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authorTom Rini <trini@ti.com>2013-03-14 05:32:50 +0000
committerMarek Vasut <marex@denx.de>2013-04-10 15:22:22 +0200
commitc39d6a0ea57d57b53bd7fb8933874e1640e47888 (patch)
treec3e91d95b7fa285301973278ca4cb2b31ab8c621 /common/cmd_nand.c
parenta24c3155db20f979f9a0aa758d4665f221e470b9 (diff)
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nand: Extend nand_(read|write)_skip_bad with *actual and limit parameters
We make these two functions take a size_t pointer to how much space was used on NAND to read or write the buffer (when reads/writes happen) so that bad blocks can be accounted for. We also make them take an loff_t limit on how much data can be read or written. This means that we can now catch the case of when writing to a partition would exceed the partition size due to bad blocks. To do this we also need to make check_skip_len count not just complete blocks used but partial ones as well. All callers of nand_(read|write)_skip_bad are adjusted to call these with the most sensible limits available. The changes were started by Pantelis and finished by Tom. Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com> Signed-off-by: Tom Rini <trini@ti.com>
Diffstat (limited to 'common/cmd_nand.c')
-rw-r--r--common/cmd_nand.c53
1 files changed, 31 insertions, 22 deletions
diff --git a/common/cmd_nand.c b/common/cmd_nand.c
index 32348f3..110c78c 100644
--- a/common/cmd_nand.c
+++ b/common/cmd_nand.c
@@ -137,7 +137,8 @@ static inline int str2long(const char *p, ulong *num)
return *p != '\0' && *endptr == '\0';
}
-static int get_part(const char *partname, int *idx, loff_t *off, loff_t *size)
+static int get_part(const char *partname, int *idx, loff_t *off, loff_t *size,
+ loff_t *maxsize)
{
#ifdef CONFIG_CMD_MTDPARTS
struct mtd_device *dev;
@@ -160,6 +161,7 @@ static int get_part(const char *partname, int *idx, loff_t *off, loff_t *size)
*off = part->offset;
*size = part->size;
+ *maxsize = part->size;
*idx = dev->id->num;
ret = set_dev(*idx);
@@ -173,10 +175,11 @@ static int get_part(const char *partname, int *idx, loff_t *off, loff_t *size)
#endif
}
-static int arg_off(const char *arg, int *idx, loff_t *off, loff_t *maxsize)
+static int arg_off(const char *arg, int *idx, loff_t *off, loff_t *size,
+ loff_t *maxsize)
{
if (!str2off(arg, off))
- return get_part(arg, idx, off, maxsize);
+ return get_part(arg, idx, off, size, maxsize);
if (*off >= nand_info[*idx].size) {
puts("Offset exceeds device limit\n");
@@ -184,36 +187,35 @@ static int arg_off(const char *arg, int *idx, loff_t *off, loff_t *maxsize)
}
*maxsize = nand_info[*idx].size - *off;
+ *size = *maxsize;
return 0;
}
static int arg_off_size(int argc, char *const argv[], int *idx,
- loff_t *off, loff_t *size)
+ loff_t *off, loff_t *size, loff_t *maxsize)
{
int ret;
- loff_t maxsize = 0;
if (argc == 0) {
*off = 0;
*size = nand_info[*idx].size;
+ *maxsize = *size;
goto print;
}
- ret = arg_off(argv[0], idx, off, &maxsize);
+ ret = arg_off(argv[0], idx, off, size, maxsize);
if (ret)
return ret;
- if (argc == 1) {
- *size = maxsize;
+ if (argc == 1)
goto print;
- }
if (!str2off(argv[1], size)) {
printf("'%s' is not a number\n", argv[1]);
return -1;
}
- if (*size > maxsize) {
+ if (*size > *maxsize) {
puts("Size exceeds partition or device limit\n");
return -1;
}
@@ -307,7 +309,8 @@ int do_nand_env_oob(cmd_tbl_t *cmdtp, int argc, char *const argv[])
if (argc < 3)
goto usage;
- if (arg_off(argv[2], &idx, &addr, &maxsize)) {
+ /* We don't care about size, or maxsize. */
+ if (arg_off(argv[2], &idx, &addr, &maxsize, &maxsize)) {
puts("Offset or partition name expected\n");
return 1;
}
@@ -426,7 +429,7 @@ static int do_nand(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
int i, ret = 0;
ulong addr;
- loff_t off, size;
+ loff_t off, size, maxsize;
char *cmd, *s;
nand_info_t *nand;
#ifdef CONFIG_SYS_NAND_QUIET
@@ -551,7 +554,8 @@ static int do_nand(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
printf("\nNAND %s: ", cmd);
/* skip first two or three arguments, look for offset and size */
- if (arg_off_size(argc - o, argv + o, &dev, &off, &size) != 0)
+ if (arg_off_size(argc - o, argv + o, &dev, &off, &size,
+ &maxsize) != 0)
return 1;
nand = &nand_info[dev];
@@ -619,7 +623,7 @@ static int do_nand(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
if (s && !strcmp(s, ".raw")) {
raw = 1;
- if (arg_off(argv[3], &dev, &off, &size))
+ if (arg_off(argv[3], &dev, &off, &size, &maxsize))
return 1;
if (argc > 4 && !str2long(argv[4], &pagecount)) {
@@ -635,7 +639,7 @@ static int do_nand(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
rwsize = pagecount * (nand->writesize + nand->oobsize);
} else {
if (arg_off_size(argc - 3, argv + 3, &dev,
- &off, &size) != 0)
+ &off, &size, &maxsize) != 0)
return 1;
rwsize = size;
@@ -645,9 +649,11 @@ static int do_nand(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
!strcmp(s, ".e") || !strcmp(s, ".i")) {
if (read)
ret = nand_read_skip_bad(nand, off, &rwsize,
+ NULL, maxsize,
(u_char *)addr);
else
ret = nand_write_skip_bad(nand, off, &rwsize,
+ NULL, maxsize,
(u_char *)addr, 0);
#ifdef CONFIG_CMD_NAND_TRIMFFS
} else if (!strcmp(s, ".trimffs")) {
@@ -655,8 +661,8 @@ static int do_nand(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
printf("Unknown nand command suffix '%s'\n", s);
return 1;
}
- ret = nand_write_skip_bad(nand, off, &rwsize,
- (u_char *)addr,
+ ret = nand_write_skip_bad(nand, off, &rwsize, NULL,
+ maxsize, (u_char *)addr,
WITH_DROP_FFS);
#endif
#ifdef CONFIG_CMD_NAND_YAFFS
@@ -665,8 +671,8 @@ static int do_nand(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
printf("Unknown nand command suffix '%s'.\n", s);
return 1;
}
- ret = nand_write_skip_bad(nand, off, &rwsize,
- (u_char *)addr,
+ ret = nand_write_skip_bad(nand, off, &rwsize, NULL,
+ maxsize, (u_char *)addr,
WITH_INLINE_OOB);
#endif
} else if (!strcmp(s, ".oob")) {
@@ -775,7 +781,8 @@ static int do_nand(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
if (s && !strcmp(s, ".allexcept"))
allexcept = 1;
- if (arg_off_size(argc - 2, argv + 2, &dev, &off, &size) < 0)
+ if (arg_off_size(argc - 2, argv + 2, &dev, &off, &size,
+ &maxsize) < 0)
return 1;
if (!nand_unlock(&nand_info[dev], off, size, allexcept)) {
@@ -873,7 +880,8 @@ static int nand_load_image(cmd_tbl_t *cmdtp, nand_info_t *nand,
printf("\nLoading from %s, offset 0x%lx\n", nand->name, offset);
cnt = nand->writesize;
- r = nand_read_skip_bad(nand, offset, &cnt, (u_char *) addr);
+ r = nand_read_skip_bad(nand, offset, &cnt, NULL, nand->size,
+ (u_char *)addr);
if (r) {
puts("** Read error\n");
bootstage_error(BOOTSTAGE_ID_NAND_HDR_READ);
@@ -905,7 +913,8 @@ static int nand_load_image(cmd_tbl_t *cmdtp, nand_info_t *nand,
}
bootstage_mark(BOOTSTAGE_ID_NAND_TYPE);
- r = nand_read_skip_bad(nand, offset, &cnt, (u_char *) addr);
+ r = nand_read_skip_bad(nand, offset, &cnt, NULL, nand->size,
+ (u_char *)addr);
if (r) {
puts("** Read error\n");
bootstage_error(BOOTSTAGE_ID_NAND_READ);