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authorThomas Gleixner <tglx@cruncher.tec.linutronix.de>2006-06-20 20:05:05 +0200
committerDavid Woodhouse <dwmw2@infradead.org>2006-06-20 20:31:24 +0100
commit7bc3312bef4d6f220812500c0de7868fb7625a41 (patch)
tree9ad49e850cdfe9868a19a37681bbf4d403e47ed3
parent[PATCH] NAND: fix remaining OOB length calculation (diff)
downloadlinux-dev-7bc3312bef4d6f220812500c0de7868fb7625a41.tar.xz
linux-dev-7bc3312bef4d6f220812500c0de7868fb7625a41.zip
[MTD] NAND: Fix breakage all over the place
Following problems are addressed: - wrong status caused early break out of nand_wait() - removed the bogus status check in nand_wait() which is a relict of the abandoned support for interrupted erase. - status check moved to the correct place in read_oob - oob support for syndrom based ecc with strange layouts - use given offset in the AUTOOOB based oob operations Partially based on a patch from Vitaly Vool <vwool@ru.mvista.com> Thanks to Savin Zlobec <savin@epico.si> for tracking down the status problem. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-rw-r--r--drivers/mtd/mtdchar.c8
-rw-r--r--drivers/mtd/nand/diskonchip.c2
-rw-r--r--drivers/mtd/nand/nand_base.c297
-rw-r--r--include/linux/mtd/nand.h12
4 files changed, 231 insertions, 88 deletions
diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index 5dd0b8d72c8b..aa18d45b264b 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -504,12 +504,12 @@ static int mtd_ioctl(struct inode *inode, struct file *file,
return ret;
ops.len = buf.length;
- ops.ooblen = mtd->oobsize;
+ ops.ooblen = buf.length;
ops.ooboffs = buf.start & (mtd->oobsize - 1);
ops.datbuf = NULL;
ops.mode = MTD_OOB_PLACE;
- if (ops.ooboffs && ops.len > (ops.ooblen - ops.ooboffs))
+ if (ops.ooboffs && ops.len > (mtd->oobsize - ops.ooboffs))
return -EINVAL;
ops.oobbuf = kmalloc(buf.length, GFP_KERNEL);
@@ -553,12 +553,12 @@ static int mtd_ioctl(struct inode *inode, struct file *file,
return ret;
ops.len = buf.length;
- ops.ooblen = mtd->oobsize;
+ ops.ooblen = buf.length;
ops.ooboffs = buf.start & (mtd->oobsize - 1);
ops.datbuf = NULL;
ops.mode = MTD_OOB_PLACE;
- if (ops.ooboffs && ops.len > (ops.ooblen - ops.ooboffs))
+ if (ops.ooboffs && ops.len > (mtd->oobsize - ops.ooboffs))
return -EINVAL;
ops.oobbuf = kmalloc(buf.length, GFP_KERNEL);
diff --git a/drivers/mtd/nand/diskonchip.c b/drivers/mtd/nand/diskonchip.c
index 463e12ced1b3..6107f532855b 100644
--- a/drivers/mtd/nand/diskonchip.c
+++ b/drivers/mtd/nand/diskonchip.c
@@ -464,7 +464,7 @@ static void __init doc2000_count_chips(struct mtd_info *mtd)
printk(KERN_DEBUG "Detected %d chips per floor.\n", i);
}
-static int doc200x_wait(struct mtd_info *mtd, struct nand_chip *this, int state)
+static int doc200x_wait(struct mtd_info *mtd, struct nand_chip *this)
{
struct doc_priv *doc = this->priv;
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index e74678e928cf..27083ed0a017 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -501,7 +501,6 @@ static void nand_command(struct mtd_info *mtd, unsigned int command,
case NAND_CMD_ERASE2:
case NAND_CMD_SEQIN:
case NAND_CMD_STATUS:
- chip->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE);
return;
case NAND_CMD_RESET:
@@ -595,6 +594,7 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command,
case NAND_CMD_ERASE1:
case NAND_CMD_ERASE2:
case NAND_CMD_SEQIN:
+ case NAND_CMD_RNDIN:
case NAND_CMD_STATUS:
case NAND_CMD_DEPLETE1:
return;
@@ -621,6 +621,14 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command,
while (!(chip->read_byte(mtd) & NAND_STATUS_READY)) ;
return;
+ case NAND_CMD_RNDOUT:
+ /* No ready / busy check necessary */
+ chip->cmd_ctrl(mtd, NAND_CMD_RNDOUTSTART,
+ NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE);
+ chip->cmd_ctrl(mtd, NAND_CMD_NONE,
+ NAND_NCE | NAND_CTRL_CHANGE);
+ return;
+
case NAND_CMD_READ0:
chip->cmd_ctrl(mtd, NAND_CMD_READSTART,
NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE);
@@ -689,18 +697,17 @@ nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, int new_state)
* nand_wait - [DEFAULT] wait until the command is done
* @mtd: MTD device structure
* @this: NAND chip structure
- * @state: state to select the max. timeout value
*
* Wait for command done. This applies to erase and program only
* Erase can take up to 400ms and program up to 20ms according to
* general NAND and SmartMedia specs
*
*/
-static int nand_wait(struct mtd_info *mtd, struct nand_chip *chip, int state)
+static int nand_wait(struct mtd_info *mtd, struct nand_chip *chip)
{
unsigned long timeo = jiffies;
- int status;
+ int status, state = chip->state;
if (state == FL_ERASING)
timeo += (HZ * 400) / 1000;
@@ -719,10 +726,6 @@ static int nand_wait(struct mtd_info *mtd, struct nand_chip *chip, int state)
chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
while (time_before(jiffies, timeo)) {
- /* Check, if we were interrupted */
- if (chip->state != state)
- return 0;
-
if (chip->dev_ready) {
if (chip->dev_ready(mtd))
break;
@@ -909,12 +912,25 @@ static uint8_t *nand_transfer_oob(struct nand_chip *chip, uint8_t *oob,
case MTD_OOB_AUTO: {
struct nand_oobfree *free = chip->ecc.layout->oobfree;
- size_t bytes;
+ uint32_t boffs = 0, roffs = ops->ooboffs;
+ size_t bytes = 0;
for(; free->length && len; free++, len -= bytes) {
- bytes = min_t(size_t, len, free->length);
-
- memcpy(oob, chip->oob_poi + free->offset, bytes);
+ /* Read request not from offset 0 ? */
+ if (unlikely(roffs)) {
+ if (roffs >= free->length) {
+ roffs -= free->length;
+ continue;
+ }
+ boffs = free->offset + roffs;
+ bytes = min_t(size_t, len,
+ (free->length - roffs));
+ roffs = 0;
+ } else {
+ bytes = min_t(size_t, len, free->length);
+ boffs = free->offset;
+ }
+ memcpy(oob, chip->oob_poi + boffs, bytes);
oob += bytes;
}
return oob;
@@ -1084,6 +1100,145 @@ static int nand_read(struct mtd_info *mtd, loff_t from, size_t len,
}
/**
+ * nand_read_oob_std - [REPLACABLE] the most common OOB data read function
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @page: page number to read
+ * @sndcmd: flag whether to issue read command or not
+ */
+static int nand_read_oob_std(struct mtd_info *mtd, struct nand_chip *chip,
+ int page, int sndcmd)
+{
+ if (sndcmd) {
+ chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
+ sndcmd = 0;
+ }
+ chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
+ return sndcmd;
+}
+
+/**
+ * nand_read_oob_syndrome - [REPLACABLE] OOB data read function for HW ECC
+ * with syndromes
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @page: page number to read
+ * @sndcmd: flag whether to issue read command or not
+ */
+static int nand_read_oob_syndrome(struct mtd_info *mtd, struct nand_chip *chip,
+ int page, int sndcmd)
+{
+ uint8_t *buf = chip->oob_poi;
+ int length = mtd->oobsize;
+ int chunk = chip->ecc.bytes + chip->ecc.prepad + chip->ecc.postpad;
+ int eccsize = chip->ecc.size;
+ uint8_t *bufpoi = buf;
+ int i, toread, sndrnd = 0, pos;
+
+ chip->cmdfunc(mtd, NAND_CMD_READ0, chip->ecc.size, page);
+ for (i = 0; i < chip->ecc.steps; i++) {
+ if (sndrnd) {
+ pos = eccsize + i * (eccsize + chunk);
+ if (mtd->writesize > 512)
+ chip->cmdfunc(mtd, NAND_CMD_RNDOUT, pos, -1);
+ else
+ chip->cmdfunc(mtd, NAND_CMD_READ0, pos, page);
+ } else
+ sndrnd = 1;
+ toread = min_t(int, length, chunk);
+ chip->read_buf(mtd, bufpoi, toread);
+ bufpoi += toread;
+ length -= toread;
+ }
+ if (length > 0)
+ chip->read_buf(mtd, bufpoi, length);
+
+ return 1;
+}
+
+/**
+ * nand_write_oob_std - [REPLACABLE] the most common OOB data write function
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @page: page number to write
+ */
+static int nand_write_oob_std(struct mtd_info *mtd, struct nand_chip *chip,
+ int page)
+{
+ int status = 0;
+ const uint8_t *buf = chip->oob_poi;
+ int length = mtd->oobsize;
+
+ chip->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page);
+ chip->write_buf(mtd, buf, length);
+ /* Send command to program the OOB data */
+ chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
+
+ status = chip->waitfunc(mtd, chip);
+
+ return status;
+}
+
+/**
+ * nand_write_oob_syndrome - [REPLACABLE] OOB data write function for HW ECC
+ * with syndrome - only for large page flash !
+ * @mtd: mtd info structure
+ * @chip: nand chip info structure
+ * @page: page number to write
+ */
+static int nand_write_oob_syndrome(struct mtd_info *mtd,
+ struct nand_chip *chip, int page)
+{
+ int chunk = chip->ecc.bytes + chip->ecc.prepad + chip->ecc.postpad;
+ int eccsize = chip->ecc.size, length = mtd->oobsize;
+ int i, len, pos, status = 0, sndcmd = 0, steps = chip->ecc.steps;
+ const uint8_t *bufpoi = chip->oob_poi;
+
+ /*
+ * data-ecc-data-ecc ... ecc-oob
+ * or
+ * data-pad-ecc-pad-data-pad .... ecc-pad-oob
+ */
+ if (!chip->ecc.prepad && !chip->ecc.postpad) {
+ pos = steps * (eccsize + chunk);
+ steps = 0;
+ } else
+ pos = eccsize + chunk;
+
+ chip->cmdfunc(mtd, NAND_CMD_SEQIN, pos, page);
+ for (i = 0; i < steps; i++) {
+ if (sndcmd) {
+ if (mtd->writesize <= 512) {
+ uint32_t fill = 0xFFFFFFFF;
+
+ len = eccsize;
+ while (len > 0) {
+ int num = min_t(int, len, 4);
+ chip->write_buf(mtd, (uint8_t *)&fill,
+ num);
+ len -= num;
+ }
+ } else {
+ pos = eccsize + i * (eccsize + chunk);
+ chip->cmdfunc(mtd, NAND_CMD_RNDIN, pos, -1);
+ }
+ } else
+ sndcmd = 1;
+ len = min_t(int, length, chunk);
+ chip->write_buf(mtd, bufpoi, len);
+ bufpoi += len;
+ length -= len;
+ }
+ if (length > 0)
+ chip->write_buf(mtd, bufpoi, length);
+
+ chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
+ status = chip->waitfunc(mtd, chip);
+
+ return status & NAND_STATUS_FAIL ? -EIO : 0;
+}
+
+/**
* nand_do_read_oob - [Intern] NAND read out-of-band
* @mtd: MTD device structure
* @from: offset to read from
@@ -1094,11 +1249,11 @@ static int nand_read(struct mtd_info *mtd, loff_t from, size_t len,
static int nand_do_read_oob(struct mtd_info *mtd, loff_t from,
struct mtd_oob_ops *ops)
{
- int col, page, realpage, chipnr, sndcmd = 1;
+ int page, realpage, chipnr, sndcmd = 1;
struct nand_chip *chip = mtd->priv;
int blkcheck = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1;
- int direct, bytes, readlen = ops->len;
- uint8_t *bufpoi, *buf = ops->oobbuf;
+ int readlen = ops->len;
+ uint8_t *buf = ops->oobbuf;
DEBUG(MTD_DEBUG_LEVEL3, "nand_read_oob: from = 0x%08Lx, len = %i\n",
(unsigned long long)from, readlen);
@@ -1110,29 +1265,11 @@ static int nand_do_read_oob(struct mtd_info *mtd, loff_t from,
realpage = (int)(from >> chip->page_shift);
page = realpage & chip->pagemask;
- if (ops->mode != MTD_OOB_AUTO) {
- col = ops->ooboffs;
- direct = 1;
- } else {
- col = 0;
- direct = 0;
- }
+ chip->oob_poi = chip->buffers.oobrbuf;
while(1) {
- bytes = direct ? ops->ooblen : mtd->oobsize;
- bufpoi = direct ? buf : chip->buffers.oobrbuf;
-
- if (likely(sndcmd)) {
- chip->cmdfunc(mtd, NAND_CMD_READOOB, col, page);
- sndcmd = 0;
- }
-
- chip->read_buf(mtd, bufpoi, bytes);
-
- if (unlikely(!direct))
- buf = nand_transfer_oob(chip, buf, ops);
- else
- buf += ops->ooblen;
+ sndcmd = chip->ecc.read_oob(mtd, chip, page, sndcmd);
+ buf = nand_transfer_oob(chip, buf, ops);
readlen -= ops->ooblen;
if (!readlen)
@@ -1365,7 +1502,7 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
if (!cached || !(chip->options & NAND_CACHEPRG)) {
chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
- status = chip->waitfunc(mtd, chip, FL_WRITING);
+ status = chip->waitfunc(mtd, chip);
/*
* See if operation failed and additional status checks are
* available
@@ -1378,7 +1515,7 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
return -EIO;
} else {
chip->cmdfunc(mtd, NAND_CMD_CACHEDPROG, -1, -1);
- status = chip->waitfunc(mtd, chip, FL_WRITING);
+ status = chip->waitfunc(mtd, chip);
}
#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
@@ -1411,11 +1548,25 @@ static uint8_t *nand_fill_oob(struct nand_chip *chip, uint8_t *oob,
case MTD_OOB_AUTO: {
struct nand_oobfree *free = chip->ecc.layout->oobfree;
- size_t bytes;
+ uint32_t boffs = 0, woffs = ops->ooboffs;
+ size_t bytes = 0;
for(; free->length && len; free++, len -= bytes) {
- bytes = min_t(size_t, len, free->length);
- memcpy(chip->oob_poi + free->offset, oob, bytes);
+ /* Write request not from offset 0 ? */
+ if (unlikely(woffs)) {
+ if (woffs >= free->length) {
+ woffs -= free->length;
+ continue;
+ }
+ boffs = free->offset + woffs;
+ bytes = min_t(size_t, len,
+ (free->length - woffs));
+ woffs = 0;
+ } else {
+ bytes = min_t(size_t, len, free->length);
+ boffs = free->offset;
+ }
+ memcpy(chip->oob_poi + woffs, oob, bytes);
oob += bytes;
}
return oob;
@@ -1532,7 +1683,7 @@ static int nand_write(struct mtd_info *mtd, loff_t to, size_t len,
if (!len)
return 0;
- nand_get_device(chip, mtd, FL_READING);
+ nand_get_device(chip, mtd, FL_WRITING);
chip->ops.len = len;
chip->ops.datbuf = (uint8_t *)buf;
@@ -1592,48 +1743,18 @@ static int nand_do_write_oob(struct mtd_info *mtd, loff_t to,
if (page == chip->pagebuf)
chip->pagebuf = -1;
- if (ops->mode == MTD_OOB_AUTO || NAND_MUST_PAD(chip)) {
- chip->oob_poi = chip->buffers.oobwbuf;
- memset(chip->oob_poi, 0xff, mtd->oobsize);
- nand_fill_oob(chip, ops->oobbuf, ops);
- chip->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize,
- page & chip->pagemask);
- chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
- memset(chip->oob_poi, 0xff, mtd->oobsize);
- } else {
- chip->cmdfunc(mtd, NAND_CMD_SEQIN,
- mtd->writesize + ops->ooboffs,
- page & chip->pagemask);
- chip->write_buf(mtd, ops->oobbuf, ops->len);
- }
-
- /* Send command to program the OOB data */
- chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
+ chip->oob_poi = chip->buffers.oobwbuf;
+ memset(chip->oob_poi, 0xff, mtd->oobsize);
+ nand_fill_oob(chip, ops->oobbuf, ops);
+ status = chip->ecc.write_oob(mtd, chip, page & chip->pagemask);
+ memset(chip->oob_poi, 0xff, mtd->oobsize);
- status = chip->waitfunc(mtd, chip, FL_WRITING);
+ if (status)
+ return status;
- /* See if device thinks it succeeded */
- if (status & NAND_STATUS_FAIL) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: "
- "Failed write, page 0x%08x\n", page);
- return -EIO;
- }
ops->retlen = ops->len;
-#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
- if (ops->mode != MTD_OOB_AUTO) {
- /* Send command to read back the data */
- chip->cmdfunc(mtd, NAND_CMD_READOOB, ops->ooboffs,
- page & chip->pagemask);
-
- if (chip->verify_buf(mtd, ops->oobbuf, ops->len)) {
- DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: "
- "Failed write verify, page 0x%08x\n", page);
- return -EIO;
- }
- }
-#endif
- return 0;
+ return 0;
}
/**
@@ -1659,7 +1780,7 @@ static int nand_write_oob(struct mtd_info *mtd, loff_t to,
return -EINVAL;
}
- nand_get_device(chip, mtd, FL_READING);
+ nand_get_device(chip, mtd, FL_WRITING);
switch(ops->mode) {
case MTD_OOB_PLACE:
@@ -1833,7 +1954,7 @@ int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr,
chip->erase_cmd(mtd, page & chip->pagemask);
- status = chip->waitfunc(mtd, chip, FL_ERASING);
+ status = chip->waitfunc(mtd, chip);
/*
* See if operation failed and additional status checks are
@@ -2265,6 +2386,10 @@ int nand_scan(struct mtd_info *mtd, int maxchips)
chip->ecc.read_page = nand_read_page_hwecc;
if (!chip->ecc.write_page)
chip->ecc.write_page = nand_write_page_hwecc;
+ if (!chip->ecc.read_oob)
+ chip->ecc.read_oob = nand_read_oob_std;
+ if (!chip->ecc.write_oob)
+ chip->ecc.write_oob = nand_write_oob_std;
case NAND_ECC_HW_SYNDROME:
if (!chip->ecc.calculate || !chip->ecc.correct ||
@@ -2278,6 +2403,10 @@ int nand_scan(struct mtd_info *mtd, int maxchips)
chip->ecc.read_page = nand_read_page_syndrome;
if (!chip->ecc.write_page)
chip->ecc.write_page = nand_write_page_syndrome;
+ if (!chip->ecc.read_oob)
+ chip->ecc.read_oob = nand_read_oob_syndrome;
+ if (!chip->ecc.write_oob)
+ chip->ecc.write_oob = nand_write_oob_syndrome;
if (mtd->writesize >= chip->ecc.size)
break;
@@ -2291,6 +2420,8 @@ int nand_scan(struct mtd_info *mtd, int maxchips)
chip->ecc.correct = nand_correct_data;
chip->ecc.read_page = nand_read_page_swecc;
chip->ecc.write_page = nand_write_page_swecc;
+ chip->ecc.read_oob = nand_read_oob_std;
+ chip->ecc.write_oob = nand_write_oob_std;
chip->ecc.size = 256;
chip->ecc.bytes = 3;
break;
@@ -2300,6 +2431,8 @@ int nand_scan(struct mtd_info *mtd, int maxchips)
"This is not recommended !!\n");
chip->ecc.read_page = nand_read_page_raw;
chip->ecc.write_page = nand_write_page_raw;
+ chip->ecc.read_oob = nand_read_oob_std;
+ chip->ecc.write_oob = nand_write_oob_std;
chip->ecc.size = mtd->writesize;
chip->ecc.bytes = 0;
break;
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index bf2ce68901f5..a30969eb9afe 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -63,18 +63,21 @@ extern void nand_release (struct mtd_info *mtd);
*/
#define NAND_CMD_READ0 0
#define NAND_CMD_READ1 1
+#define NAND_CMD_RNDOUT 5
#define NAND_CMD_PAGEPROG 0x10
#define NAND_CMD_READOOB 0x50
#define NAND_CMD_ERASE1 0x60
#define NAND_CMD_STATUS 0x70
#define NAND_CMD_STATUS_MULTI 0x71
#define NAND_CMD_SEQIN 0x80
+#define NAND_CMD_RNDIN 0x85
#define NAND_CMD_READID 0x90
#define NAND_CMD_ERASE2 0xd0
#define NAND_CMD_RESET 0xff
/* Extended commands for large page devices */
#define NAND_CMD_READSTART 0x30
+#define NAND_CMD_RNDOUTSTART 0xE0
#define NAND_CMD_CACHEDPROG 0x15
/* Extended commands for AG-AND device */
@@ -250,6 +253,13 @@ struct nand_ecc_ctrl {
void (*write_page)(struct mtd_info *mtd,
struct nand_chip *chip,
const uint8_t *buf);
+ int (*read_oob)(struct mtd_info *mtd,
+ struct nand_chip *chip,
+ int page,
+ int sndcmd);
+ int (*write_oob)(struct mtd_info *mtd,
+ struct nand_chip *chip,
+ int page);
};
/**
@@ -339,7 +349,7 @@ struct nand_chip {
unsigned int ctrl);
int (*dev_ready)(struct mtd_info *mtd);
void (*cmdfunc)(struct mtd_info *mtd, unsigned command, int column, int page_addr);
- int (*waitfunc)(struct mtd_info *mtd, struct nand_chip *this, int state);
+ int (*waitfunc)(struct mtd_info *mtd, struct nand_chip *this);
void (*erase_cmd)(struct mtd_info *mtd, int page);
int (*scan_bbt)(struct mtd_info *mtd);
int (*errstat)(struct mtd_info *mtd, struct nand_chip *this, int state, int status, int page);