* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
- *
- * $Id: nandsim.c,v 1.8 2005/03/19 15:33:56 dedekind Exp $
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/vmalloc.h>
+#include <asm/div64.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>
#include <linux/delay.h>
+#include <linux/list.h>
+#include <linux/random.h>
+#include <asm/div64.h>
/* Default simulator parameters values */
#if !defined(CONFIG_NANDSIM_FIRST_ID_BYTE) || \
static uint do_delays = CONFIG_NANDSIM_DO_DELAYS;
static uint log = CONFIG_NANDSIM_LOG;
static uint dbg = CONFIG_NANDSIM_DBG;
+static unsigned long parts[MAX_MTD_DEVICES];
+static unsigned int parts_num;
+static char *badblocks = NULL;
+static char *weakblocks = NULL;
+static char *weakpages = NULL;
+static unsigned int bitflips = 0;
+static char *gravepages = NULL;
+static unsigned int rptwear = 0;
+static unsigned int overridesize = 0;
module_param(first_id_byte, uint, 0400);
module_param(second_id_byte, uint, 0400);
module_param(do_delays, uint, 0400);
module_param(log, uint, 0400);
module_param(dbg, uint, 0400);
-
-MODULE_PARM_DESC(first_id_byte, "The fist byte returned by NAND Flash 'read ID' command (manufaturer ID)");
+module_param_array(parts, ulong, &parts_num, 0400);
+module_param(badblocks, charp, 0400);
+module_param(weakblocks, charp, 0400);
+module_param(weakpages, charp, 0400);
+module_param(bitflips, uint, 0400);
+module_param(gravepages, charp, 0400);
+module_param(rptwear, uint, 0400);
+module_param(overridesize, uint, 0400);
+
+MODULE_PARM_DESC(first_id_byte, "The first byte returned by NAND Flash 'read ID' command (manufacturer ID)");
MODULE_PARM_DESC(second_id_byte, "The second byte returned by NAND Flash 'read ID' command (chip ID)");
MODULE_PARM_DESC(third_id_byte, "The third byte returned by NAND Flash 'read ID' command");
MODULE_PARM_DESC(fourth_id_byte, "The fourth byte returned by NAND Flash 'read ID' command");
MODULE_PARM_DESC(do_delays, "Simulate NAND delays using busy-waits if not zero");
MODULE_PARM_DESC(log, "Perform logging if not zero");
MODULE_PARM_DESC(dbg, "Output debug information if not zero");
+MODULE_PARM_DESC(parts, "Partition sizes (in erase blocks) separated by commas");
+/* Page and erase block positions for the following parameters are independent of any partitions */
+MODULE_PARM_DESC(badblocks, "Erase blocks that are initially marked bad, separated by commas");
+MODULE_PARM_DESC(weakblocks, "Weak erase blocks [: remaining erase cycles (defaults to 3)]"
+ " separated by commas e.g. 113:2 means eb 113"
+ " can be erased only twice before failing");
+MODULE_PARM_DESC(weakpages, "Weak pages [: maximum writes (defaults to 3)]"
+ " separated by commas e.g. 1401:2 means page 1401"
+ " can be written only twice before failing");
+MODULE_PARM_DESC(bitflips, "Maximum number of random bit flips per page (zero by default)");
+MODULE_PARM_DESC(gravepages, "Pages that lose data [: maximum reads (defaults to 3)]"
+ " separated by commas e.g. 1401:2 means page 1401"
+ " can be read only twice before failing");
+MODULE_PARM_DESC(rptwear, "Number of erases inbetween reporting wear, if not zero");
+MODULE_PARM_DESC(overridesize, "Specifies the NAND Flash size overriding the ID bytes. "
+ "The size is specified in erase blocks and as the exponent of a power of two"
+ " e.g. 5 means a size of 32 erase blocks");
/* The largest possible page size */
#define NS_LARGEST_PAGE_SIZE 2048
#define NS_DBG(args...) \
do { if (dbg) printk(KERN_DEBUG NS_OUTPUT_PREFIX " debug: " args); } while(0)
#define NS_WARN(args...) \
- do { printk(KERN_WARNING NS_OUTPUT_PREFIX " warnig: " args); } while(0)
+ do { printk(KERN_WARNING NS_OUTPUT_PREFIX " warning: " args); } while(0)
#define NS_ERR(args...) \
- do { printk(KERN_ERR NS_OUTPUT_PREFIX " errorr: " args); } while(0)
+ do { printk(KERN_ERR NS_OUTPUT_PREFIX " error: " args); } while(0)
+#define NS_INFO(args...) \
+ do { printk(KERN_INFO NS_OUTPUT_PREFIX " " args); } while(0)
/* Busy-wait delay macros (microseconds, milliseconds) */
#define NS_UDELAY(us) \
#define STATE_CMD_READID 0x0000000A /* read ID */
#define STATE_CMD_ERASE2 0x0000000B /* sector erase second command */
#define STATE_CMD_RESET 0x0000000C /* reset */
+#define STATE_CMD_RNDOUT 0x0000000D /* random output command */
+#define STATE_CMD_RNDOUTSTART 0x0000000E /* random output start command */
#define STATE_CMD_MASK 0x0000000F /* command states mask */
-/* After an addres is input, the simulator goes to one of these states */
+/* After an address is input, the simulator goes to one of these states */
#define STATE_ADDR_PAGE 0x00000010 /* full (row, column) address is accepted */
#define STATE_ADDR_SEC 0x00000020 /* sector address was accepted */
-#define STATE_ADDR_ZERO 0x00000030 /* one byte zero address was accepted */
-#define STATE_ADDR_MASK 0x00000030 /* address states mask */
+#define STATE_ADDR_COLUMN 0x00000030 /* column address was accepted */
+#define STATE_ADDR_ZERO 0x00000040 /* one byte zero address was accepted */
+#define STATE_ADDR_MASK 0x00000070 /* address states mask */
/* Durind data input/output the simulator is in these states */
#define STATE_DATAIN 0x00000100 /* waiting for data input */
#define ACTION_OOBOFF 0x00600000 /* add to address OOB offset */
#define ACTION_MASK 0x00700000 /* action mask */
-#define NS_OPER_NUM 12 /* Number of operations supported by the simulator */
+#define NS_OPER_NUM 13 /* Number of operations supported by the simulator */
#define NS_OPER_STATES 6 /* Maximum number of states in operation */
#define OPT_ANY 0xFFFFFFFF /* any chip supports this operation */
* The structure which describes all the internal simulator data.
*/
struct nandsim {
- struct mtd_partition part;
+ struct mtd_partition partitions[MAX_MTD_DEVICES];
+ unsigned int nbparts;
uint busw; /* flash chip bus width (8 or 16) */
u_char ids[4]; /* chip's ID bytes */
/* NAND flash "geometry" */
struct nandsin_geometry {
- uint32_t totsz; /* total flash size, bytes */
+ uint64_t totsz; /* total flash size, bytes */
uint32_t secsz; /* flash sector (erase block) size, bytes */
uint pgsz; /* NAND flash page size, bytes */
uint oobsz; /* page OOB area size, bytes */
- uint32_t totszoob; /* total flash size including OOB, bytes */
+ uint64_t totszoob; /* total flash size including OOB, bytes */
uint pgszoob; /* page size including OOB , bytes*/
uint secszoob; /* sector size including OOB, bytes */
uint pgnum; /* total number of pages */
{OPT_ANY, {STATE_CMD_READID, STATE_ADDR_ZERO, STATE_DATAOUT_ID, STATE_READY}},
/* Large page devices read page */
{OPT_LARGEPAGE, {STATE_CMD_READ0, STATE_ADDR_PAGE, STATE_CMD_READSTART | ACTION_CPY,
- STATE_DATAOUT, STATE_READY}}
+ STATE_DATAOUT, STATE_READY}},
+ /* Large page devices random page read */
+ {OPT_LARGEPAGE, {STATE_CMD_RNDOUT, STATE_ADDR_COLUMN, STATE_CMD_RNDOUTSTART | ACTION_CPY,
+ STATE_DATAOUT, STATE_READY}},
+};
+
+struct weak_block {
+ struct list_head list;
+ unsigned int erase_block_no;
+ unsigned int max_erases;
+ unsigned int erases_done;
+};
+
+static LIST_HEAD(weak_blocks);
+
+struct weak_page {
+ struct list_head list;
+ unsigned int page_no;
+ unsigned int max_writes;
+ unsigned int writes_done;
+};
+
+static LIST_HEAD(weak_pages);
+
+struct grave_page {
+ struct list_head list;
+ unsigned int page_no;
+ unsigned int max_reads;
+ unsigned int reads_done;
};
+static LIST_HEAD(grave_pages);
+
+static unsigned long *erase_block_wear = NULL;
+static unsigned int wear_eb_count = 0;
+static unsigned long total_wear = 0;
+static unsigned int rptwear_cnt = 0;
+
/* MTD structure for NAND controller */
static struct mtd_info *nsmtd;
}
}
+static char *get_partition_name(int i)
+{
+ char buf[64];
+ sprintf(buf, "NAND simulator partition %d", i);
+ return kstrdup(buf, GFP_KERNEL);
+}
+
+static u_int64_t divide(u_int64_t n, u_int32_t d)
+{
+ do_div(n, d);
+ return n;
+}
+
/*
* Initialize the nandsim structure.
*
{
struct nand_chip *chip = (struct nand_chip *)mtd->priv;
struct nandsim *ns = (struct nandsim *)(chip->priv);
- int i;
+ int i, ret = 0;
+ u_int64_t remains;
+ u_int64_t next_offset;
if (NS_IS_INITIALIZED(ns)) {
NS_ERR("init_nandsim: nandsim is already initialized\n");
ns->geom.oobsz = mtd->oobsize;
ns->geom.secsz = mtd->erasesize;
ns->geom.pgszoob = ns->geom.pgsz + ns->geom.oobsz;
- ns->geom.pgnum = ns->geom.totsz / ns->geom.pgsz;
- ns->geom.totszoob = ns->geom.totsz + ns->geom.pgnum * ns->geom.oobsz;
+ ns->geom.pgnum = divide(ns->geom.totsz, ns->geom.pgsz);
+ ns->geom.totszoob = ns->geom.totsz + (uint64_t)ns->geom.pgnum * ns->geom.oobsz;
ns->geom.secshift = ffs(ns->geom.secsz) - 1;
ns->geom.pgshift = chip->page_shift;
ns->geom.oobshift = ffs(ns->geom.oobsz) - 1;
}
if (ns->options & OPT_SMALLPAGE) {
- if (ns->geom.totsz < (64 << 20)) {
+ if (ns->geom.totsz <= (32 << 20)) {
ns->geom.pgaddrbytes = 3;
ns->geom.secaddrbytes = 2;
} else {
}
}
+ /* Fill the partition_info structure */
+ if (parts_num > ARRAY_SIZE(ns->partitions)) {
+ NS_ERR("too many partitions.\n");
+ ret = -EINVAL;
+ goto error;
+ }
+ remains = ns->geom.totsz;
+ next_offset = 0;
+ for (i = 0; i < parts_num; ++i) {
+ u_int64_t part_sz = (u_int64_t)parts[i] * ns->geom.secsz;
+
+ if (!part_sz || part_sz > remains) {
+ NS_ERR("bad partition size.\n");
+ ret = -EINVAL;
+ goto error;
+ }
+ ns->partitions[i].name = get_partition_name(i);
+ ns->partitions[i].offset = next_offset;
+ ns->partitions[i].size = part_sz;
+ next_offset += ns->partitions[i].size;
+ remains -= ns->partitions[i].size;
+ }
+ ns->nbparts = parts_num;
+ if (remains) {
+ if (parts_num + 1 > ARRAY_SIZE(ns->partitions)) {
+ NS_ERR("too many partitions.\n");
+ ret = -EINVAL;
+ goto error;
+ }
+ ns->partitions[i].name = get_partition_name(i);
+ ns->partitions[i].offset = next_offset;
+ ns->partitions[i].size = remains;
+ ns->nbparts += 1;
+ }
+
/* Detect how many ID bytes the NAND chip outputs */
for (i = 0; nand_flash_ids[i].name != NULL; i++) {
if (second_id_byte != nand_flash_ids[i].id)
if (ns->busw == 16)
NS_WARN("16-bit flashes support wasn't tested\n");
- printk("flash size: %u MiB\n", ns->geom.totsz >> 20);
+ printk("flash size: %llu MiB\n", ns->geom.totsz >> 20);
printk("page size: %u bytes\n", ns->geom.pgsz);
printk("OOB area size: %u bytes\n", ns->geom.oobsz);
printk("sector size: %u KiB\n", ns->geom.secsz >> 10);
printk("bits in sector size: %u\n", ns->geom.secshift);
printk("bits in page size: %u\n", ns->geom.pgshift);
printk("bits in OOB size: %u\n", ns->geom.oobshift);
- printk("flash size with OOB: %u KiB\n", ns->geom.totszoob >> 10);
+ printk("flash size with OOB: %llu KiB\n", ns->geom.totszoob >> 10);
printk("page address bytes: %u\n", ns->geom.pgaddrbytes);
printk("sector address bytes: %u\n", ns->geom.secaddrbytes);
printk("options: %#x\n", ns->options);
- if (alloc_device(ns) != 0)
+ if ((ret = alloc_device(ns)) != 0)
goto error;
/* Allocate / initialize the internal buffer */
if (!ns->buf.byte) {
NS_ERR("init_nandsim: unable to allocate %u bytes for the internal buffer\n",
ns->geom.pgszoob);
+ ret = -ENOMEM;
goto error;
}
memset(ns->buf.byte, 0xFF, ns->geom.pgszoob);
- /* Fill the partition_info structure */
- ns->part.name = "NAND simulator partition";
- ns->part.offset = 0;
- ns->part.size = ns->geom.totsz;
-
return 0;
error:
free_device(ns);
- return -ENOMEM;
+ return ret;
}
/*
return;
}
+static int parse_badblocks(struct nandsim *ns, struct mtd_info *mtd)
+{
+ char *w;
+ int zero_ok;
+ unsigned int erase_block_no;
+ loff_t offset;
+
+ if (!badblocks)
+ return 0;
+ w = badblocks;
+ do {
+ zero_ok = (*w == '0' ? 1 : 0);
+ erase_block_no = simple_strtoul(w, &w, 0);
+ if (!zero_ok && !erase_block_no) {
+ NS_ERR("invalid badblocks.\n");
+ return -EINVAL;
+ }
+ offset = erase_block_no * ns->geom.secsz;
+ if (mtd->block_markbad(mtd, offset)) {
+ NS_ERR("invalid badblocks.\n");
+ return -EINVAL;
+ }
+ if (*w == ',')
+ w += 1;
+ } while (*w);
+ return 0;
+}
+
+static int parse_weakblocks(void)
+{
+ char *w;
+ int zero_ok;
+ unsigned int erase_block_no;
+ unsigned int max_erases;
+ struct weak_block *wb;
+
+ if (!weakblocks)
+ return 0;
+ w = weakblocks;
+ do {
+ zero_ok = (*w == '0' ? 1 : 0);
+ erase_block_no = simple_strtoul(w, &w, 0);
+ if (!zero_ok && !erase_block_no) {
+ NS_ERR("invalid weakblocks.\n");
+ return -EINVAL;
+ }
+ max_erases = 3;
+ if (*w == ':') {
+ w += 1;
+ max_erases = simple_strtoul(w, &w, 0);
+ }
+ if (*w == ',')
+ w += 1;
+ wb = kzalloc(sizeof(*wb), GFP_KERNEL);
+ if (!wb) {
+ NS_ERR("unable to allocate memory.\n");
+ return -ENOMEM;
+ }
+ wb->erase_block_no = erase_block_no;
+ wb->max_erases = max_erases;
+ list_add(&wb->list, &weak_blocks);
+ } while (*w);
+ return 0;
+}
+
+static int erase_error(unsigned int erase_block_no)
+{
+ struct weak_block *wb;
+
+ list_for_each_entry(wb, &weak_blocks, list)
+ if (wb->erase_block_no == erase_block_no) {
+ if (wb->erases_done >= wb->max_erases)
+ return 1;
+ wb->erases_done += 1;
+ return 0;
+ }
+ return 0;
+}
+
+static int parse_weakpages(void)
+{
+ char *w;
+ int zero_ok;
+ unsigned int page_no;
+ unsigned int max_writes;
+ struct weak_page *wp;
+
+ if (!weakpages)
+ return 0;
+ w = weakpages;
+ do {
+ zero_ok = (*w == '0' ? 1 : 0);
+ page_no = simple_strtoul(w, &w, 0);
+ if (!zero_ok && !page_no) {
+ NS_ERR("invalid weakpagess.\n");
+ return -EINVAL;
+ }
+ max_writes = 3;
+ if (*w == ':') {
+ w += 1;
+ max_writes = simple_strtoul(w, &w, 0);
+ }
+ if (*w == ',')
+ w += 1;
+ wp = kzalloc(sizeof(*wp), GFP_KERNEL);
+ if (!wp) {
+ NS_ERR("unable to allocate memory.\n");
+ return -ENOMEM;
+ }
+ wp->page_no = page_no;
+ wp->max_writes = max_writes;
+ list_add(&wp->list, &weak_pages);
+ } while (*w);
+ return 0;
+}
+
+static int write_error(unsigned int page_no)
+{
+ struct weak_page *wp;
+
+ list_for_each_entry(wp, &weak_pages, list)
+ if (wp->page_no == page_no) {
+ if (wp->writes_done >= wp->max_writes)
+ return 1;
+ wp->writes_done += 1;
+ return 0;
+ }
+ return 0;
+}
+
+static int parse_gravepages(void)
+{
+ char *g;
+ int zero_ok;
+ unsigned int page_no;
+ unsigned int max_reads;
+ struct grave_page *gp;
+
+ if (!gravepages)
+ return 0;
+ g = gravepages;
+ do {
+ zero_ok = (*g == '0' ? 1 : 0);
+ page_no = simple_strtoul(g, &g, 0);
+ if (!zero_ok && !page_no) {
+ NS_ERR("invalid gravepagess.\n");
+ return -EINVAL;
+ }
+ max_reads = 3;
+ if (*g == ':') {
+ g += 1;
+ max_reads = simple_strtoul(g, &g, 0);
+ }
+ if (*g == ',')
+ g += 1;
+ gp = kzalloc(sizeof(*gp), GFP_KERNEL);
+ if (!gp) {
+ NS_ERR("unable to allocate memory.\n");
+ return -ENOMEM;
+ }
+ gp->page_no = page_no;
+ gp->max_reads = max_reads;
+ list_add(&gp->list, &grave_pages);
+ } while (*g);
+ return 0;
+}
+
+static int read_error(unsigned int page_no)
+{
+ struct grave_page *gp;
+
+ list_for_each_entry(gp, &grave_pages, list)
+ if (gp->page_no == page_no) {
+ if (gp->reads_done >= gp->max_reads)
+ return 1;
+ gp->reads_done += 1;
+ return 0;
+ }
+ return 0;
+}
+
+static void free_lists(void)
+{
+ struct list_head *pos, *n;
+ list_for_each_safe(pos, n, &weak_blocks) {
+ list_del(pos);
+ kfree(list_entry(pos, struct weak_block, list));
+ }
+ list_for_each_safe(pos, n, &weak_pages) {
+ list_del(pos);
+ kfree(list_entry(pos, struct weak_page, list));
+ }
+ list_for_each_safe(pos, n, &grave_pages) {
+ list_del(pos);
+ kfree(list_entry(pos, struct grave_page, list));
+ }
+ kfree(erase_block_wear);
+}
+
+static int setup_wear_reporting(struct mtd_info *mtd)
+{
+ size_t mem;
+
+ if (!rptwear)
+ return 0;
+ wear_eb_count = divide(mtd->size, mtd->erasesize);
+ mem = wear_eb_count * sizeof(unsigned long);
+ if (mem / sizeof(unsigned long) != wear_eb_count) {
+ NS_ERR("Too many erase blocks for wear reporting\n");
+ return -ENOMEM;
+ }
+ erase_block_wear = kzalloc(mem, GFP_KERNEL);
+ if (!erase_block_wear) {
+ NS_ERR("Too many erase blocks for wear reporting\n");
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+static void update_wear(unsigned int erase_block_no)
+{
+ unsigned long wmin = -1, wmax = 0, avg;
+ unsigned long deciles[10], decile_max[10], tot = 0;
+ unsigned int i;
+
+ if (!erase_block_wear)
+ return;
+ total_wear += 1;
+ if (total_wear == 0)
+ NS_ERR("Erase counter total overflow\n");
+ erase_block_wear[erase_block_no] += 1;
+ if (erase_block_wear[erase_block_no] == 0)
+ NS_ERR("Erase counter overflow for erase block %u\n", erase_block_no);
+ rptwear_cnt += 1;
+ if (rptwear_cnt < rptwear)
+ return;
+ rptwear_cnt = 0;
+ /* Calc wear stats */
+ for (i = 0; i < wear_eb_count; ++i) {
+ unsigned long wear = erase_block_wear[i];
+ if (wear < wmin)
+ wmin = wear;
+ if (wear > wmax)
+ wmax = wear;
+ tot += wear;
+ }
+ for (i = 0; i < 9; ++i) {
+ deciles[i] = 0;
+ decile_max[i] = (wmax * (i + 1) + 5) / 10;
+ }
+ deciles[9] = 0;
+ decile_max[9] = wmax;
+ for (i = 0; i < wear_eb_count; ++i) {
+ int d;
+ unsigned long wear = erase_block_wear[i];
+ for (d = 0; d < 10; ++d)
+ if (wear <= decile_max[d]) {
+ deciles[d] += 1;
+ break;
+ }
+ }
+ avg = tot / wear_eb_count;
+ /* Output wear report */
+ NS_INFO("*** Wear Report ***\n");
+ NS_INFO("Total numbers of erases: %lu\n", tot);
+ NS_INFO("Number of erase blocks: %u\n", wear_eb_count);
+ NS_INFO("Average number of erases: %lu\n", avg);
+ NS_INFO("Maximum number of erases: %lu\n", wmax);
+ NS_INFO("Minimum number of erases: %lu\n", wmin);
+ for (i = 0; i < 10; ++i) {
+ unsigned long from = (i ? decile_max[i - 1] + 1 : 0);
+ if (from > decile_max[i])
+ continue;
+ NS_INFO("Number of ebs with erase counts from %lu to %lu : %lu\n",
+ from,
+ decile_max[i],
+ deciles[i]);
+ }
+ NS_INFO("*** End of Wear Report ***\n");
+}
+
/*
* Returns the string representation of 'state' state.
*/
return "STATE_CMD_ERASE2";
case STATE_CMD_RESET:
return "STATE_CMD_RESET";
+ case STATE_CMD_RNDOUT:
+ return "STATE_CMD_RNDOUT";
+ case STATE_CMD_RNDOUTSTART:
+ return "STATE_CMD_RNDOUTSTART";
case STATE_ADDR_PAGE:
return "STATE_ADDR_PAGE";
case STATE_ADDR_SEC:
return "STATE_ADDR_SEC";
case STATE_ADDR_ZERO:
return "STATE_ADDR_ZERO";
+ case STATE_ADDR_COLUMN:
+ return "STATE_ADDR_COLUMN";
case STATE_DATAIN:
return "STATE_DATAIN";
case STATE_DATAOUT:
switch (cmd) {
case NAND_CMD_READ0:
+ case NAND_CMD_READ1:
case NAND_CMD_READSTART:
case NAND_CMD_PAGEPROG:
case NAND_CMD_READOOB:
case NAND_CMD_READID:
case NAND_CMD_ERASE2:
case NAND_CMD_RESET:
- case NAND_CMD_READ1:
+ case NAND_CMD_RNDOUT:
+ case NAND_CMD_RNDOUTSTART:
return 0;
case NAND_CMD_STATUS_MULTI:
return STATE_CMD_ERASE2;
case NAND_CMD_RESET:
return STATE_CMD_RESET;
+ case NAND_CMD_RNDOUT:
+ return STATE_CMD_RNDOUT;
+ case NAND_CMD_RNDOUTSTART:
+ return STATE_CMD_RNDOUTSTART;
}
NS_ERR("get_state_by_command: unknown command, BUG\n");
NS_DBG("read_page: page %d not allocated\n", ns->regs.row);
memset(ns->buf.byte, 0xFF, num);
} else {
+ unsigned int page_no = ns->regs.row;
NS_DBG("read_page: page %d allocated, reading from %d\n",
ns->regs.row, ns->regs.column + ns->regs.off);
+ if (read_error(page_no)) {
+ int i;
+ memset(ns->buf.byte, 0xFF, num);
+ for (i = 0; i < num; ++i)
+ ns->buf.byte[i] = random32();
+ NS_WARN("simulating read error in page %u\n", page_no);
+ return;
+ }
memcpy(ns->buf.byte, NS_PAGE_BYTE_OFF(ns), num);
+ if (bitflips && random32() < (1 << 22)) {
+ int flips = 1;
+ if (bitflips > 1)
+ flips = (random32() % (int) bitflips) + 1;
+ while (flips--) {
+ int pos = random32() % (num * 8);
+ ns->buf.byte[pos / 8] ^= (1 << (pos % 8));
+ NS_WARN("read_page: flipping bit %d in page %d "
+ "reading from %d ecc: corrected=%u failed=%u\n",
+ pos, ns->regs.row, ns->regs.column + ns->regs.off,
+ nsmtd->ecc_stats.corrected, nsmtd->ecc_stats.failed);
+ }
+ }
}
}
mypage = NS_GET_PAGE(ns);
if (mypage->byte == NULL) {
NS_DBG("prog_page: allocating page %d\n", ns->regs.row);
- mypage->byte = kmalloc(ns->geom.pgszoob, GFP_KERNEL);
+ /*
+ * We allocate memory with GFP_NOFS because a flash FS may
+ * utilize this. If it is holding an FS lock, then gets here,
+ * then kmalloc runs writeback which goes to the FS again
+ * and deadlocks. This was seen in practice.
+ */
+ mypage->byte = kmalloc(ns->geom.pgszoob, GFP_NOFS);
if (mypage->byte == NULL) {
NS_ERR("prog_page: error allocating memory for page %d\n", ns->regs.row);
return -1;
{
int num;
int busdiv = ns->busw == 8 ? 1 : 2;
+ unsigned int erase_block_no, page_no;
action &= ACTION_MASK;
8 * (ns->geom.pgaddrbytes - ns->geom.secaddrbytes)) | ns->regs.column;
ns->regs.column = 0;
+ erase_block_no = ns->regs.row >> (ns->geom.secshift - ns->geom.pgshift);
+
NS_DBG("do_state_action: erase sector at address %#x, off = %d\n",
ns->regs.row, NS_RAW_OFFSET(ns));
- NS_LOG("erase sector %d\n", ns->regs.row >> (ns->geom.secshift - ns->geom.pgshift));
+ NS_LOG("erase sector %u\n", erase_block_no);
erase_sector(ns);
NS_MDELAY(erase_delay);
+ if (erase_block_wear)
+ update_wear(erase_block_no);
+
+ if (erase_error(erase_block_no)) {
+ NS_WARN("simulating erase failure in erase block %u\n", erase_block_no);
+ return -1;
+ }
+
break;
case ACTION_PRGPAGE:
if (prog_page(ns, num) == -1)
return -1;
+ page_no = ns->regs.row;
+
NS_DBG("do_state_action: copy %d bytes from int buf to (%#x, %#x), raw off = %d\n",
num, ns->regs.row, ns->regs.column, NS_RAW_OFFSET(ns) + ns->regs.off);
NS_LOG("programm page %d\n", ns->regs.row);
NS_UDELAY(programm_delay);
NS_UDELAY(output_cycle * ns->geom.pgsz / 1000 / busdiv);
+ if (write_error(page_no)) {
+ NS_WARN("simulating write failure in page %u\n", page_no);
+ return -1;
+ }
+
break;
case ACTION_ZEROOFF:
ns->regs.num = 1;
break;
+ case STATE_ADDR_COLUMN:
+ /* Column address is always 2 bytes */
+ ns->regs.num = ns->geom.pgaddrbytes - ns->geom.secaddrbytes;
+ break;
+
default:
NS_ERR("switch_state: BUG! unknown address state\n");
}
return;
}
- /*
- * Chip might still be in STATE_DATAOUT
- * (if OPT_AUTOINCR feature is supported), STATE_DATAOUT_STATUS or
- * STATE_DATAOUT_STATUS_M state. If so, switch state.
- */
+ /* Check that the command byte is correct */
+ if (check_command(byte)) {
+ NS_ERR("write_byte: unknown command %#x\n", (uint)byte);
+ return;
+ }
+
if (NS_STATE(ns->state) == STATE_DATAOUT_STATUS
|| NS_STATE(ns->state) == STATE_DATAOUT_STATUS_M
- || ((ns->options & OPT_AUTOINCR) && NS_STATE(ns->state) == STATE_DATAOUT))
+ || NS_STATE(ns->state) == STATE_DATAOUT) {
+ int row = ns->regs.row;
+
switch_state(ns);
+ if (byte == NAND_CMD_RNDOUT)
+ ns->regs.row = row;
+ }
/* Check if chip is expecting command */
if (NS_STATE(ns->nxstate) != STATE_UNKNOWN && !(ns->nxstate & STATE_CMD_MASK)) {
switch_to_ready_state(ns, NS_STATUS_FAILED(ns));
}
- /* Check that the command byte is correct */
- if (check_command(byte)) {
- NS_ERR("write_byte: unknown command %#x\n", (uint)byte);
- return;
- }
-
NS_DBG("command byte corresponding to %s state accepted\n",
get_state_name(get_state_by_command(byte)));
ns->regs.command = byte;
{
struct nand_chip *chip;
struct nandsim *nand;
- int retval = -ENOMEM;
+ int retval = -ENOMEM, i;
if (bus_width != 8 && bus_width != 16) {
NS_ERR("wrong bus width (%d), use only 8 or 16\n", bus_width);
chip->verify_buf = ns_nand_verify_buf;
chip->read_word = ns_nand_read_word;
chip->ecc.mode = NAND_ECC_SOFT;
+ /* The NAND_SKIP_BBTSCAN option is necessary for 'overridesize' */
+ /* and 'badblocks' parameters to work */
chip->options |= NAND_SKIP_BBTSCAN;
/*
nsmtd->owner = THIS_MODULE;
+ if ((retval = parse_weakblocks()) != 0)
+ goto error;
+
+ if ((retval = parse_weakpages()) != 0)
+ goto error;
+
+ if ((retval = parse_gravepages()) != 0)
+ goto error;
+
if ((retval = nand_scan(nsmtd, 1)) != 0) {
NS_ERR("can't register NAND Simulator\n");
if (retval > 0)
goto error;
}
- if ((retval = init_nandsim(nsmtd)) != 0) {
- NS_ERR("scan_bbt: can't initialize the nandsim structure\n");
- goto error;
+ if (overridesize) {
+ u_int64_t new_size = (u_int64_t)nsmtd->erasesize << overridesize;
+ if (new_size >> overridesize != nsmtd->erasesize) {
+ NS_ERR("overridesize is too big\n");
+ goto err_exit;
+ }
+ /* N.B. This relies on nand_scan not doing anything with the size before we change it */
+ nsmtd->size = new_size;
+ chip->chipsize = new_size;
+ chip->chip_shift = ffs(nsmtd->erasesize) + overridesize - 1;
+ chip->pagemask = (chip->chipsize >> chip->page_shift) - 1;
}
- if ((retval = nand_default_bbt(nsmtd)) != 0) {
- free_nandsim(nand);
- goto error;
- }
+ if ((retval = setup_wear_reporting(nsmtd)) != 0)
+ goto err_exit;
+
+ if ((retval = init_nandsim(nsmtd)) != 0)
+ goto err_exit;
- /* Register NAND as one big partition */
- add_mtd_partitions(nsmtd, &nand->part, 1);
+ if ((retval = parse_badblocks(nand, nsmtd)) != 0)
+ goto err_exit;
+
+ if ((retval = nand_default_bbt(nsmtd)) != 0)
+ goto err_exit;
+
+ /* Register NAND partitions */
+ if ((retval = add_mtd_partitions(nsmtd, &nand->partitions[0], nand->nbparts)) != 0)
+ goto err_exit;
return 0;
+err_exit:
+ free_nandsim(nand);
+ nand_release(nsmtd);
+ for (i = 0;i < ARRAY_SIZE(nand->partitions); ++i)
+ kfree(nand->partitions[i].name);
error:
kfree(nsmtd);
+ free_lists();
return retval;
}
static void __exit ns_cleanup_module(void)
{
struct nandsim *ns = (struct nandsim *)(((struct nand_chip *)nsmtd->priv)->priv);
+ int i;
free_nandsim(ns); /* Free nandsim private resources */
- nand_release(nsmtd); /* Unregisterd drived */
+ nand_release(nsmtd); /* Unregister driver */
+ for (i = 0;i < ARRAY_SIZE(ns->partitions); ++i)
+ kfree(ns->partitions[i].name);
kfree(nsmtd); /* Free other structures */
+ free_lists();
}
module_exit(ns_cleanup_module);
MODULE_LICENSE ("GPL");
MODULE_AUTHOR ("Artem B. Bityuckiy");
MODULE_DESCRIPTION ("The NAND flash simulator");
-
projects / linux-2.6-omap-h63xx.git / blobdiff