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mtd: add MEMERASE64 ioctl for >4GiB devices 

New MEMERASE/MEMREADOOB/MEMWRITEOOB ioctls are needed in order to support
64-bit offsets into large NAND flash devices.

Signed-off-by: Kevin Cernekee <kpc.mtd@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Kevin Cernekee 2009-04-08 22:52:28 -07:00 committed by David Woodhouse
parent 19fe7f1a00
commit 0dc54e9f33
3 changed files with 28 additions and 8 deletions
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29
drivers/mtd/mtdchar.c
View File

@ -417,6 +417,7 @@ static int mtd_ioctl(struct inode *inode, struct file *file,
break;
case MEMERASE:
case MEMERASE64:
{
struct erase_info *erase;
@ -427,20 +428,32 @@ static int mtd_ioctl(struct inode *inode, struct file *file,
if (!erase)
ret = -ENOMEM;
else {
struct erase_info_user einfo;
wait_queue_head_t waitq;
DECLARE_WAITQUEUE(wait, current);
init_waitqueue_head(&waitq);
if (copy_from_user(&einfo, argp,
sizeof(struct erase_info_user))) {
kfree(erase);
return -EFAULT;
if (cmd == MEMERASE64) {
struct erase_info_user64 einfo64;
if (copy_from_user(&einfo64, argp,
sizeof(struct erase_info_user64))) {
kfree(erase);
return -EFAULT;
}
erase->addr = einfo64.start;
erase->len = einfo64.length;
} else {
struct erase_info_user einfo32;
if (copy_from_user(&einfo32, argp,
sizeof(struct erase_info_user))) {
kfree(erase);
return -EFAULT;
}
erase->addr = einfo32.start;
erase->len = einfo32.length;
}
erase->addr = einfo.start;
erase->len = einfo.length;
erase->mtd = mtd;
erase->callback = mtdchar_erase_callback;
erase->priv = (unsigned long)&waitq;

1
fs/compat_ioctl.c
View File

@ -2441,6 +2441,7 @@ COMPATIBLE_IOCTL(MEMGETREGIONCOUNT)
COMPATIBLE_IOCTL(MEMGETREGIONINFO)
COMPATIBLE_IOCTL(MEMGETBADBLOCK)
COMPATIBLE_IOCTL(MEMSETBADBLOCK)
COMPATIBLE_IOCTL(MEMERASE64)
/* NBD */
ULONG_IOCTL(NBD_SET_SOCK)
ULONG_IOCTL(NBD_SET_BLKSIZE)

6
include/mtd/mtd-abi.h
View File

@ -12,6 +12,11 @@ struct erase_info_user {
__u32 length;
};
struct erase_info_user64 {
__u64 start;
__u64 length;
};
struct mtd_oob_buf {
__u32 start;
__u32 length;
@ -95,6 +100,7 @@ struct otp_info {
#define ECCGETLAYOUT _IOR('M', 17, struct nand_ecclayout)
#define ECCGETSTATS _IOR('M', 18, struct mtd_ecc_stats)
#define MTDFILEMODE _IO('M', 19)
#define MEMERASE64 _IOW('M', 20, struct erase_info_user64)
/*
* Obsolete legacy interface. Keep it in order not to break userspace