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drivers/mtd/mtdchar.c
26.1 KB
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/* |
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* Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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* */ |
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#include <linux/device.h> #include <linux/fs.h> |
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#include <linux/mm.h> |
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#include <linux/err.h> |
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#include <linux/init.h> |
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#include <linux/kernel.h> #include <linux/module.h> |
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#include <linux/slab.h> #include <linux/sched.h> |
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#include <linux/mutex.h> |
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#include <linux/backing-dev.h> |
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#include <linux/compat.h> |
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#include <linux/mount.h> |
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#include <linux/blkpg.h> |
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#include <linux/mtd/mtd.h> |
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#include <linux/mtd/partitions.h> |
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#include <linux/mtd/map.h> |
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|
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#include <asm/uaccess.h> |
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|
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#define MTD_INODE_FS_MAGIC 0x11307854 |
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static DEFINE_MUTEX(mtd_mutex); |
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static struct vfsmount *mtd_inode_mnt __read_mostly; |
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|
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/* |
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* Data structure to hold the pointer to the mtd device as well * as mode information ofr various use cases. |
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*/ |
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struct mtd_file_info { struct mtd_info *mtd; |
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struct inode *ino; |
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enum mtd_file_modes mode; }; |
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|
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static loff_t mtd_lseek (struct file *file, loff_t offset, int orig) { |
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struct mtd_file_info *mfi = file->private_data; struct mtd_info *mtd = mfi->mtd; |
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switch (orig) { |
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case SEEK_SET: |
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break; |
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case SEEK_CUR: |
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offset += file->f_pos; |
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break; |
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case SEEK_END: |
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offset += mtd->size; |
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break; default: return -EINVAL; } |
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if (offset >= 0 && offset <= mtd->size) |
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return file->f_pos = offset; |
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|
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return -EINVAL; |
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} static int mtd_open(struct inode *inode, struct file *file) { int minor = iminor(inode); int devnum = minor >> 1; |
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int ret = 0; |
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struct mtd_info *mtd; |
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struct mtd_file_info *mfi; |
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struct inode *mtd_ino; |
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DEBUG(MTD_DEBUG_LEVEL0, "MTD_open "); |
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/* You can't open the RO devices RW */ |
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if ((file->f_mode & FMODE_WRITE) && (minor & 1)) |
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return -EACCES; |
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mutex_lock(&mtd_mutex); |
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mtd = get_mtd_device(NULL, devnum); |
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|
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if (IS_ERR(mtd)) { ret = PTR_ERR(mtd); goto out; } |
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|
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if (mtd->type == MTD_ABSENT) { |
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put_mtd_device(mtd); |
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ret = -ENODEV; goto out; |
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} |
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mtd_ino = iget_locked(mtd_inode_mnt->mnt_sb, devnum); if (!mtd_ino) { put_mtd_device(mtd); ret = -ENOMEM; goto out; } if (mtd_ino->i_state & I_NEW) { mtd_ino->i_private = mtd; mtd_ino->i_mode = S_IFCHR; mtd_ino->i_data.backing_dev_info = mtd->backing_dev_info; unlock_new_inode(mtd_ino); } file->f_mapping = mtd_ino->i_mapping; |
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|
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/* You can't open it RW if it's not a writeable device */ |
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if ((file->f_mode & FMODE_WRITE) && !(mtd->flags & MTD_WRITEABLE)) { |
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iput(mtd_ino); |
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put_mtd_device(mtd); |
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ret = -EACCES; goto out; |
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} |
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|
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mfi = kzalloc(sizeof(*mfi), GFP_KERNEL); if (!mfi) { |
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iput(mtd_ino); |
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put_mtd_device(mtd); |
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ret = -ENOMEM; goto out; |
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} |
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mfi->ino = mtd_ino; |
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mfi->mtd = mtd; file->private_data = mfi; |
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out: |
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mutex_unlock(&mtd_mutex); |
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return ret; |
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} /* mtd_open */ /*====================================================================*/ static int mtd_close(struct inode *inode, struct file *file) { |
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struct mtd_file_info *mfi = file->private_data; struct mtd_info *mtd = mfi->mtd; |
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DEBUG(MTD_DEBUG_LEVEL0, "MTD_close "); |
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/* Only sync if opened RW */ |
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if ((file->f_mode & FMODE_WRITE) && mtd->sync) |
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mtd->sync(mtd); |
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|
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iput(mfi->ino); |
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put_mtd_device(mtd); |
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file->private_data = NULL; kfree(mfi); |
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return 0; } /* mtd_close */ |
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/* Back in June 2001, dwmw2 wrote: * * FIXME: This _really_ needs to die. In 2.5, we should lock the * userspace buffer down and use it directly with readv/writev. * * The implementation below, using mtd_kmalloc_up_to, mitigates * allocation failures when the system is under low-memory situations * or if memory is highly fragmented at the cost of reducing the * performance of the requested transfer due to a smaller buffer size. * * A more complex but more memory-efficient implementation based on * get_user_pages and iovecs to cover extents of those pages is a * longer-term goal, as intimated by dwmw2 above. However, for the * write case, this requires yet more complex head and tail transfer * handling when those head and tail offsets and sizes are such that * alignment requirements are not met in the NAND subdriver. */ |
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static ssize_t mtd_read(struct file *file, char __user *buf, size_t count,loff_t *ppos) { |
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struct mtd_file_info *mfi = file->private_data; struct mtd_info *mtd = mfi->mtd; |
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size_t retlen=0; size_t total_retlen=0; int ret=0; int len; |
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size_t size = count; |
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char *kbuf; |
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|
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DEBUG(MTD_DEBUG_LEVEL0,"MTD_read "); if (*ppos + count > mtd->size) count = mtd->size - *ppos; if (!count) return 0; |
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kbuf = mtd_kmalloc_up_to(mtd, &size); |
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if (!kbuf) return -ENOMEM; |
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while (count) { |
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len = min_t(size_t, count, size); |
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|
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switch (mfi->mode) { case MTD_MODE_OTP_FACTORY: |
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ret = mtd->read_fact_prot_reg(mtd, *ppos, len, &retlen, kbuf); break; case MTD_MODE_OTP_USER: ret = mtd->read_user_prot_reg(mtd, *ppos, len, &retlen, kbuf); break; |
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case MTD_MODE_RAW: { struct mtd_oob_ops ops; ops.mode = MTD_OOB_RAW; ops.datbuf = kbuf; ops.oobbuf = NULL; ops.len = len; ret = mtd->read_oob(mtd, *ppos, &ops); retlen = ops.retlen; break; } |
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default: |
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ret = mtd->read(mtd, *ppos, len, &retlen, kbuf); |
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} |
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/* Nand returns -EBADMSG on ecc errors, but it returns * the data. For our userspace tools it is important |
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* to dump areas with ecc errors ! |
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* For kernel internal usage it also might return -EUCLEAN |
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* to signal the caller that a bitflip has occurred and has |
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* been corrected by the ECC algorithm. |
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* Userspace software which accesses NAND this way * must be aware of the fact that it deals with NAND */ |
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if (!ret || (ret == -EUCLEAN) || (ret == -EBADMSG)) { |
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*ppos += retlen; if (copy_to_user(buf, kbuf, retlen)) { |
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kfree(kbuf); |
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return -EFAULT; } else total_retlen += retlen; count -= retlen; buf += retlen; |
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if (retlen == 0) count = 0; |
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} else { kfree(kbuf); return ret; } |
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|
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} |
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kfree(kbuf); |
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return total_retlen; } /* mtd_read */ static ssize_t mtd_write(struct file *file, const char __user *buf, size_t count,loff_t *ppos) { |
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struct mtd_file_info *mfi = file->private_data; struct mtd_info *mtd = mfi->mtd; |
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size_t size = count; |
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char *kbuf; size_t retlen; size_t total_retlen=0; int ret=0; int len; DEBUG(MTD_DEBUG_LEVEL0,"MTD_write "); |
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|
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if (*ppos == mtd->size) return -ENOSPC; |
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|
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if (*ppos + count > mtd->size) count = mtd->size - *ppos; if (!count) return 0; |
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kbuf = mtd_kmalloc_up_to(mtd, &size); |
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if (!kbuf) return -ENOMEM; |
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while (count) { |
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len = min_t(size_t, count, size); |
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if (copy_from_user(kbuf, buf, len)) { kfree(kbuf); return -EFAULT; } |
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|
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switch (mfi->mode) { case MTD_MODE_OTP_FACTORY: |
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ret = -EROFS; break; case MTD_MODE_OTP_USER: if (!mtd->write_user_prot_reg) { ret = -EOPNOTSUPP; break; } ret = mtd->write_user_prot_reg(mtd, *ppos, len, &retlen, kbuf); break; |
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case MTD_MODE_RAW: { struct mtd_oob_ops ops; ops.mode = MTD_OOB_RAW; ops.datbuf = kbuf; ops.oobbuf = NULL; ops.len = len; ret = mtd->write_oob(mtd, *ppos, &ops); retlen = ops.retlen; break; } |
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default: ret = (*(mtd->write))(mtd, *ppos, len, &retlen, kbuf); } |
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if (!ret) { *ppos += retlen; total_retlen += retlen; count -= retlen; buf += retlen; } else { kfree(kbuf); return ret; } |
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} |
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kfree(kbuf); |
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return total_retlen; } /* mtd_write */ /*====================================================================== IOCTL calls for getting device parameters. ======================================================================*/ static void mtdchar_erase_callback (struct erase_info *instr) { wake_up((wait_queue_head_t *)instr->priv); } |
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#ifdef CONFIG_HAVE_MTD_OTP |
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static int otp_select_filemode(struct mtd_file_info *mfi, int mode) { struct mtd_info *mtd = mfi->mtd; int ret = 0; switch (mode) { case MTD_OTP_FACTORY: if (!mtd->read_fact_prot_reg) ret = -EOPNOTSUPP; else mfi->mode = MTD_MODE_OTP_FACTORY; break; case MTD_OTP_USER: if (!mtd->read_fact_prot_reg) ret = -EOPNOTSUPP; else mfi->mode = MTD_MODE_OTP_USER; break; default: ret = -EINVAL; case MTD_OTP_OFF: break; } return ret; } #else # define otp_select_filemode(f,m) -EOPNOTSUPP #endif |
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static int mtd_do_writeoob(struct file *file, struct mtd_info *mtd, uint64_t start, uint32_t length, void __user *ptr, uint32_t __user *retp) { struct mtd_oob_ops ops; uint32_t retlen; int ret = 0; if (!(file->f_mode & FMODE_WRITE)) return -EPERM; if (length > 4096) return -EINVAL; if (!mtd->write_oob) ret = -EOPNOTSUPP; else |
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ret = access_ok(VERIFY_READ, ptr, length) ? 0 : -EFAULT; |
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if (ret) return ret; ops.ooblen = length; ops.ooboffs = start & (mtd->oobsize - 1); ops.datbuf = NULL; ops.mode = MTD_OOB_PLACE; if (ops.ooboffs && ops.ooblen > (mtd->oobsize - ops.ooboffs)) return -EINVAL; |
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ops.oobbuf = memdup_user(ptr, length); if (IS_ERR(ops.oobbuf)) return PTR_ERR(ops.oobbuf); |
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start &= ~((uint64_t)mtd->oobsize - 1); ret = mtd->write_oob(mtd, start, &ops); if (ops.oobretlen > 0xFFFFFFFFU) ret = -EOVERFLOW; retlen = ops.oobretlen; if (copy_to_user(retp, &retlen, sizeof(length))) ret = -EFAULT; kfree(ops.oobbuf); return ret; } static int mtd_do_readoob(struct mtd_info *mtd, uint64_t start, uint32_t length, void __user *ptr, uint32_t __user *retp) { struct mtd_oob_ops ops; int ret = 0; if (length > 4096) return -EINVAL; if (!mtd->read_oob) ret = -EOPNOTSUPP; else ret = access_ok(VERIFY_WRITE, ptr, length) ? 0 : -EFAULT; if (ret) return ret; ops.ooblen = length; ops.ooboffs = start & (mtd->oobsize - 1); ops.datbuf = NULL; ops.mode = MTD_OOB_PLACE; if (ops.ooboffs && ops.ooblen > (mtd->oobsize - ops.ooboffs)) return -EINVAL; ops.oobbuf = kmalloc(length, GFP_KERNEL); if (!ops.oobbuf) return -ENOMEM; start &= ~((uint64_t)mtd->oobsize - 1); ret = mtd->read_oob(mtd, start, &ops); if (put_user(ops.oobretlen, retp)) ret = -EFAULT; else if (ops.oobretlen && copy_to_user(ptr, ops.oobbuf, ops.oobretlen)) ret = -EFAULT; kfree(ops.oobbuf); return ret; } |
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/* * Copies (and truncates, if necessary) data from the larger struct, * nand_ecclayout, to the smaller, deprecated layout struct, * nand_ecclayout_user. This is necessary only to suppport the deprecated * API ioctl ECCGETLAYOUT while allowing all new functionality to use * nand_ecclayout flexibly (i.e. the struct may change size in new * releases without requiring major rewrites). */ static int shrink_ecclayout(const struct nand_ecclayout *from, struct nand_ecclayout_user *to) { int i; if (!from || !to) return -EINVAL; memset(to, 0, sizeof(*to)); |
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to->eccbytes = min((int)from->eccbytes, MTD_MAX_ECCPOS_ENTRIES); |
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481 482 483 484 485 486 487 488 489 490 491 492 493 |
for (i = 0; i < to->eccbytes; i++) to->eccpos[i] = from->eccpos[i]; for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES; i++) { if (from->oobfree[i].length == 0 && from->oobfree[i].offset == 0) break; to->oobavail += from->oobfree[i].length; to->oobfree[i] = from->oobfree[i]; } return 0; } |
d0f7959e2 mtd: add BLKPG AP... |
494 495 496 497 498 499 500 501 |
static int mtd_blkpg_ioctl(struct mtd_info *mtd, struct blkpg_ioctl_arg __user *arg) { struct blkpg_ioctl_arg a; struct blkpg_partition p; if (!capable(CAP_SYS_ADMIN)) return -EPERM; |
d0f7959e2 mtd: add BLKPG AP... |
502 503 504 505 506 507 508 509 |
if (copy_from_user(&a, arg, sizeof(struct blkpg_ioctl_arg))) return -EFAULT; if (copy_from_user(&p, a.data, sizeof(struct blkpg_partition))) return -EFAULT; switch (a.op) { case BLKPG_ADD_PARTITION: |
a7e93dcd9 mtd: fix master d... |
510 511 512 |
/* Only master mtd device must be used to add partitions */ if (mtd_is_partition(mtd)) return -EINVAL; |
d0f7959e2 mtd: add BLKPG AP... |
513 514 515 516 517 518 519 520 521 522 523 524 525 |
return mtd_add_partition(mtd, p.devname, p.start, p.length); case BLKPG_DEL_PARTITION: if (p.pno < 0) return -EINVAL; return mtd_del_partition(mtd, p.pno); default: return -EINVAL; } } |
d0f7959e2 mtd: add BLKPG AP... |
526 |
|
55929332c drivers: Push dow... |
527 |
static int mtd_ioctl(struct file *file, u_int cmd, u_long arg) |
1da177e4c Linux-2.6.12-rc2 |
528 |
{ |
f1a28c028 [MTD] NAND Expose... |
529 530 |
struct mtd_file_info *mfi = file->private_data; struct mtd_info *mtd = mfi->mtd; |
1da177e4c Linux-2.6.12-rc2 |
531 532 533 |
void __user *argp = (void __user *)arg; int ret = 0; u_long size; |
73c619ea0 [MTD] Disconnect ... |
534 |
struct mtd_info_user info; |
97894cda5 [MTD] core: Clean... |
535 |
|
1da177e4c Linux-2.6.12-rc2 |
536 537 538 539 540 541 542 543 544 545 546 547 |
DEBUG(MTD_DEBUG_LEVEL0, "MTD_ioctl "); size = (cmd & IOCSIZE_MASK) >> IOCSIZE_SHIFT; if (cmd & IOC_IN) { if (!access_ok(VERIFY_READ, argp, size)) return -EFAULT; } if (cmd & IOC_OUT) { if (!access_ok(VERIFY_WRITE, argp, size)) return -EFAULT; } |
97894cda5 [MTD] core: Clean... |
548 |
|
1da177e4c Linux-2.6.12-rc2 |
549 550 551 552 553 554 555 556 |
switch (cmd) { case MEMGETREGIONCOUNT: if (copy_to_user(argp, &(mtd->numeraseregions), sizeof(int))) return -EFAULT; break; case MEMGETREGIONINFO: { |
b67c5f87c [MTD] mtdchar.c: ... |
557 558 |
uint32_t ur_idx; struct mtd_erase_region_info *kr; |
bcc98a46e mtd: fix differen... |
559 |
struct region_info_user __user *ur = argp; |
1da177e4c Linux-2.6.12-rc2 |
560 |
|
b67c5f87c [MTD] mtdchar.c: ... |
561 |
if (get_user(ur_idx, &(ur->regionindex))) |
1da177e4c Linux-2.6.12-rc2 |
562 |
return -EFAULT; |
5e59be1f3 mtd: sanity check... |
563 564 |
if (ur_idx >= mtd->numeraseregions) return -EINVAL; |
b67c5f87c [MTD] mtdchar.c: ... |
565 566 567 568 569 |
kr = &(mtd->eraseregions[ur_idx]); if (put_user(kr->offset, &(ur->offset)) || put_user(kr->erasesize, &(ur->erasesize)) || put_user(kr->numblocks, &(ur->numblocks))) |
1da177e4c Linux-2.6.12-rc2 |
570 |
return -EFAULT; |
b67c5f87c [MTD] mtdchar.c: ... |
571 |
|
1da177e4c Linux-2.6.12-rc2 |
572 573 574 575 |
break; } case MEMGETINFO: |
a0c5a3944 mtd: mtdchar: fix... |
576 |
memset(&info, 0, sizeof(info)); |
73c619ea0 [MTD] Disconnect ... |
577 578 579 580 581 582 |
info.type = mtd->type; info.flags = mtd->flags; info.size = mtd->size; info.erasesize = mtd->erasesize; info.writesize = mtd->writesize; info.oobsize = mtd->oobsize; |
64f607105 [MTD] remove unus... |
583 584 |
/* The below fields are obsolete */ info.ecctype = -1; |
73c619ea0 [MTD] Disconnect ... |
585 |
if (copy_to_user(argp, &info, sizeof(struct mtd_info_user))) |
1da177e4c Linux-2.6.12-rc2 |
586 587 588 589 |
return -EFAULT; break; case MEMERASE: |
0dc54e9f3 mtd: add MEMERASE... |
590 |
case MEMERASE64: |
1da177e4c Linux-2.6.12-rc2 |
591 592 |
{ struct erase_info *erase; |
aeb5d7270 [PATCH] introduce... |
593 |
if(!(file->f_mode & FMODE_WRITE)) |
1da177e4c Linux-2.6.12-rc2 |
594 |
return -EPERM; |
95b93a0cd [MTD] replace kma... |
595 |
erase=kzalloc(sizeof(struct erase_info),GFP_KERNEL); |
1da177e4c Linux-2.6.12-rc2 |
596 597 598 599 600 601 602 |
if (!erase) ret = -ENOMEM; else { wait_queue_head_t waitq; DECLARE_WAITQUEUE(wait, current); init_waitqueue_head(&waitq); |
0dc54e9f3 mtd: add MEMERASE... |
603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 |
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; |
1da177e4c Linux-2.6.12-rc2 |
623 624 625 626 |
} erase->mtd = mtd; erase->callback = mtdchar_erase_callback; erase->priv = (unsigned long)&waitq; |
97894cda5 [MTD] core: Clean... |
627 |
|
1da177e4c Linux-2.6.12-rc2 |
628 629 630 |
/* FIXME: Allow INTERRUPTIBLE. Which means not having the wait_queue head on the stack. |
97894cda5 [MTD] core: Clean... |
631 |
|
1da177e4c Linux-2.6.12-rc2 |
632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 |
If the wq_head is on the stack, and we leave because we got interrupted, then the wq_head is no longer there when the callback routine tries to wake us up. */ ret = mtd->erase(mtd, erase); if (!ret) { set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&waitq, &wait); if (erase->state != MTD_ERASE_DONE && erase->state != MTD_ERASE_FAILED) schedule(); remove_wait_queue(&waitq, &wait); set_current_state(TASK_RUNNING); ret = (erase->state == MTD_ERASE_FAILED)?-EIO:0; } kfree(erase); } break; } case MEMWRITEOOB: { struct mtd_oob_buf buf; |
977185404 mtd: compat_ioctl... |
657 |
struct mtd_oob_buf __user *buf_user = argp; |
1da177e4c Linux-2.6.12-rc2 |
658 |
|
977185404 mtd: compat_ioctl... |
659 660 |
/* NOTE: writes return length to buf_user->length */ if (copy_from_user(&buf, argp, sizeof(buf))) |
1da177e4c Linux-2.6.12-rc2 |
661 |
ret = -EFAULT; |
977185404 mtd: compat_ioctl... |
662 663 664 |
else ret = mtd_do_writeoob(file, mtd, buf.start, buf.length, buf.ptr, &buf_user->length); |
1da177e4c Linux-2.6.12-rc2 |
665 |
break; |
1da177e4c Linux-2.6.12-rc2 |
666 667 668 669 670 |
} case MEMREADOOB: { struct mtd_oob_buf buf; |
977185404 mtd: compat_ioctl... |
671 |
struct mtd_oob_buf __user *buf_user = argp; |
8593fbc68 [MTD] Rework the ... |
672 |
|
977185404 mtd: compat_ioctl... |
673 674 |
/* NOTE: writes return length to buf_user->start */ if (copy_from_user(&buf, argp, sizeof(buf))) |
1da177e4c Linux-2.6.12-rc2 |
675 |
ret = -EFAULT; |
977185404 mtd: compat_ioctl... |
676 677 678 |
else ret = mtd_do_readoob(mtd, buf.start, buf.length, buf.ptr, &buf_user->start); |
1da177e4c Linux-2.6.12-rc2 |
679 680 |
break; } |
aea7cea9f mtd: add OOB ioct... |
681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 |
case MEMWRITEOOB64: { struct mtd_oob_buf64 buf; struct mtd_oob_buf64 __user *buf_user = argp; if (copy_from_user(&buf, argp, sizeof(buf))) ret = -EFAULT; else ret = mtd_do_writeoob(file, mtd, buf.start, buf.length, (void __user *)(uintptr_t)buf.usr_ptr, &buf_user->length); break; } case MEMREADOOB64: { struct mtd_oob_buf64 buf; struct mtd_oob_buf64 __user *buf_user = argp; if (copy_from_user(&buf, argp, sizeof(buf))) ret = -EFAULT; else ret = mtd_do_readoob(mtd, buf.start, buf.length, (void __user *)(uintptr_t)buf.usr_ptr, &buf_user->length); break; } |
1da177e4c Linux-2.6.12-rc2 |
708 709 |
case MEMLOCK: { |
175428b2b [MTD] mtdchar.c r... |
710 |
struct erase_info_user einfo; |
1da177e4c Linux-2.6.12-rc2 |
711 |
|
175428b2b [MTD] mtdchar.c r... |
712 |
if (copy_from_user(&einfo, argp, sizeof(einfo))) |
1da177e4c Linux-2.6.12-rc2 |
713 714 715 716 717 |
return -EFAULT; if (!mtd->lock) ret = -EOPNOTSUPP; else |
175428b2b [MTD] mtdchar.c r... |
718 |
ret = mtd->lock(mtd, einfo.start, einfo.length); |
1da177e4c Linux-2.6.12-rc2 |
719 720 721 722 723 |
break; } case MEMUNLOCK: { |
175428b2b [MTD] mtdchar.c r... |
724 |
struct erase_info_user einfo; |
1da177e4c Linux-2.6.12-rc2 |
725 |
|
175428b2b [MTD] mtdchar.c r... |
726 |
if (copy_from_user(&einfo, argp, sizeof(einfo))) |
1da177e4c Linux-2.6.12-rc2 |
727 728 729 730 731 |
return -EFAULT; if (!mtd->unlock) ret = -EOPNOTSUPP; else |
175428b2b [MTD] mtdchar.c r... |
732 |
ret = mtd->unlock(mtd, einfo.start, einfo.length); |
1da177e4c Linux-2.6.12-rc2 |
733 734 |
break; } |
9938424f0 mtd: add an ioctl... |
735 736 737 738 739 740 741 742 743 744 745 746 747 |
case MEMISLOCKED: { struct erase_info_user einfo; if (copy_from_user(&einfo, argp, sizeof(einfo))) return -EFAULT; if (!mtd->is_locked) ret = -EOPNOTSUPP; else ret = mtd->is_locked(mtd, einfo.start, einfo.length); break; } |
5bd34c091 [MTD] NAND Replac... |
748 |
/* Legacy interface */ |
1da177e4c Linux-2.6.12-rc2 |
749 750 |
case MEMGETOOBSEL: { |
5bd34c091 [MTD] NAND Replac... |
751 752 753 754 755 756 757 758 759 760 761 |
struct nand_oobinfo oi; if (!mtd->ecclayout) return -EOPNOTSUPP; if (mtd->ecclayout->eccbytes > ARRAY_SIZE(oi.eccpos)) return -EINVAL; oi.useecc = MTD_NANDECC_AUTOPLACE; memcpy(&oi.eccpos, mtd->ecclayout->eccpos, sizeof(oi.eccpos)); memcpy(&oi.oobfree, mtd->ecclayout->oobfree, sizeof(oi.oobfree)); |
d25ade71e [MTD] mtdchar: Fi... |
762 |
oi.eccbytes = mtd->ecclayout->eccbytes; |
5bd34c091 [MTD] NAND Replac... |
763 764 |
if (copy_to_user(argp, &oi, sizeof(struct nand_oobinfo))) |
1da177e4c Linux-2.6.12-rc2 |
765 766 767 768 769 770 771 |
return -EFAULT; break; } case MEMGETBADBLOCK: { loff_t offs; |
97894cda5 [MTD] core: Clean... |
772 |
|
1da177e4c Linux-2.6.12-rc2 |
773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 |
if (copy_from_user(&offs, argp, sizeof(loff_t))) return -EFAULT; if (!mtd->block_isbad) ret = -EOPNOTSUPP; else return mtd->block_isbad(mtd, offs); break; } case MEMSETBADBLOCK: { loff_t offs; if (copy_from_user(&offs, argp, sizeof(loff_t))) return -EFAULT; if (!mtd->block_markbad) ret = -EOPNOTSUPP; else return mtd->block_markbad(mtd, offs); break; } |
34a82443b [MTD] dataflash O... |
794 |
#ifdef CONFIG_HAVE_MTD_OTP |
31f4233ba [MTD] User interf... |
795 796 797 798 799 |
case OTPSELECT: { int mode; if (copy_from_user(&mode, argp, sizeof(int))) return -EFAULT; |
f1a28c028 [MTD] NAND Expose... |
800 801 802 803 |
mfi->mode = MTD_MODE_NORMAL; ret = otp_select_filemode(mfi, mode); |
81dba4887 [MTD] Reset file ... |
804 |
file->f_pos = 0; |
31f4233ba [MTD] User interf... |
805 806 807 808 809 810 811 812 813 814 |
break; } case OTPGETREGIONCOUNT: case OTPGETREGIONINFO: { struct otp_info *buf = kmalloc(4096, GFP_KERNEL); if (!buf) return -ENOMEM; ret = -EOPNOTSUPP; |
f1a28c028 [MTD] NAND Expose... |
815 816 |
switch (mfi->mode) { case MTD_MODE_OTP_FACTORY: |
31f4233ba [MTD] User interf... |
817 818 819 820 821 822 823 |
if (mtd->get_fact_prot_info) ret = mtd->get_fact_prot_info(mtd, buf, 4096); break; case MTD_MODE_OTP_USER: if (mtd->get_user_prot_info) ret = mtd->get_user_prot_info(mtd, buf, 4096); break; |
f1a28c028 [MTD] NAND Expose... |
824 825 |
default: break; |
31f4233ba [MTD] User interf... |
826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 |
} if (ret >= 0) { if (cmd == OTPGETREGIONCOUNT) { int nbr = ret / sizeof(struct otp_info); ret = copy_to_user(argp, &nbr, sizeof(int)); } else ret = copy_to_user(argp, buf, ret); if (ret) ret = -EFAULT; } kfree(buf); break; } case OTPLOCK: { |
175428b2b [MTD] mtdchar.c r... |
842 |
struct otp_info oinfo; |
31f4233ba [MTD] User interf... |
843 |
|
f1a28c028 [MTD] NAND Expose... |
844 |
if (mfi->mode != MTD_MODE_OTP_USER) |
31f4233ba [MTD] User interf... |
845 |
return -EINVAL; |
175428b2b [MTD] mtdchar.c r... |
846 |
if (copy_from_user(&oinfo, argp, sizeof(oinfo))) |
31f4233ba [MTD] User interf... |
847 848 849 |
return -EFAULT; if (!mtd->lock_user_prot_reg) return -EOPNOTSUPP; |
175428b2b [MTD] mtdchar.c r... |
850 |
ret = mtd->lock_user_prot_reg(mtd, oinfo.start, oinfo.length); |
31f4233ba [MTD] User interf... |
851 852 853 |
break; } #endif |
cc26c3cd3 mtd: nand: expand... |
854 |
/* This ioctl is being deprecated - it truncates the ecc layout */ |
f1a28c028 [MTD] NAND Expose... |
855 856 |
case ECCGETLAYOUT: { |
cc26c3cd3 mtd: nand: expand... |
857 |
struct nand_ecclayout_user *usrlay; |
f1a28c028 [MTD] NAND Expose... |
858 859 |
if (!mtd->ecclayout) return -EOPNOTSUPP; |
cc26c3cd3 mtd: nand: expand... |
860 861 862 863 864 865 866 867 868 |
usrlay = kmalloc(sizeof(*usrlay), GFP_KERNEL); if (!usrlay) return -ENOMEM; shrink_ecclayout(mtd->ecclayout, usrlay); if (copy_to_user(argp, usrlay, sizeof(*usrlay))) ret = -EFAULT; kfree(usrlay); |
f1a28c028 [MTD] NAND Expose... |
869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 |
break; } case ECCGETSTATS: { if (copy_to_user(argp, &mtd->ecc_stats, sizeof(struct mtd_ecc_stats))) return -EFAULT; break; } case MTDFILEMODE: { mfi->mode = 0; switch(arg) { case MTD_MODE_OTP_FACTORY: case MTD_MODE_OTP_USER: ret = otp_select_filemode(mfi, arg); break; case MTD_MODE_RAW: if (!mtd->read_oob || !mtd->write_oob) return -EOPNOTSUPP; mfi->mode = arg; case MTD_MODE_NORMAL: break; default: ret = -EINVAL; } file->f_pos = 0; break; } |
d0f7959e2 mtd: add BLKPG AP... |
903 904 905 906 907 908 909 910 911 912 913 914 915 |
case BLKPG: { ret = mtd_blkpg_ioctl(mtd, (struct blkpg_ioctl_arg __user *)arg); break; } case BLKRRPART: { /* No reread partition feature. Just return ok */ ret = 0; break; } |
d0f7959e2 mtd: add BLKPG AP... |
916 |
|
1da177e4c Linux-2.6.12-rc2 |
917 918 919 920 921 922 |
default: ret = -ENOTTY; } return ret; } /* memory_ioctl */ |
55929332c drivers: Push dow... |
923 924 925 |
static long mtd_unlocked_ioctl(struct file *file, u_int cmd, u_long arg) { int ret; |
5aa82940b mtd: autoconvert ... |
926 |
mutex_lock(&mtd_mutex); |
55929332c drivers: Push dow... |
927 |
ret = mtd_ioctl(file, cmd, arg); |
5aa82940b mtd: autoconvert ... |
928 |
mutex_unlock(&mtd_mutex); |
55929332c drivers: Push dow... |
929 930 931 |
return ret; } |
977185404 mtd: compat_ioctl... |
932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 |
#ifdef CONFIG_COMPAT struct mtd_oob_buf32 { u_int32_t start; u_int32_t length; compat_caddr_t ptr; /* unsigned char* */ }; #define MEMWRITEOOB32 _IOWR('M', 3, struct mtd_oob_buf32) #define MEMREADOOB32 _IOWR('M', 4, struct mtd_oob_buf32) static long mtd_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { struct mtd_file_info *mfi = file->private_data; struct mtd_info *mtd = mfi->mtd; |
0b6585ce0 mtd: Fix pointer ... |
948 |
void __user *argp = compat_ptr(arg); |
977185404 mtd: compat_ioctl... |
949 |
int ret = 0; |
5aa82940b mtd: autoconvert ... |
950 |
mutex_lock(&mtd_mutex); |
977185404 mtd: compat_ioctl... |
951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 |
switch (cmd) { case MEMWRITEOOB32: { struct mtd_oob_buf32 buf; struct mtd_oob_buf32 __user *buf_user = argp; if (copy_from_user(&buf, argp, sizeof(buf))) ret = -EFAULT; else ret = mtd_do_writeoob(file, mtd, buf.start, buf.length, compat_ptr(buf.ptr), &buf_user->length); break; } case MEMREADOOB32: { struct mtd_oob_buf32 buf; struct mtd_oob_buf32 __user *buf_user = argp; /* NOTE: writes return length to buf->start */ if (copy_from_user(&buf, argp, sizeof(buf))) ret = -EFAULT; else ret = mtd_do_readoob(mtd, buf.start, buf.length, compat_ptr(buf.ptr), &buf_user->start); break; } default: |
55929332c drivers: Push dow... |
982 |
ret = mtd_ioctl(file, cmd, (unsigned long)argp); |
977185404 mtd: compat_ioctl... |
983 |
} |
5aa82940b mtd: autoconvert ... |
984 |
mutex_unlock(&mtd_mutex); |
977185404 mtd: compat_ioctl... |
985 986 987 988 989 |
return ret; } #endif /* CONFIG_COMPAT */ |
402d32651 NOMMU: Present ba... |
990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 |
/* * try to determine where a shared mapping can be made * - only supported for NOMMU at the moment (MMU can't doesn't copy private * mappings) */ #ifndef CONFIG_MMU static unsigned long mtd_get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) { struct mtd_file_info *mfi = file->private_data; struct mtd_info *mtd = mfi->mtd; if (mtd->get_unmapped_area) { unsigned long offset; if (addr != 0) return (unsigned long) -EINVAL; if (len > mtd->size || pgoff >= (mtd->size >> PAGE_SHIFT)) return (unsigned long) -EINVAL; offset = pgoff << PAGE_SHIFT; if (offset > mtd->size - len) return (unsigned long) -EINVAL; return mtd->get_unmapped_area(mtd, len, offset, flags); } /* can't map directly */ return (unsigned long) -ENOSYS; } #endif /* * set up a mapping for shared memory segments */ static int mtd_mmap(struct file *file, struct vm_area_struct *vma) { #ifdef CONFIG_MMU struct mtd_file_info *mfi = file->private_data; struct mtd_info *mtd = mfi->mtd; |
dd02b67d5 mtd: mtdchar: fix... |
1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 |
struct map_info *map = mtd->priv; unsigned long start; unsigned long off; u32 len; if (mtd->type == MTD_RAM || mtd->type == MTD_ROM) { off = vma->vm_pgoff << PAGE_SHIFT; start = map->phys; len = PAGE_ALIGN((start & ~PAGE_MASK) + map->size); start &= PAGE_MASK; if ((vma->vm_end - vma->vm_start + off) > len) return -EINVAL; off += start; vma->vm_pgoff = off >> PAGE_SHIFT; vma->vm_flags |= VM_IO | VM_RESERVED; #ifdef pgprot_noncached if (file->f_flags & O_DSYNC || off >= __pa(high_memory)) vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); #endif if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, vma->vm_end - vma->vm_start, vma->vm_page_prot)) return -EAGAIN; |
402d32651 NOMMU: Present ba... |
1059 |
|
402d32651 NOMMU: Present ba... |
1060 |
return 0; |
dd02b67d5 mtd: mtdchar: fix... |
1061 |
} |
402d32651 NOMMU: Present ba... |
1062 1063 1064 1065 1066 |
return -ENOSYS; #else return vma->vm_flags & VM_SHARED ? 0 : -ENOSYS; #endif } |
d54b1fdb1 [PATCH] mark stru... |
1067 |
static const struct file_operations mtd_fops = { |
1da177e4c Linux-2.6.12-rc2 |
1068 1069 1070 1071 |
.owner = THIS_MODULE, .llseek = mtd_lseek, .read = mtd_read, .write = mtd_write, |
55929332c drivers: Push dow... |
1072 |
.unlocked_ioctl = mtd_unlocked_ioctl, |
977185404 mtd: compat_ioctl... |
1073 1074 1075 |
#ifdef CONFIG_COMPAT .compat_ioctl = mtd_compat_ioctl, #endif |
1da177e4c Linux-2.6.12-rc2 |
1076 1077 |
.open = mtd_open, .release = mtd_close, |
402d32651 NOMMU: Present ba... |
1078 1079 1080 1081 |
.mmap = mtd_mmap, #ifndef CONFIG_MMU .get_unmapped_area = mtd_get_unmapped_area, #endif |
1da177e4c Linux-2.6.12-rc2 |
1082 |
}; |
51139adac convert get_sb_ps... |
1083 1084 |
static struct dentry *mtd_inodefs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) |
cd874237d mtd: mtdchar: Do ... |
1085 |
{ |
c74a1cbb3 pass default dent... |
1086 |
return mount_pseudo(fs_type, "mtd_inode:", NULL, NULL, MTD_INODE_FS_MAGIC); |
cd874237d mtd: mtdchar: Do ... |
1087 1088 1089 1090 |
} static struct file_system_type mtd_inodefs_type = { .name = "mtd_inodefs", |
51139adac convert get_sb_ps... |
1091 |
.mount = mtd_inodefs_mount, |
cd874237d mtd: mtdchar: Do ... |
1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 |
.kill_sb = kill_anon_super, }; static void mtdchar_notify_add(struct mtd_info *mtd) { } static void mtdchar_notify_remove(struct mtd_info *mtd) { struct inode *mtd_ino = ilookup(mtd_inode_mnt->mnt_sb, mtd->index); if (mtd_ino) { /* Destroy the inode if it exists */ mtd_ino->i_nlink = 0; iput(mtd_ino); } } static struct mtd_notifier mtdchar_notifier = { .add = mtdchar_notify_add, .remove = mtdchar_notify_remove, }; |
1da177e4c Linux-2.6.12-rc2 |
1114 1115 |
static int __init init_mtdchar(void) { |
cd874237d mtd: mtdchar: Do ... |
1116 |
int ret; |
1f24b5a8e [MTD] driver mode... |
1117 |
|
cd874237d mtd: mtdchar: Do ... |
1118 |
ret = __register_chrdev(MTD_CHAR_MAJOR, 0, 1 << MINORBITS, |
dad0db318 mtdchar: Register... |
1119 |
"mtd", &mtd_fops); |
cd874237d mtd: mtdchar: Do ... |
1120 1121 1122 1123 1124 |
if (ret < 0) { pr_notice("Can't allocate major number %d for " "Memory Technology Devices. ", MTD_CHAR_MAJOR); return ret; |
9bc7b3873 [MTD] mtdchar.c: ... |
1125 |
} |
cd874237d mtd: mtdchar: Do ... |
1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 |
ret = register_filesystem(&mtd_inodefs_type); if (ret) { pr_notice("Can't register mtd_inodefs filesystem: %d ", ret); goto err_unregister_chdev; } mtd_inode_mnt = kern_mount(&mtd_inodefs_type); if (IS_ERR(mtd_inode_mnt)) { ret = PTR_ERR(mtd_inode_mnt); pr_notice("Error mounting mtd_inodefs filesystem: %d ", ret); goto err_unregister_filesystem; } register_mtd_user(&mtdchar_notifier); return ret; err_unregister_filesystem: unregister_filesystem(&mtd_inodefs_type); err_unregister_chdev: __unregister_chrdev(MTD_CHAR_MAJOR, 0, 1 << MINORBITS, "mtd"); return ret; |
1da177e4c Linux-2.6.12-rc2 |
1149 1150 1151 1152 |
} static void __exit cleanup_mtdchar(void) { |
cd874237d mtd: mtdchar: Do ... |
1153 |
unregister_mtd_user(&mtdchar_notifier); |
f03c65993 sanitize vfsmount... |
1154 |
mntput(mtd_inode_mnt); |
cd874237d mtd: mtdchar: Do ... |
1155 |
unregister_filesystem(&mtd_inodefs_type); |
dad0db318 mtdchar: Register... |
1156 |
__unregister_chrdev(MTD_CHAR_MAJOR, 0, 1 << MINORBITS, "mtd"); |
1da177e4c Linux-2.6.12-rc2 |
1157 1158 1159 1160 |
} module_init(init_mtdchar); module_exit(cleanup_mtdchar); |
1f24b5a8e [MTD] driver mode... |
1161 |
MODULE_ALIAS_CHARDEV_MAJOR(MTD_CHAR_MAJOR); |
1da177e4c Linux-2.6.12-rc2 |
1162 1163 1164 1165 |
MODULE_LICENSE("GPL"); MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); MODULE_DESCRIPTION("Direct character-device access to MTD devices"); |
90160e13b [MTD] Auto-load m... |
1166 |
MODULE_ALIAS_CHARDEV_MAJOR(MTD_CHAR_MAJOR); |