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Diffstat (limited to 'include/linux/mtd/mtd.h')
-rw-r--r--include/linux/mtd/mtd.h77
1 files changed, 59 insertions, 18 deletions
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index eae26bb6430a..3aa5d77c2cdb 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -15,6 +15,8 @@
#include <linux/mtd/compatmac.h>
#include <mtd/mtd-abi.h>
+#include <asm/div64.h>
+
#define MTD_CHAR_MAJOR 90
#define MTD_BLOCK_MAJOR 31
#define MAX_MTD_DEVICES 32
@@ -25,20 +27,20 @@
#define MTD_ERASE_DONE 0x08
#define MTD_ERASE_FAILED 0x10
-#define MTD_FAIL_ADDR_UNKNOWN 0xffffffff
+#define MTD_FAIL_ADDR_UNKNOWN -1LL
/* If the erase fails, fail_addr might indicate exactly which block failed. If
fail_addr = MTD_FAIL_ADDR_UNKNOWN, the failure was not at the device level or was not
specific to any particular block. */
struct erase_info {
struct mtd_info *mtd;
- u_int32_t addr;
- u_int32_t len;
- u_int32_t fail_addr;
+ uint64_t addr;
+ uint64_t len;
+ uint64_t fail_addr;
u_long time;
u_long retries;
- u_int dev;
- u_int cell;
+ unsigned dev;
+ unsigned cell;
void (*callback) (struct erase_info *self);
u_long priv;
u_char state;
@@ -46,9 +48,9 @@ struct erase_info {
};
struct mtd_erase_region_info {
- u_int32_t offset; /* At which this region starts, from the beginning of the MTD */
- u_int32_t erasesize; /* For this region */
- u_int32_t numblocks; /* Number of blocks of erasesize in this region */
+ uint64_t offset; /* At which this region starts, from the beginning of the MTD */
+ uint32_t erasesize; /* For this region */
+ uint32_t numblocks; /* Number of blocks of erasesize in this region */
unsigned long *lockmap; /* If keeping bitmap of locks */
};
@@ -83,7 +85,7 @@ typedef enum {
* @datbuf: data buffer - if NULL only oob data are read/written
* @oobbuf: oob data buffer
*
- * Note, it is allowed to read more then one OOB area at one go, but not write.
+ * Note, it is allowed to read more than one OOB area at one go, but not write.
* The interface assumes that the OOB write requests program only one page's
* OOB area.
*/
@@ -100,14 +102,14 @@ struct mtd_oob_ops {
struct mtd_info {
u_char type;
- u_int32_t flags;
- u_int32_t size; // Total size of the MTD
+ uint32_t flags;
+ uint64_t size; // Total size of the MTD
/* "Major" erase size for the device. Naïve users may take this
* to be the only erase size available, or may use the more detailed
* information below if they desire
*/
- u_int32_t erasesize;
+ uint32_t erasesize;
/* Minimal writable flash unit size. In case of NOR flash it is 1 (even
* though individual bits can be cleared), in case of NAND flash it is
* one NAND page (or half, or one-fourths of it), in case of ECC-ed NOR
@@ -115,10 +117,20 @@ struct mtd_info {
* Any driver registering a struct mtd_info must ensure a writesize of
* 1 or larger.
*/
- u_int32_t writesize;
+ uint32_t writesize;
+
+ uint32_t oobsize; // Amount of OOB data per block (e.g. 16)
+ uint32_t oobavail; // Available OOB bytes per block
- u_int32_t oobsize; // Amount of OOB data per block (e.g. 16)
- u_int32_t oobavail; // Available OOB bytes per block
+ /*
+ * If erasesize is a power of 2 then the shift is stored in
+ * erasesize_shift otherwise erasesize_shift is zero. Ditto writesize.
+ */
+ unsigned int erasesize_shift;
+ unsigned int writesize_shift;
+ /* Masks based on erasesize_shift and writesize_shift */
+ unsigned int erasesize_mask;
+ unsigned int writesize_mask;
// Kernel-only stuff starts here.
const char *name;
@@ -190,8 +202,8 @@ struct mtd_info {
void (*sync) (struct mtd_info *mtd);
/* Chip-supported device locking */
- int (*lock) (struct mtd_info *mtd, loff_t ofs, size_t len);
- int (*unlock) (struct mtd_info *mtd, loff_t ofs, size_t len);
+ int (*lock) (struct mtd_info *mtd, loff_t ofs, uint64_t len);
+ int (*unlock) (struct mtd_info *mtd, loff_t ofs, uint64_t len);
/* Power Management functions */
int (*suspend) (struct mtd_info *mtd);
@@ -221,6 +233,35 @@ struct mtd_info {
void (*put_device) (struct mtd_info *mtd);
};
+static inline uint32_t mtd_div_by_eb(uint64_t sz, struct mtd_info *mtd)
+{
+ if (mtd->erasesize_shift)
+ return sz >> mtd->erasesize_shift;
+ do_div(sz, mtd->erasesize);
+ return sz;
+}
+
+static inline uint32_t mtd_mod_by_eb(uint64_t sz, struct mtd_info *mtd)
+{
+ if (mtd->erasesize_shift)
+ return sz & mtd->erasesize_mask;
+ return do_div(sz, mtd->erasesize);
+}
+
+static inline uint32_t mtd_div_by_ws(uint64_t sz, struct mtd_info *mtd)
+{
+ if (mtd->writesize_shift)
+ return sz >> mtd->writesize_shift;
+ do_div(sz, mtd->writesize);
+ return sz;
+}
+
+static inline uint32_t mtd_mod_by_ws(uint64_t sz, struct mtd_info *mtd)
+{
+ if (mtd->writesize_shift)
+ return sz & mtd->writesize_mask;
+ return do_div(sz, mtd->writesize);
+}
/* Kernel-side ioctl definitions */