr *md)
{
/* Search the primary table */
- search_bbt(mtd, buf, td);
+ search_bbt(bbt, buf, td);
/* Search the mirror table */
if (md)
- search_bbt(mtd, buf, md);
+ search_bbt(bbt, buf, md);
}
/**
* write_bbt - [GENERIC] (Re)write the bad block table
- * @mtd: MTD device structure
+ * @bbt: NAND BBT structure
* @buf: temporary buffer
* @td: descriptor for the bad block table
* @md: descriptor for the bad block table mirror
@@ -552,11 +553,11 @@ static void search_read_bbts(struct mtd_info *mtd, uint8_t *buf,
*
* (Re)write the bad block table.
*/
-static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
+static int write_bbt(struct nand_bbt *bbt, uint8_t *buf,
struct nand_bbt_descr *td, struct nand_bbt_descr *md,
int chipsel)
{
- struct nand_chip *this = mtd_to_nand(mtd);
+ struct mtd_info *mtd = bbt->mtd;
int i, res, chip = 0;
int bits, startblock, dir, page, offs, numblocks, sft, sftmsk;
int nrchips, pageoffs, ooboffs;
@@ -575,16 +576,16 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
rcode = 0xff;
/* Write bad block table per chip rather than per device? */
if (td->options & NAND_BBT_PERCHIP) {
- numblocks = (int)(this->chipsize >> this->bbt_erase_shift);
+ numblocks = (int)(bbt->chipsize >> bbt->bbt_erase_shift);
/* Full device write or specific chip? */
if (chipsel == -1) {
- nrchips = this->numchips;
+ nrchips = bbt->numchips;
} else {
nrchips = chipsel + 1;
chip = chipsel;
}
} else {
- numblocks = (int)(mtd->size >> this->bbt_erase_shift);
+ numblocks = (int)(mtd->size >> bbt->bbt_erase_shift);
nrchips = 1;
}
@@ -615,13 +616,13 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
for (i = 0; i < td->maxblocks; i++) {
int block = startblock + dir * i;
/* Check, if the block is bad */
- switch (bbt_get_entry(this, block)) {
+ switch (bbt_get_entry(bbt, block)) {
case BBT_BLOCK_WORN:
case BBT_BLOCK_FACTORY_BAD:
continue;
}
page = block <<
- (this->bbt_erase_shift - this->page_shift);
+ (bbt->bbt_erase_shift - bbt->page_shift);
/* Check, if the block is used by the mirror table */
if (!md || md->pages[chip] != page)
goto write;
@@ -649,13 +650,13 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
default: return -EINVAL;
}
- to = ((loff_t)page) << this->page_shift;
+ to = ((loff_t)page) << bbt->page_shift;
/* Must we save the block contents? */
if (td->options & NAND_BBT_SAVECONTENT) {
/* Make it block aligned */
- to &= ~(((loff_t)1 << this->bbt_erase_shift) - 1);
- len = 1 << this->bbt_erase_shift;
+ to &= ~(((loff_t)1 << bbt->bbt_erase_shift) - 1);
+ len = 1 << bbt->bbt_erase_shift;
res = mtd_read(mtd, to, len, &retlen, buf);
if (res < 0) {
if (retlen != len) {
@@ -665,15 +666,15 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
pr_warn("nand_bbt: ECC error while reading block for writing bad block table\n");
}
/* Read oob data */
- ops.ooblen = (len >> this->page_shift) * mtd->oobsize;
+ ops.ooblen = (len >> bbt->page_shift) * mtd->oobsize;
ops.oobbuf = &buf[len];
res = mtd_read_oob(mtd, to + mtd->writesize, &ops);
if (res < 0 || ops.oobretlen != ops.ooblen)
goto outerr;
/* Calc the byte offset in the buffer */
- pageoffs = page - (int)(to >> this->page_shift);
- offs = pageoffs << this->page_shift;
+ pageoffs = page - (int)(to >> bbt->page_shift);
+ offs = pageoffs << bbt->page_shift;
/* Preset the bbt area with 0xff */
memset(&buf[offs], 0xff, (size_t)(numblocks >> sft));
ooboffs = len + (pageoffs * mtd->oobsize);
@@ -700,7 +701,7 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
len = ALIGN(len, mtd->writesize);
/* Preset the buffer with 0xff */
memset(buf, 0xff, len +
- (len >> this->page_shift)* mtd->oobsize);
+ (len >> bbt->page_shift) * mtd->oobsize);
offs = 0;
ooboffs = len;
/* Pattern is located in oob area of first page */
@@ -714,16 +715,16 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
for (i = 0; i < numblocks; i++) {
uint8_t dat;
int sftcnt = (i << (3 - sft)) & sftmsk;
- dat = bbt_get_entry(this, chip * numblocks + i);
+ dat = bbt_get_entry(bbt, chip * numblocks + i);
/* Do not store the reserved bbt blocks! */
buf[offs + (i >> sft)] &= ~(msk[dat] << sftcnt);
}
- res = this->nand_bbt->erase(mtd, to);
+ res = bbt->erase(mtd, to);
if (res < 0)
goto outerr;
- res = scan_write_bbt(mtd, to, len, buf,
+ res = scan_write_bbt(bbt, to, len, buf,
td->options & NAND_BBT_NO_OOB ? NULL :
&buf[len]);
if (res < 0)
@@ -744,19 +745,19 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
/**
* nand_memory_bbt - [GENERIC] create a memory based bad block table
- * @mtd: MTD device structure
+ * @bbt: NAND BBT structure
*
* The function creates a memory based bbt by scanning the device for
* manufacturer / software marked good / bad blocks.
*/
-static inline int nand_memory_bbt(struct mtd_info *mtd)
+static inline int nand_memory_bbt(struct nand_bbt *bbt)
{
- return create_bbt(mtd, -1);
+ return create_bbt(bbt, -1);
}
/**
* check_create - [GENERIC] create and write bbt(s) if necessary
- * @mtd: MTD device structure
+ * @bbt: NAND BBT structure
* @buf: temporary buffer
*
* The function checks the results of the previous call to read_bbt and creates
@@ -764,17 +765,16 @@ static inline int nand_memory_bbt(struct mtd_info *mtd)
* for the chip/device. Update is necessary if one of the tables is missing or
* the version nr. of one table is less than the other.
*/
-static int check_create(struct mtd_info *mtd, uint8_t *buf)
+static int check_create(struct nand_bbt *bbt, uint8_t *buf)
{
int i, chips, writeops, create, chipsel, res, res2;
- struct nand_chip *this = mtd_to_nand(mtd);
- struct nand_bbt_descr *td = this->bbt_td;
- struct nand_bbt_descr *md = this->bbt_md;
+ struct nand_bbt_descr *td = bbt->bbt_td;
+ struct nand_bbt_descr *md = bbt->bbt_md;
struct nand_bbt_descr *rd, *rd2;
/* Do we have a bbt per chip? */
if (td->options & NAND_BBT_PERCHIP)
- chips = this->numchips;
+ chips = bbt->numchips;
else
chips = 1;
@@ -823,8 +823,8 @@ static int check_create(struct mtd_info *mtd, uint8_t *buf)
continue;
/* Create the table in memory by scanning the chip(s) */
- if (!(this->bbt_options & NAND_BBT_CREATE_EMPTY))
- create_bbt(mtd, chipsel);
+ if (!(bbt->bbt_options & NAND_BBT_CREATE_EMPTY))
+ create_bbt(bbt, chipsel);
td->version[i] = 1;
if (md)
@@ -833,7 +833,7 @@ static int check_create(struct mtd_info *mtd, uint8_t *buf)
/* Read back first? */
if (rd) {
- res = read_abs_bbt(mtd, buf, rd, chipsel);
+ res = read_abs_bbt(bbt, buf, rd, chipsel);
if (mtd_is_eccerr(res)) {
/* Mark table as invalid */
rd->pages[i] = -1;
@@ -844,7 +844,7 @@ static int check_create(struct mtd_info *mtd, uint8_t *buf)
}
/* If they weren't versioned, read both */
if (rd2) {
- res2 = read_abs_bbt(mtd, buf, rd2, chipsel);
+ res2 = read_abs_bbt(bbt, buf, rd2, chipsel);
if (mtd_is_eccerr(res2)) {
/* Mark table as invalid */
rd2->pages[i] = -1;
@@ -866,14 +866,14 @@ static int check_create(struct mtd_info *mtd, uint8_t *buf)
/* Write the bad block table to the device? */
if ((writeops & 0x01) && (td->options & NAND_BBT_WRITE)) {
- res = write_bbt(mtd, buf, td, md, chipsel);
+ res = write_bbt(bbt, buf, td, md, chipsel);
if (res < 0)
return res;
}
/* Write the mirror bad block table to the device? */
if ((writeops & 0x02) && md && (md->options & NAND_BBT_WRITE)) {
- res = write_bbt(mtd, buf, md, td, chipsel);
+ res = write_bbt(bbt, buf, md, td, chipsel);
if (res < 0)
return res;
}
@@ -883,25 +883,25 @@ static int check_create(struct mtd_info *mtd, uint8_t *buf)
/**
* mark_bbt_regions - [GENERIC] mark the bad block table regions
- * @mtd: MTD device structure
+ * @bbt: NAND BBT structure
* @td: bad block table descriptor
*
* The bad block table regions are marked as "bad" to prevent accidental
* erasures / writes. The regions are identified by the mark 0x02.
*/
-static void mark_bbt_region(struct mtd_info *mtd, struct nand_bbt_descr *td)
+static void mark_bbt_region(struct nand_bbt *bbt, struct nand_bbt_descr *td)
{
- struct nand_chip *this = mtd_to_nand(mtd);
+ struct mtd_info *mtd = bbt->mtd;
int i, j, chips, block, nrblocks, update;
uint8_t oldval;
/* Do we have a bbt per chip? */
if (td->options & NAND_BBT_PERCHIP) {
- chips = this->numchips;
- nrblocks = (int)(this->chipsize >> this->bbt_erase_shift);
+ chips = bbt->numchips;
+ nrblocks = (int)(bbt->chipsize >> bbt->bbt_erase_shift);
} else {
chips = 1;
- nrblocks = (int)(mtd->size >> this->bbt_erase_shift);
+ nrblocks = (int)(mtd->size >> bbt->bbt_erase_shift);
}
for (i = 0; i < chips; i++) {
@@ -909,13 +909,13 @@ static void mark_bbt_region(struct mtd_info *mtd, struct nand_bbt_descr *td)
!(td->options & NAND_BBT_WRITE)) {
if (td->pages[i] == -1)
continue;
- block = td->pages[i] >> (this->bbt_erase_shift - this->page_shift);
- oldval = bbt_get_entry(this, block);
- bbt_mark_entry(this, block, BBT_BLOCK_RESERVED);
+ block = td->pages[i] >> (bbt->bbt_erase_shift - bbt->page_shift);
+ oldval = bbt_get_entry(bbt, block);
+ bbt_mark_entry(bbt, block, BBT_BLOCK_RESERVED);
if ((oldval != BBT_BLOCK_RESERVED) &&
td->reserved_block_code)
- nand_update_bbt(mtd, (loff_t)block <<
- this->bbt_erase_shift);
+ nand_update_bbt(bbt, (loff_t)block <<
+ bbt->bbt_erase_shift);
continue;
}
update = 0;
@@ -924,8 +924,8 @@ static void mark_bbt_region(struct mtd_info *mtd, struct nand_bbt_descr *td)
else
block = i * nrblocks;
for (j = 0; j < td->maxblocks; j++) {
- oldval = bbt_get_entry(this, block);
- bbt_mark_entry(this, block, BBT_BLOCK_RESERVED);
+ oldval = bbt_get_entry(bbt, block);
+ bbt_mark_entry(bbt, block, BBT_BLOCK_RESERVED);
if (oldval != BBT_BLOCK_RESERVED)
update = 1;
block++;
@@ -936,22 +936,22 @@ static void mark_bbt_region(struct mtd_info *mtd, struct nand_bbt_descr *td)
* bbts. This should only happen once.
*/
if (update && td->reserved_block_code)
- nand_update_bbt(mtd, (loff_t)(block - 1) <<
- this->bbt_erase_shift);
+ nand_update_bbt(bbt, (loff_t)(block - 1) <<
+ bbt->bbt_erase_shift);
}
}
/**
* verify_bbt_descr - verify the bad block description
- * @mtd: MTD device structure
+ * @bbt: NAND BBT structure
* @bd: the table to verify
*
* This functions performs a few sanity checks on the bad block description
* table.
*/
-static void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd)
+static void verify_bbt_descr(struct nand_bbt *bbt, struct nand_bbt_descr *bd)
{
- struct nand_chip *this = mtd_to_nand(mtd);
+ struct mtd_info *mtd = bbt->mtd;
u32 pattern_len;
u32 bits;
u32 table_size;
@@ -962,16 +962,16 @@ static void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd)
pattern_len = bd->len;
bits = bd->options & NAND_BBT_NRBITS_MSK;
- BUG_ON((this->bbt_options & NAND_BBT_NO_OOB) &&
- !(this->bbt_options & NAND_BBT_USE_FLASH));
+ BUG_ON((bbt->bbt_options & NAND_BBT_NO_OOB) &&
+ !(bbt->bbt_options & NAND_BBT_USE_FLASH));
BUG_ON(!bits);
if (bd->options & NAND_BBT_VERSION)
pattern_len++;
if (bd->options & NAND_BBT_NO_OOB) {
- BUG_ON(!(this->bbt_options & NAND_BBT_USE_FLASH));
- BUG_ON(!(this->bbt_options & NAND_BBT_NO_OOB));
+ BUG_ON(!(bbt->bbt_options & NAND_BBT_USE_FLASH));
+ BUG_ON(!(bbt->bbt_options & NAND_BBT_NO_OOB));
BUG_ON(bd->offs);
if (bd->options & NAND_BBT_VERSION)
BUG_ON(bd->veroffs != bd->len);
@@ -979,19 +979,19 @@ static void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd)
}
if (bd->options & NAND_BBT_PERCHIP)
- table_size = this->chipsize >> this->bbt_erase_shift;
+ table_size = bbt->chipsize >> bbt->bbt_erase_shift;
else
- table_size = mtd->size >> this->bbt_erase_shift;
+ table_size = mtd->size >> bbt->bbt_erase_shift;
table_size >>= 3;
table_size *= bits;
if (bd->options & NAND_BBT_NO_OOB)
table_size += pattern_len;
- BUG_ON(table_size > (1 << this->bbt_erase_shift));
+ BUG_ON(table_size > (1 << bbt->bbt_erase_shift));
}
/**
* nand_scan_bbt - [NAND Interface] scan, find, read and maybe create bad block table(s)
- * @mtd: MTD device structure
+ * @bbt: NAND BBT structure
*
* The function checks, if a bad block table(s) is/are already available. If
* not it scans the device for manufacturer marked good / bad blocks and writes
@@ -1000,21 +1000,21 @@ static void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd)
* The bad block table memory is allocated here. It must be freed by calling
* the nand_free_bbt function.
*/
-static int nand_scan_bbt(struct mtd_info *mtd)
+static int nand_scan_bbt(struct nand_bbt *bbt)
{
- struct nand_chip *this = mtd_to_nand(mtd);
- int len, res;
+ struct mtd_info *mtd = bbt->mtd;
+ int len, res = 0;
uint8_t *buf;
- struct nand_bbt_descr *td = this->bbt_td;
- struct nand_bbt_descr *md = this->bbt_md;
+ struct nand_bbt_descr *td = bbt->bbt_td;
+ struct nand_bbt_descr *md = bbt->bbt_md;
len = (mtd->size >> (this->bbt_erase_shift + 2)) ? : 1;
/*
* Allocate memory (2bit per block) and clear the memory bad block
* table.
*/
- this->bbt = kzalloc(len, GFP_KERNEL);
- if (!this->bbt)
+ bbt->bbt = kzalloc(len, GFP_KERNEL);
+ if (!bbt->bbt)
return -ENOMEM;
/*
@@ -1022,18 +1022,18 @@ static int nand_scan_bbt(struct mtd_info *mtd)
* memory based bad block table.
*/
if (!td) {
- if ((res = nand_memory_bbt(mtd))) {
+ if ((res = nand_memory_bbt(bbt))) {
pr_err("nand_bbt: can't scan flash and build the RAM-based BBT\n");
goto err;
}
return 0;
}
- verify_bbt_descr(mtd, td);
- verify_bbt_descr(mtd, md);
+ verify_bbt_descr(bbt, td);
+ verify_bbt_descr(bbt, md);
/* Allocate a temporary buffer for one eraseblock incl. oob */
- len = (1 << this->bbt_erase_shift);
- len += (len >> this->page_shift) * mtd->oobsize;
+ len = (1 << bbt->bbt_erase_shift);
+ len += (len >> bbt->page_shift) * mtd->oobsize;
buf = vmalloc(len);
if (!buf) {
res = -ENOMEM;
@@ -1042,59 +1042,59 @@ static int nand_scan_bbt(struct mtd_info *mtd)
/* Is the bbt at a given page? */
if (td->options & NAND_BBT_ABSPAGE) {
- read_abs_bbts(mtd, buf, td, md);
+ read_abs_bbts(bbt, buf, td, md);
} else {
/* Search the bad block table using a pattern in oob */
- search_read_bbts(mtd, buf, td, md);
+ search_read_bbts(bbt, buf, td, md);
}
- res = check_create(mtd, buf);
+ res = check_create(bbt, buf);
if (res)
goto err;
/* Prevent the bbt regions from erasing / writing */
- mark_bbt_region(mtd, td);
+ mark_bbt_region(bbt, td);
if (md)
- mark_bbt_region(mtd, md);
+ mark_bbt_region(bbt, md);
vfree(buf);
return 0;
err:
- kfree(this->bbt);
- this->bbt = NULL;
+ kfree(bbt->bbt);
+ bbt->bbt = NULL;
return res;
}
/**
* nand_update_bbt - update bad block table(s)
- * @mtd: MTD device structure
+ * @bbt: NAND BBT structure
* @offs: the offset of the newly marked block
*
* The function updates the bad block table(s).
*/
-static int nand_update_bbt(struct mtd_info *mtd, loff_t offs)
+static int nand_update_bbt(struct nand_bbt *bbt, loff_t offs)
{
- struct nand_chip *this = mtd_to_nand(mtd);
+ struct mtd_info *mtd = bbt->mtd;
int len, res = 0;
int chip, chipsel;
uint8_t *buf;
- struct nand_bbt_descr *td = this->bbt_td;
- struct nand_bbt_descr *md = this->bbt_md;
+ struct nand_bbt_descr *td = bbt->bbt_td;
+ struct nand_bbt_descr *md = bbt->bbt_md;
- if (!this->bbt || !td)
+ if (!bbt->bbt || !td)
return -EINVAL;
/* Allocate a temporary buffer for one eraseblock incl. oob */
- len = (1 << this->bbt_erase_shift);
- len += (len >> this->page_shift) * mtd->oobsize;
+ len = (1 << bbt->bbt_erase_shift);
+ len += (len >> bbt->page_shift) * mtd->oobsize;
buf = kmalloc(len, GFP_KERNEL);
if (!buf)
return -ENOMEM;
/* Do we have a bbt per chip? */
if (td->options & NAND_BBT_PERCHIP) {
- chip = (int)(offs >> this->chip_shift);
+ chip = (int)(offs >> bbt->chip_shift);
chipsel = chip;
} else {
chip = 0;
@@ -1107,13 +1107,13 @@ static int nand_update_bbt(struct mtd_info *mtd, loff_t offs)
/* Write the bad block table to the device? */
if (td->options & NAND_BBT_WRITE) {
- res = write_bbt(mtd, buf, td, md, chipsel);
+ res = write_bbt(bbt, buf, td, md, chipsel);
if (res < 0)
goto out;
}
/* Write the mirror bad block table to the device? */
if (md && (md->options & NAND_BBT_WRITE)) {
- res = write_bbt(mtd, buf, md, td, chipsel);
+ res = write_bbt(bbt, buf, md, td, chipsel);
}
out:
@@ -1167,62 +1167,58 @@ static struct nand_bbt_descr bbt_mirror_no_oob_descr = {
/**
* nand_default_bbt - [NAND Interface] Select a default bad block table for the device
- * @mtd: MTD device structure
+ * @bbt: NAND BBT structure
*
* This function selects the default bad block table support for the device and
* calls the nand_scan_bbt function.
*/
-int nand_default_bbt(struct mtd_info *mtd)
+int nand_default_bbt(struct nand_bbt *bbt)
{
- struct nand_chip *this = mtd_to_nand(mtd);
-
/* Is a flash based bad block table requested? */
- if (this->bbt_options & NAND_BBT_USE_FLASH) {
+ if (bbt->bbt_options & NAND_BBT_USE_FLASH) {
/* Use the default pattern descriptors */
- if (!this->bbt_td) {
- if (this->bbt_options & NAND_BBT_NO_OOB) {
- this->bbt_td = &bbt_main_no_oob_descr;
- this->bbt_md = &bbt_mirror_no_oob_descr;
+ if (!bbt->bbt_td) {
+ if (bbt->bbt_options & NAND_BBT_NO_OOB) {
+ bbt->bbt_td = &bbt_main_no_oob_descr;
+ bbt->bbt_md = &bbt_mirror_no_oob_descr;
} else {
- this->bbt_td = &bbt_main_descr;
- this->bbt_md = &bbt_mirror_descr;
+ bbt->bbt_td = &bbt_main_descr;
+ bbt->bbt_md = &bbt_mirror_descr;
}
}
} else {
- this->bbt_td = NULL;
- this->bbt_md = NULL;
+ bbt->bbt_td = NULL;
+ bbt->bbt_md = NULL;
}
- return nand_scan_bbt(mtd);
+ return nand_scan_bbt(bbt);
}
/**
* nand_isreserved_bbt - [NAND Interface] Check if a block is reserved
- * @mtd: MTD device structure
+ * @bbt: NAND BBT structure
* @offs: offset in the device
*/
-int nand_isreserved_bbt(struct mtd_info *mtd, loff_t offs)
+int nand_isreserved_bbt(struct nand_bbt *bbt, loff_t offs)
{
- struct nand_chip *this = mtd_to_nand(mtd);
int block;
- block = (int)(offs >> this->bbt_erase_shift);
- return bbt_get_entry(this, block) == BBT_BLOCK_RESERVED;
+ block = (int)(offs >> bbt->bbt_erase_shift);
+ return bbt_get_entry(bbt, block) == BBT_BLOCK_RESERVED;
}
/**
* nand_isbad_bbt - [NAND Interface] Check if a block is bad
- * @mtd: MTD device structure
+ * @bbt: NAND BBT structure
* @offs: offset in the device
* @allowbbt: allow access to bad block table region
*/
-int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt)
+int nand_isbad_bbt(struct nand_bbt *bbt, loff_t offs, int allowbbt)
{
- struct nand_chip *this = mtd_to_nand(mtd);
int block, res;
- block = (int)(offs >> this->bbt_erase_shift);
- res = bbt_get_entry(this, block);
+ block = (int)(offs >> bbt->bbt_erase_shift);
+ res = bbt_get_entry(bbt, block);
pr_debug("nand_isbad_bbt(): bbt info for offs 0x%08x: (block %d) 0x%02x\n",
(unsigned int)offs, block, res);
@@ -1240,35 +1236,34 @@ int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt)
/**
* nand_bbt_update_mark - update mark in the BBT
- * @mtd: MTD device structure
+ * @bbt: NAND BBT structure
* @offs: offset of the bad block
* @mark: block type mark
*/
-static int nand_bbt_update_mark(struct mtd_info *mtd, loff_t offs, uint8_t mark)
+static int nand_bbt_update_mark(struct nand_bbt *bbt, loff_t offs, uint8_t mark)
{
- struct nand_chip *this = mtd_to_nand(mtd);
int block, ret = 0;
- block = (int)(offs >> this->bbt_erase_shift);
+ block = (int)(offs >> bbt->bbt_erase_shift);
/* Mark bad block in memory */
- bbt_mark_entry(this, block, mark);
+ bbt_mark_entry(bbt, block, mark);
/* Update flash-based bad block table */
- if (this->bbt_options & NAND_BBT_USE_FLASH)
- ret = nand_update_bbt(mtd, offs);
+ if (bbt->bbt_options & NAND_BBT_USE_FLASH)
+ ret = nand_update_bbt(bbt, offs);
return ret;
}
/**
* nand_markbad_bbt - [NAND Interface] Mark a block bad in the BBT
- * @mtd: MTD device structure
+ * @bbt: NAND BBT structure
* @offs: offset of the bad block
*/
-int nand_markbad_bbt(struct mtd_info *mtd, loff_t offs)
+int nand_markbad_bbt(struct nand_bbt *bbt, loff_t offs)
{
- return nand_bbt_update_mark(mtd, offs, BBT_BLOCK_WORN);
+ return nand_bbt_update_mark(bbt, offs, BBT_BLOCK_WORN);
}
EXPORT_SYMBOL(nand_scan_bbt);
@@ -1286,7 +1281,7 @@ int nand_bbt_init(struct nand_bbt *bbt)
* FIXME: For now, we call nand_default_bbt() directly. It will change
* when we use struct nand_bbt instead of struct nand_chip.
*/
- return nand_default_bbt(bbt->mtd);
+ return nand_default_bbt(bbt);
}
EXPORT_SYMBOL(nand_bbt_init);
@@ -1307,7 +1302,7 @@ int nand_bbt_isreserved(struct nand_bbt *bbt, loff_t offs)
* FIXME: For now, we call nand_isreserved_bbt() directly. It will
* change when we use struct nand_bbt instead of struct nand_chip.
*/
- return nand_isreserved_bbt(bbt->mtd, offs);
+ return nand_isreserved_bbt(bbt, offs);
}
EXPORT_SYMBOL(nand_bbt_isreserved);
@@ -1324,7 +1319,7 @@ int nand_bbt_isbad(struct nand_bbt *bbt, loff_t offs)
* Since we already have nand_bbt_isreserved(), we don't need to
* check pass down allow_bbt.
*/
- return nand_isbad_bbt(bbt->mtd, offs, 1);
+ return nand_isbad_bbt(bbt, offs, 1);
}
EXPORT_SYMBOL(nand_bbt_isbad);
@@ -1339,7 +1334,7 @@ int nand_bbt_markbad(struct nand_bbt *bbt, loff_t offs)
* FIXME: For now, we call nand_markbad_bbt() directly. It will change
* when we use struct nand_bbt instead of struct nand_chip.
*/
- return nand_markbad_bbt(bbt->mtd, offs);
+ return nand_markbad_bbt(bbt, offs);
}
EXPORT_SYMBOL(nand_bbt_markbad);
@@ -1355,6 +1350,6 @@ int nand_bbt_markbad_factory(struct nand_bbt *bbt, loff_t offs)
* FIXME: For now, we call nand_markbad_bbt() directly. It will change
* when we use struct nand_bbt instead of struct nand_chip.
*/
- return nand_bbt_update_mark(bbt->mtd, offs, BBT_BLOCK_FACTORY_BAD);
+ return nand_bbt_update_mark(bbt, offs, BBT_BLOCK_FACTORY_BAD);
}
EXPORT_SYMBOL(nand_bbt_markbad_factory);
--
1.9.1
--
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