[PATCH 11/46] mtd: nandsim: Factor out nandsim parameters
Daniel Walter
dwalter at sigma-star.at
Wed Aug 31 00:28:18 PDT 2016
From: Richard Weinberger <richard at nod.at>
...such that we have a way to pass different
parameters to different instances.
Signed-off-by: Richard Weinberger <richard at nod.at>
---
drivers/mtd/nand/nandsim.c | 129 ++++++++++++++++++++++++++++++++-------------
1 file changed, 93 insertions(+), 36 deletions(-)
diff --git a/drivers/mtd/nand/nandsim.c b/drivers/mtd/nand/nandsim.c
index f26e983..ab4859d 100644
--- a/drivers/mtd/nand/nandsim.c
+++ b/drivers/mtd/nand/nandsim.c
@@ -289,6 +289,28 @@ MODULE_PARM_DESC(bch, "Enable BCH ecc and set how many bits should "
/* Maximum page cache pages needed to read or write a NAND page to the cache_file */
#define NS_MAX_HELD_PAGES 16
+struct nandsim_params {
+ unsigned int access_delay;
+ unsigned int program_delay;
+ unsigned int erase_delay;
+ unsigned int output_cycle;
+ unsigned int input_cycle;
+ unsigned int bus_width;
+ unsigned int do_delays;
+ unsigned long *parts;
+ unsigned int parts_num;
+ char *badblocks;
+ char *weakblocks;
+ char *weakpages;
+ unsigned int bitflips;
+ char *gravepages;
+ unsigned int overridesize;
+ char *cache_file;
+ unsigned int bbt;
+ unsigned int bch;
+ unsigned char *id_bytes;
+};
+
struct nandsim_debug_info {
struct dentry *dfs_root;
struct dentry *dfs_wear_report;
@@ -593,13 +615,13 @@ static void nandsim_debugfs_remove(struct nandsim *ns)
*
* RETURNS: 0 if success, -ENOMEM if memory alloc fails.
*/
-static int __init alloc_device(struct nandsim *ns)
+static int alloc_device(struct nandsim *ns, struct nandsim_params *nsparam)
{
struct file *cfile;
int i, err;
- if (cache_file) {
- cfile = filp_open(cache_file, O_CREAT | O_RDWR | O_LARGEFILE, 0600);
+ if (nsparam->cache_file) {
+ cfile = filp_open(nsparam->cache_file, O_CREAT | O_RDWR | O_LARGEFILE, 0600);
if (IS_ERR(cfile))
return PTR_ERR(cfile);
if (!(cfile->f_mode & FMODE_CAN_READ)) {
@@ -688,7 +710,7 @@ static char __init *get_partition_name(int i)
*
* RETURNS: 0 if success, -ERRNO if failure.
*/
-static int __init init_nandsim(struct mtd_info *mtd)
+static int init_nandsim(struct mtd_info *mtd, struct nandsim_params *nsparam)
{
struct nand_chip *chip = mtd_to_nand(mtd);
struct nandsim *ns = nand_get_controller_data(chip);
@@ -751,14 +773,14 @@ static int __init init_nandsim(struct mtd_info *mtd)
}
/* Fill the partition_info structure */
- if (parts_num > ARRAY_SIZE(ns->partitions)) {
+ if (nsparam->parts_num > ARRAY_SIZE(ns->partitions)) {
NS_ERR("too many partitions.\n");
return -EINVAL;
}
remains = ns->geom.totsz;
next_offset = 0;
- for (i = 0; i < parts_num; ++i) {
- uint64_t part_sz = (uint64_t)parts[i] * ns->geom.secsz;
+ for (i = 0; i < nsparam->parts_num; ++i) {
+ uint64_t part_sz = (uint64_t)nsparam->parts[i] * ns->geom.secsz;
if (!part_sz || part_sz > remains) {
NS_ERR("bad partition size.\n");
@@ -774,9 +796,9 @@ static int __init init_nandsim(struct mtd_info *mtd)
next_offset += ns->partitions[i].size;
remains -= ns->partitions[i].size;
}
- ns->nbparts = parts_num;
+ ns->nbparts = nsparam->parts_num;
if (remains) {
- if (parts_num + 1 > ARRAY_SIZE(ns->partitions)) {
+ if (nsparam->parts_num + 1 > ARRAY_SIZE(ns->partitions)) {
NS_ERR("too many partitions.\n");
return -EINVAL;
}
@@ -810,7 +832,7 @@ static int __init init_nandsim(struct mtd_info *mtd)
printk("sector address bytes: %u\n", ns->geom.secaddrbytes);
printk("options: %#x\n", ns->options);
- if ((ret = alloc_device(ns)) != 0)
+ if ((ret = alloc_device(ns, nsparam)) != 0)
return ret;
/* Allocate / initialize the internal buffer */
@@ -2289,15 +2311,16 @@ static struct miscdevice nandsim_ctrl_cdev = {
.fops = &nansim_ctrl_fops,
};
-static int __init ns_init_default(void)
+static int ns_new_instance(struct nandsim_params *nsparam)
{
struct nand_chip *chip;
struct nandsim *nand;
struct mtd_info *nsmtd;
int retval = -ENOMEM, i;
+ unsigned char *id_bytes = nsparam->id_bytes;
- if (bus_width != 8 && bus_width != 16) {
- NS_ERR("wrong bus width (%d), use only 8 or 16\n", bus_width);
+ if (nsparam->bus_width != 8 && nsparam->bus_width != 16) {
+ NS_ERR("wrong bus width (%d), use only 8 or 16\n", nsparam->bus_width);
return -EINVAL;
}
@@ -2334,7 +2357,7 @@ static int __init ns_init_default(void)
/* and 'badblocks' parameters to work */
chip->options |= NAND_SKIP_BBTSCAN;
- switch (bbt) {
+ switch (nsparam->bbt) {
case 2:
chip->bbt_options |= NAND_BBT_NO_OOB;
case 1:
@@ -2362,29 +2385,29 @@ static int __init ns_init_default(void)
nand->nxstate = STATE_UNKNOWN;
nand->options |= OPT_PAGE512; /* temporary value */
memcpy(nand->ids, id_bytes, sizeof(nand->ids));
- if (bus_width == 16) {
+ if (nsparam->bus_width == 16) {
nand->busw = 16;
chip->options |= NAND_BUSWIDTH_16;
}
nsmtd->owner = THIS_MODULE;
- if ((retval = parse_weakblocks(nand, weakblocks)) != 0)
+ if ((retval = parse_weakblocks(nand, nsparam->weakblocks)) != 0)
goto error;
- if ((retval = parse_weakpages(nand, weakpages)) != 0)
+ if ((retval = parse_weakpages(nand, nsparam->weakpages)) != 0)
goto error;
- if ((retval = parse_gravepages(nand, gravepages)) != 0)
+ if ((retval = parse_gravepages(nand, nsparam->gravepages)) != 0)
goto error;
- nand->do_delays = do_delays;
- nand->access_delay = access_delay;
- nand->program_delay = programm_delay;
- nand->erase_delay = erase_delay;
- nand->output_cycle = output_cycle;
- nand->input_cycle = input_cycle;
- nand->bitflips = bitflips;
+ nand->do_delays = nsparam->do_delays;
+ nand->access_delay = nsparam->access_delay;
+ nand->program_delay = nsparam->program_delay;
+ nand->erase_delay = nsparam->erase_delay;
+ nand->output_cycle = nsparam->output_cycle;
+ nand->input_cycle = nsparam->input_cycle;
+ nand->bitflips = nsparam->bitflips;
retval = nand_scan_ident(nsmtd, 1, NULL);
if (retval) {
@@ -2394,7 +2417,7 @@ static int __init ns_init_default(void)
goto error;
}
- if (bch) {
+ if (nsparam->bch) {
unsigned int eccsteps, eccbytes;
if (!mtd_nand_has_bch()) {
NS_ERR("BCH ECC support is disabled\n");
@@ -2403,7 +2426,7 @@ static int __init ns_init_default(void)
}
/* use 512-byte ecc blocks */
eccsteps = nsmtd->writesize/512;
- eccbytes = (bch*13+7)/8;
+ eccbytes = (nsparam->bch * 13 + 7) / 8;
/* do not bother supporting small page devices */
if ((nsmtd->oobsize < 64) || !eccsteps) {
NS_ERR("bch not available on small page devices\n");
@@ -2411,16 +2434,16 @@ static int __init ns_init_default(void)
goto error;
}
if ((eccbytes*eccsteps+2) > nsmtd->oobsize) {
- NS_ERR("invalid bch value %u\n", bch);
+ NS_ERR("invalid bch value %u\n", nsparam->bch);
retval = -EINVAL;
goto error;
}
chip->ecc.mode = NAND_ECC_SOFT;
chip->ecc.algo = NAND_ECC_BCH;
chip->ecc.size = 512;
- chip->ecc.strength = bch;
+ chip->ecc.strength = nsparam->bch;
chip->ecc.bytes = eccbytes;
- NS_INFO("using %u-bit/%u bytes BCH ECC\n", bch, chip->ecc.size);
+ NS_INFO("using %u-bit/%u bytes BCH ECC\n", nsparam->bch, chip->ecc.size);
}
retval = nand_scan_tail(nsmtd);
@@ -2431,9 +2454,9 @@ static int __init ns_init_default(void)
goto error;
}
- if (overridesize) {
- uint64_t new_size = (uint64_t)nsmtd->erasesize << overridesize;
- if (new_size >> overridesize != nsmtd->erasesize) {
+ if (nsparam->overridesize) {
+ uint64_t new_size = (uint64_t)nsmtd->erasesize << nsparam->overridesize;
+ if (new_size >> nsparam->overridesize != nsmtd->erasesize) {
NS_ERR("overridesize is too big\n");
retval = -EINVAL;
goto err_exit;
@@ -2441,7 +2464,7 @@ static int __init ns_init_default(void)
/* 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->chip_shift = ffs(nsmtd->erasesize) + nsparam->overridesize - 1;
chip->pagemask = (chip->chipsize >> chip->page_shift) - 1;
}
@@ -2451,13 +2474,13 @@ static int __init ns_init_default(void)
if ((retval = nandsim_debugfs_create(nand)) != 0)
goto err_exit;
- if ((retval = init_nandsim(nsmtd)) != 0)
+ if ((retval = init_nandsim(nsmtd, nsparam)) != 0)
goto err_exit;
if ((retval = chip->scan_bbt(nsmtd)) != 0)
goto err_exit;
- if ((retval = parse_badblocks(nand, nsmtd, badblocks)) != 0)
+ if ((retval = parse_badblocks(nand, nsmtd, nsparam->badblocks)) != 0)
goto err_exit;
/* Register NAND partitions */
@@ -2496,6 +2519,40 @@ static void __exit ns_cleanup_default(void)
kfree(mtd_to_nand(nsmtd)); /* Free other structures */
}
+static int __init ns_init_default(void)
+{
+ int ret;
+ struct nandsim_params *nsparam = kzalloc(sizeof(*nsparam), GFP_KERNEL);
+
+ if (!nsparam)
+ return -ENOMEM;
+
+ nsparam->access_delay = access_delay;
+ nsparam->program_delay = programm_delay;
+ nsparam->erase_delay = erase_delay;
+ nsparam->output_cycle = output_cycle;
+ nsparam->input_cycle = input_cycle;
+ nsparam->bus_width = bus_width;
+ nsparam->do_delays = do_delays;
+ nsparam->parts = parts;
+ nsparam->parts_num = parts_num;
+ nsparam->badblocks = badblocks;
+ nsparam->weakblocks = weakblocks;
+ nsparam->weakpages = weakpages;
+ nsparam->bitflips = bitflips;
+ nsparam->gravepages = gravepages;
+ nsparam->overridesize = overridesize;
+ nsparam->cache_file = cache_file;
+ nsparam->bbt = bbt;
+ nsparam->bch = bch;
+ nsparam->id_bytes = id_bytes;
+
+ ret = ns_new_instance(nsparam);
+ kfree(nsparam);
+
+ return ret;
+}
+
static int __init ns_init_module(void)
{
int ret;
--
2.8.3
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