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stl_block.c
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stl_block.c
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/*
*---------------------------------------------------------------------------*
* *
* COPYRIGHT. SAMSUNG ELECTRONICS CO., LTD. *
* ALL RIGHTS RESERVED *
* *
* Permission is hereby granted to licensees of Samsung Electronics Co., *
* Ltd. products to use this computer program only in accordance with the *
* terms of the SAMSUNG FLASH MEMORY DRIVER SOFTWARE LICENSE AGREEMENT. *
* *
*---------------------------------------------------------------------------*
*/
/**
* @version LinuStoreIII_1.2.0_b035-FSR_1.2.1p1_b129_RC
* @file drivers/fsr/stl_block.c
* @brief This file is STL common part to adopt FSR in linux
* It provides block device operations
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/hdreg.h>
#include <linux/proc_fs.h>
#include <asm/errno.h>
#include <asm/uaccess.h>
#include "fsr_base.h"
static unsigned int stl_open_count[FSR_MAX_VOLUMES][MAX_FLASH_PARTITIONS] = {{0,},};
#define MAJOR_NR BLK_DEVICE_BML
static u32 STL_start_sector;
static u32 STL_nsectors;
static u32 STL_nTotal_sectors;
static int stl_setup_spec(u32 volume, u32 partno, stl_info_t *ssp)
{
u32 tmp, len, part_id;
int ret;
DEBUG(DL3,"STL[I]: volume(%d), partno(%d)\n",volume, partno);
part_id = fsr_part_id(fsr_get_part_spec(volume), partno);
FSR_DOWN(&fsr_mutex);
ret = FSR_STL_IOCtl(volume, part_id, FSR_STL_IOCTL_LOG_SECTS, NULL,
sizeof(u32), &tmp, sizeof(u32), &len);
FSR_UP(&fsr_mutex);
/* I/O error */
if (ret != FSR_STL_SUCCESS)
{
ERRPRINTK("FSR_STL_IOCtl error[0x%08x]\n", ret);
return -EINVAL;
}
DEBUG(DL2,"volume(%d), partno(%d) total_sectors(%d)", volume, partno, tmp);
ssp->total_sectors = tmp;
FSR_DOWN(&fsr_mutex);
ret = FSR_STL_IOCtl(volume, part_id, FSR_STL_IOCTL_PAGE_SIZE, NULL,
sizeof(u32), &tmp, sizeof(u32), &len);
FSR_UP(&fsr_mutex);
/* I/O error */
if (ret != FSR_STL_SUCCESS)
{
ERRPRINTK("FSR_STL_IOCtl error[0x%08x]\n", ret);
return -EINVAL;
}
DEBUG(DL2,"volume(%d), partno(%d) page_size(%d)", volume, partno, tmp);
ssp->page_size = tmp;
DEBUG(DL2,"total_sectors(%d), page_size(%d)",ssp->total_sectors, ssp->page_size);
DEBUG(DL3,"STL[O]: volume(%d), partno(%d)\n",volume, partno);
return 0;
}
/**
* stl_do_ioctl - ioctl to format the device
* @param volume volume number
* @param partno partition number
* @param cmd IOCTL CMD for STL (include/linux/fsr_if.h)
* @param arg argument from user space
* @return 0 on success, otherwise on failure
*/
static int stl_do_ioctl(u32 volume, u32 partno, u32 cmd, u32 arg)
{
u32 part_id;
int ret;
FSRStlInfo info;
stl_info_t *stl;
FSRVolSpec *vs;
FSRPartI *pi;
vs = fsr_get_vol_spec(volume);
pi = fsr_get_part_spec(volume);
DEBUG(DL3,"STL[I]: volume(%d), partno(%d), cmd(%x)\n",volume, partno, cmd);
part_id = fsr_part_id(fsr_get_part_spec(volume), partno);
switch (cmd)
{
case STL_FORMAT:
{
u32 minor; ///< minor number
FSRStlFmtInfo STLFmt; ///< stl format info passed to stl layer
STL_FORMAT_INFO_T * stUsrSTLInfo; ///< temp structure
stUsrSTLInfo = (STL_FORMAT_INFO_T *) kmalloc(sizeof(STL_FORMAT_INFO_T), GFP_KERNEL);
if (!stUsrSTLInfo)
{
ERRPRINTK("kmalloc error\n");
return -ENOMEM;
}
memset(stUsrSTLInfo, 0, sizeof(STL_FORMAT_INFO_T));
if ( copy_from_user((char *)stUsrSTLInfo, (char *)arg, sizeof(STL_FORMAT_INFO_T)))
{
ERRPRINTK("Can not copry from user memory to stUsrSTLInfo.");
return -EIO;
}
STLFmt.nOpt = FSR_STL_FORMAT_REMEMBER_ECNT;
STLFmt.nAvgECnt = 0;
STLFmt.nNumOfECnt = 0;
STLFmt.pnECnt = NULL;
// support for FSR_1.2.0 above
if (stUsrSTLInfo->nNumOfInitFreeUnits > 1)
{
STLFmt.nOpt |= FSR_STL_FORMAT_SET_NUM_INITFREE;
STLFmt.nNumOfInitFreeUnits = stUsrSTLInfo->nNumOfInitFreeUnits;
}
DEBUG(DL2,"STLFmt.nNumOfInitFreeUnits : %d\n", STLFmt.nNumOfInitFreeUnits);
FSR_DOWN(&fsr_mutex);
ret = FSR_STL_Format(volume, part_id, &STLFmt);
FSR_UP(&fsr_mutex);
if (ret != FSR_STL_SUCCESS)
{
ERRPRINTK("FSR_STL_Format Error in STL_FORMAT. [0x%08x]", ret);
return -EIO;
}
/* update the STL instance */
FSR_DOWN(&fsr_mutex);
ret = FSR_STL_Open(volume, part_id, &info, FSR_STL_FLAG_DEFAULT);
FSR_UP(&fsr_mutex);
DEBUG(DL2,"STL_Open: SPU: %d, SECTS:%d",info.nLogSctsPerUnit , info.nTotalLogScts);
if (ret != FSR_STL_SUCCESS)
{
ERRPRINTK("FSR_STL_Open Error in STL_FORMAT. [0x%08x]", ret);
return -EIO;
}
stl = fsr_get_stl_info(volume, partno);
stl_setup_spec(volume, partno, stl);
STL_nTotal_sectors = fsr_stl_sectors_nr(stl);
stUsrSTLInfo->nTotalSectors = STL_nTotal_sectors;
ret = (int) copy_to_user((char *)arg, (char *)stUsrSTLInfo, sizeof(STL_FORMAT_INFO_T));
if( ret < 0)
{
ERRPRINTK("Can not put stl total sectors to user variable [0x%08x]", ret);
return -EIO;
}
FSR_DOWN(&fsr_mutex);
ret = FSR_STL_Close(volume, part_id);
FSR_UP(&fsr_mutex);
if (ret != FSR_STL_SUCCESS)
{
ERRPRINTK("FSR_STL_Close Error in STL_FORMAT. [0x%08x]", ret);
}
minor = fsr_minor(volume, partno);
ret = stl_update_blkdev_param(minor, fsr_stl_sectors_nr(stl) >> 0x1,
fsr_stl_page_size(stl));
if (ret != FSR_STL_SUCCESS)
{
ERRPRINTK("Can not update stl blkdev parameters. [0x%08x]", ret);
return -ENODEV;
}
return ret;
}
case FSR_IS_WHOLE_DEV:
{
/* if (ret == 0) => partial device, else => whole partition */
ret = fsr_is_whole_dev(partno);
DEBUG(DL1, "fsr_is_whole_dev return value is [0x%x]\n", ret);
return ret;
}
case FSR_GET_LS_VERSION:
{
ret = (int) copy_to_user((char *)((VERSION_CHECK_T *)arg)->driver_version,
(char *)&LINUSTOREIII_VERSION_STRING,
strlen(LINUSTOREIII_VERSION_STRING));
return ret;
}
case FSR_GET_PART_TAB:
{
BML_PARTTAB_T *kparts;
kparts = (BML_PARTTAB_T *) kmalloc(sizeof(BML_PARTTAB_T), GFP_KERNEL);
if (!kparts)
{
ERRPRINTK("kmalloc error\n");
return -ENOMEM;
}
memset(kparts, 0, sizeof(BML_PARTTAB_T));
fsr_read_partitions(volume, kparts);
ret = (int) copy_to_user((char *)arg, (char *)kparts,
sizeof(BML_PARTTAB_T));
/* memory error */
if (ret < 0)
{
ERRPRINTK("copy_to_user error [0x%08x]", ret);
kfree(kparts);
return -EIO;
}
ret = fsr_update_vol_spec(volume);
if (ret)
{
ERRPRINTK("fsr_update_vol_spec FAIL\r\n");
kfree(kparts);
return -EINVAL;
}
kfree(kparts);
return ret;
}
case FSR_GET_PART_INFO:
{
BML_DEVINFO_T info;
DEBUG(DL3, "IN FSR_GET_PART_INFO : 0x%x\n", cmd);
if (fsr_is_whole_dev(partno))
{
info.num_units = fsr_vol_unit_nr(vs);
}
else
{
info.num_units = fsr_part_units_nr(pi, partno);
}
info.phy_unit_size = fsr_vol_unitsize(volume, partno);
info.dump_size = vs->nSizeOfDumpBuf << 1;
info.page_msize = fsr_vol_spp(vs) << SECTOR_BITS;
DEBUG(DL3, "OUT FSR_GET_PART_INFO : 0x%x\n", cmd);
return copy_to_user((char *) arg, (char *) &info,
sizeof (BML_DEVINFO_T));
}
/* out-of-range input */
default:
return -EINVAL;
}
DEBUG(DL3,"STL[O]: volume(%d), partno(%d), cmd(%x)\n",volume, partno, cmd);
return 0;
}
/**
* STL raw block I/O control
* @param inode block device inode
* @param file block device file
* @param cmd IOCTL command - ref. include/linux/fsr_if.h
* @param arg argument from user
* @return 0 on success, otherwise on failure
*/
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
static int stl_block_ioctl(struct block_device *bdev, fmode_t mode,
u32 cmd, unsigned long arg)
{
u32 minor = MINOR(bdev->bd_dev);
#else
static int stl_block_ioctl(struct inode *inode, struct file *file,
unsigned cmd, unsigned long arg)
{
u32 minor = MINOR(inode->i_rdev);
#endif
u32 volume = fsr_vol(minor);
u32 partno = fsr_part(minor);
u32 part_id;
int ret = 0;
stl_info_t *stl;
part_id = fsr_part_id(fsr_get_part_spec(volume), partno);
DEBUG(DL3,"volume(%d), minor(%d), cmd(%x)\n", volume, minor, cmd);
switch (cmd)
{
case STL_GET_NUM_OF_SECTORS:
{
DEBUG(DL2,"STL_GET_NUM_OF_SECTORS");
stl = fsr_get_stl_info(volume, partno);
stl_setup_spec(volume, partno, stl);
STL_nTotal_sectors = fsr_stl_sectors_nr(stl);
DEBUG(DL2,"STL_nTotal_sectors : %d", STL_nTotal_sectors);
return put_user(STL_nTotal_sectors, (u32 *)arg);
}
case STL_DUMP:
{
u8 *pBuf;
// if read data exceed partition size,
// read data size is set not to exceed partition size.
STL_nsectors = (MAX_STL_OPERATION_BUFFER_SIZE >> SECTOR_BITS);
DEBUG(DL1,"MAX_STL_OPERATION_BUFFER_SIZE : %d, SECTOR_BITS : %d, STL_nsectors : %d\n",
MAX_STL_OPERATION_BUFFER_SIZE, SECTOR_BITS, STL_nsectors);
if (STL_nTotal_sectors < (STL_start_sector + STL_nsectors))
{
STL_nsectors = STL_nTotal_sectors - STL_start_sector;
}
DEBUG(DL1,"part_id : %d, STL_start_sector : %d, STL_nsectors : %d\n",
part_id, STL_start_sector, STL_nsectors);
if (STL_nsectors == 0)
{
ERRPRINTK("Can not access address\n");
return -EFAULT;
}
// allocate buffer
pBuf = kmalloc(MAX_STL_OPERATION_BUFFER_SIZE, GFP_KERNEL);
if (pBuf == NULL)
{
ERRPRINTK("pBuf memory is not allocated\n");
return -ENOMEM;
}
memset(pBuf, 0xFF, MAX_STL_OPERATION_BUFFER_SIZE);
FSR_DOWN(&fsr_mutex);
ret = FSR_STL_Read(volume, part_id, STL_start_sector, STL_nsectors, pBuf, FSR_STL_FLAG_DEFAULT);
FSR_UP(&fsr_mutex);
if ( ret != FSR_STL_SUCCESS )
{
ERRPRINTK("STL_Read Error in STL_DUMP [0x%08x]", ret);
kfree(pBuf);
return -EIO;
}
// copy to user memory
ret = copy_to_user((char *)arg, (char *)pBuf, MAX_STL_OPERATION_BUFFER_SIZE);
if (0 > ret)
{
ERRPRINTK("copy_to_user Error in STL_DUMP [0x%08x]", ret);
kfree(pBuf);
return -EIO;
}
STL_start_sector += STL_nsectors;
kfree(pBuf);
return FSR_STL_SUCCESS;
}
case STL_RESTORE:
{
u8 *pBuf;
// if written data exceed partition size,
// written data size is set not to exceed partition size.
STL_nsectors = (MAX_STL_OPERATION_BUFFER_SIZE >> SECTOR_BITS);
if (STL_nTotal_sectors < STL_start_sector + STL_nsectors)
{
STL_nsectors = STL_nTotal_sectors - STL_start_sector;
}
if (STL_nsectors == 0)
{
ERRPRINTK("Can not access address\n");
return FSR_STL_SUCCESS;
}
// allocate buffer
pBuf = kmalloc(MAX_STL_OPERATION_BUFFER_SIZE, GFP_KERNEL);
if (pBuf == NULL)
{
ERRPRINTK("pBuf memory is not allocated");
return -ENOMEM;
}
// copy from user memory
if (copy_from_user((char *)pBuf, (char *)arg,
MAX_STL_OPERATION_BUFFER_SIZE))
{
ERRPRINTK("copy_from_user Error in STL_RESTORE\n");
kfree(pBuf);
return -EIO;
}
FSR_DOWN(&fsr_mutex);
ret = FSR_STL_Write(volume, part_id, STL_start_sector, STL_nsectors, pBuf, FSR_STL_FLAG_DEFAULT);
FSR_UP(&fsr_mutex);
if ( 0 > ret )
{
ERRPRINTK("STL_Write Error in STL_RESTORE. [0x%08x]\n", ret);
kfree(pBuf);
return -EIO;
}
STL_start_sector += STL_nsectors;
kfree(pBuf);
return FSR_STL_SUCCESS;
}
case STL_INIT_VARIABLES:
{
STL_start_sector = 0;
STL_nsectors = 0;
STL_nTotal_sectors = 0;
return FSR_STL_SUCCESS;
}
case STL_CHANGE_PART_ATTR:
{
u32 nFlags;
FSRChangePA *kparts;
kparts = (FSRChangePA *) kmalloc(sizeof(FSRChangePA), GFP_KERNEL);
if (!kparts)
{
ERRPRINTK("Can not alloc memory in STL_CHANGE_PART_ATTR cmd\n");
return -ENOMEM;
}
memset(kparts, 0x0, sizeof(FSRChangePA));
ret = (int) copy_from_user((char *)kparts, (char *)arg,
sizeof(FSRChangePA));
if (kparts->nNewAttr == FSR_BML_PI_ATTR_RW)
{
DEBUG(DL0, "FSR_STL_FLAG_OPEN_READWRITE\n");
nFlags = FSR_STL_FLAG_OPEN_READWRITE;
}
else if (kparts->nNewAttr == FSR_BML_PI_ATTR_RO)
{
DEBUG(DL0, "FSR_STL_FLAG_OPEN_READONLY\n");
nFlags = FSR_STL_FLAG_OPEN_READONLY;
}
else
{
ERRPRINTK("Invalid ATTR [New attribute : 0x%08x", kparts->nNewAttr);
return -EIO;
}
DEBUG(DL2, "kparts->nPartID : %d, nFlags : 0x%08x\n", kparts->nPartID, nFlags);
ret = FSR_STL_IOCtl(volume,
kparts->nPartID,
FSR_STL_IOCTL_CHANGE_PART_ATTR,
&nFlags,
sizeof(u32),
NULL,
0,
NULL);
/* I/O error */
if (ret != FSR_STL_SUCCESS)
{
ERRPRINTK("FSR_STL_CHANGE_PART_ATTR Fail : 0x%x", ret);
return -EIO;
}
ret = fsr_update_vol_spec(volume);
if (ret)
{
ERRPRINTK("fsr_update_vol_spec FAIL\r\n");
return -EINVAL;
}
return ret;
}
case STL_GET_MAJOR_NUMBER:
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
u32 major_nr = MAJOR(bdev->bd_dev);
#else
u32 major_nr = MAJOR(inode->i_rdev);
#endif
DEBUG(DL3, "IN STL_GET_MAJOR_NUMBER : 0x%x", cmd);
ret = put_user(major_nr, (u32 *)arg);
/* memory error */
if (ret)
{
ERRPRINTK("copy_to_user error [0x%08x]", ret);
ret = -EFAULT;
break;
}
DEBUG(DL3, "OUT STL_GET_MAJOR_NUMBER : 0x%x", cmd);
return 0;
}
case STL_GET_MINOR_NUMBER:
{
u32 minor_nr = minor;
if (minor_nr > MAX_FLASH_PARTITIONS)
{
minor_nr = minor - (0x1 << PARTITION_BITS);
}
DEBUG(DL3, "IN STL_GET_MINOR_NUMBER : 0x%x", cmd);
ret = put_user(minor_nr, (u32 *)arg);
/* memory error */
if (ret)
{
ERRPRINTK("copy_to_user error [0x%08x]", ret);
ret = -EFAULT;
break;
}
DEBUG(DL3, "OUT BML_GET_MINOR_NUMBER : 0x%x", cmd);
return 0;
}
case FSR_GET_LS_VERSION:
case FSR_GET_PART_INFO:
case FSR_GET_PART_TAB:
case FSR_IS_WHOLE_DEV:
{
DEBUG(DL3, "volume : %d, partno : %d, command : 0x%0x", volume, partno, cmd);
ret = stl_do_ioctl(volume, partno, cmd, arg);
return ret;
}
/* out-of-range input */
default:
{
return -EINVAL;
}
}
return 0;
}
/**
* STL block open interface
* @return 0 on success, otherwise on failure
*/
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
static int stl_block_open(struct block_device *bdev, fmode_t mode)
{
u32 volume, minor, partno, part_id;
u32 ret;
FSRStlInfo info;
DECLARE_TIMER;
minor = MINOR(bdev->bd_dev);
#else
static int stl_block_open(struct inode *inode, struct file *file)
{
u32 volume, minor, partno, part_id;
u32 ret;
FSRStlInfo info;
DECLARE_TIMER;
minor = MINOR(inode->i_rdev);
#endif
volume = fsr_vol(minor);
partno = fsr_part(minor);
DEBUG(DL3,"STL[I]: volume(%d), partno(%d)\n",volume, partno);
if (volume >= FSR_MAX_VOLUMES)
{
ERRPRINTK("out of the volume number\n");
return -ENODEV;
}
part_id = fsr_part_id(fsr_get_part_spec(volume), partno);
if (fsr_is_whole_dev(partno))
{
ERRPRINTK("Invalid partition number\n");
return -EINVAL;
}
START_TIMER();
FSR_DOWN(&fsr_mutex);
ret = FSR_STL_Open(volume, part_id, &info, FSR_STL_FLAG_DEFAULT);
FSR_UP(&fsr_mutex);
STOP_TIMER("STL_Open");
if (ret == FSR_STL_PARTITION_ALREADY_OPENED)
{
stl_open_count[volume][partno + 1]++;
return 0;
}
else if(ret != FSR_STL_SUCCESS)
{
ERRPRINTK("STL: open error = %x\n", ret);
return -EINVAL;
}
do
{
stl_info_t *stl = fsr_get_stl_info(volume, partno);
START_TIMER();
stl_setup_spec(volume, partno, stl);
STOP_TIMER("stl_setup_spec:");
stl_update_blkdev_param(minor,
fsr_stl_sectors_nr(stl) >> 0x1,
fsr_stl_page_size(stl));
} while (0);
DEBUG(DL3,"STL[O]: volume(%d), partno(%d)\n",volume, partno);
return 0;
}
/**
* STL block release interface
* @return 0 on success, otherwise on failure
*/
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
static int stl_block_release(struct gendisk *disk, fmode_t mode)
{
u32 volume, minor, partno, part_id;
int ret;
minor = disk->first_minor;
#else
static int stl_block_release(struct inode *inode, struct file *file)
{
u32 volume, minor, partno, part_id;
int ret;
minor = MINOR(inode->i_rdev);
#endif
volume = fsr_vol(minor);
partno = fsr_part(minor);
DEBUG(DL3,"STL[I]: volume(%d), partno(%d)\n",volume, partno);
part_id = fsr_part_id(fsr_get_part_spec(volume), partno);
if (fsr_is_whole_dev(partno))
return -EINVAL;
if (stl_open_count[volume][partno + 1] > 0)
{
stl_open_count[volume][partno + 1]--;
return 0;
}
FSR_DOWN(&fsr_mutex);
ret = FSR_STL_Close(volume, part_id);
FSR_UP(&fsr_mutex);
if (ret != FSR_STL_SUCCESS)
{
ERRPRINTK("FSR_STL_Close error[0x%08x]\n", ret);
return -ENODEV;
}
DEBUG(DL3,"STL[O]: volume(%d), partno(%d)\n",volume, partno);
return 0;
}
/**
* STL common block device operations
*/
static struct block_device_operations stl_block_fops =
{
.owner = THIS_MODULE,
.open = stl_block_open,
.release = stl_block_release,
.ioctl = stl_block_ioctl,
};
/**
* return block device operations
* @return : STL common block device operations
*/
struct block_device_operations *stl_get_block_device_operations(void)
{
return &stl_block_fops;
}
/**
* Remove unnecessary STL map
* @param dev major, minor
* @param start start unit to delete
* @param nums numbers of unit to delete
* @param b_size unit size
* @return 0 on success, otherwise on failure
*/
static int stl_delete(dev_t dev, u32 start, u32 nums, u32 b_size)
{
u32 volume, partno, part_id, count;
u32 minor = MINOR(dev);
int ret;
volume = fsr_vol(minor);
partno = fsr_part(minor);
DEBUG(DL3,"STL[I]: volume(%d), partno(%d)\n",volume, partno);
count = b_size >> SECTOR_BITS;
start = start * count;
nums = nums * count;
part_id = fsr_part_id(fsr_get_part_spec(volume), partno);
FSR_DOWN(&fsr_mutex);
ret = FSR_STL_Delete(volume, part_id, start, nums, FSR_STL_FLAG_USE_SM);
FSR_UP(&fsr_mutex);
DEBUG(DL2,"@: %d, %d - 0x%08x", start, nums, ret);
/* I/O error */
if (ret != FSR_STL_SUCCESS)
{
ERRPRINTK("FSR_STL_Delete error[0x%08x]\n", ret);
return -1;
}
DEBUG(DL3,"STL[O]: volume(%d), partno(%d)\n",volume, partno);
return 0;
}
#if defined(CONFIG_LINUSTOREIII_DEBUG) && defined(CONFIG_PROC_FS)
/**
* Open the STL device as default option
* @param volume volume number
* @param partno partition number
* @return 0 on success, ohter on failure
*/
static int stl_open(u32 volume, u32 partno)
{
int ret;
u32 part_id;
FSRStlInfo info;
FSRPartI *pi = fsr_get_part_spec(volume);
part_id = fsr_part_id(pi, partno);
DEBUG(DL3,"STL[I]: volume(%d), partno(%d)\n",volume, partno);
FSR_DOWN(&fsr_mutex);
ret = FSR_STL_Open(volume, part_id, &info, FSR_STL_FLAG_DEFAULT);
FSR_UP(&fsr_mutex);
if (ret == FSR_STL_PARTITION_ALREADY_OPENED)
{
DEBUG(DL0,"STL: Device is busy\n");
}
else if (ret == FSR_STL_UNFORMATTED)
{
DEBUG(DL0,"STL: Device is unformatted\n");
}
else if (ret != FSR_STL_SUCCESS)
{
DEBUG(DL0,"STL: Out of device : %X\n", ret);
}
DEBUG(DL3,"STL[O]: volume(%d), partno(%d)\n",volume, partno);
return ret;
}
#include <linux/seq_file.h>
struct stl_ecount_info
{
int volume;
int partno;
int unit;
int open;
};
static struct stl_ecount_info stl_proc_ecount = {-1, -1, 0, 0};
#define SET_STL_PROC_VAL(v, p, o) \
{ \
stl_proc_ecount.volume = v; \
stl_proc_ecount.partno = p; \
stl_proc_ecount.open = o; \
stl_proc_ecount.unit = 0; \
}
/**
* Close the STL device
* @param volume volume number
* @param partno partition number
* @return 0 on success, ohter on failure
*/
static int stl_close(u32 volume, u32 partno)
{
int ret;
u32 part_id;
FSRPartI *pi;
DEBUG(DL3,"STL[I]: volume(%d), partno(%d)\n",volume, partno);
pi = fsr_get_part_spec(volume);
part_id = fsr_part_id(pi, partno);
FSR_DOWN(&fsr_mutex);
ret = FSR_STL_Close(volume, part_id);
FSR_UP(&fsr_mutex);
DEBUG(DL3,"STL[O]: volume(%d), partno(%d)\n",volume, partno);
return ret;
}
/**
* get a volume and partition number to show ecount
* @param file unused
* @param buffer user buffer
* @param count data len
* @param data unused
*/
#define MAX_TEMP_LEN 20
static ssize_t proc_stl_write(struct file *file, const char *buffer,
size_t count, loff_t *ppos)
{
char kbuf[MAX_TEMP_LEN + 1], *start, *end;
int volume, partno, ret;
if (count > MAX_TEMP_LEN)
{
/* out-of-range input */
ERRPRINTK("out of range input\n");
return -EINVAL;
}
if (copy_from_user(&kbuf, buffer, count))
{
/* memory error */
ERRPRINTK("Copy from user error\n");
return -EFAULT;
}
kbuf[MAX_TEMP_LEN] = '\0';
start = kbuf;
end = strchr(kbuf, ' ');
if (!end)
{
ERRPRINTK("stchar error\n");
return -EINVAL;
}
volume = simple_strtol(start, &end, 10);
start = end + 1;
end = &kbuf[MAX_TEMP_LEN];
partno = simple_strtol(start, &end, 10);
partno --;
if (volume >= FSR_MAX_VOLUMES || partno >= FSR_BML_MAX_PARTENTRY)
{
/* out-of-range input */
ERRPRINTK("out of device\n");
return -EINVAL;
}
ret = stl_open(volume, partno);
if (ret != FSR_STL_SUCCESS)
{
SET_STL_PROC_VAL(-1, -1, 1);
return count;
}
stl_close(volume, partno);
SET_STL_PROC_VAL(volume, partno, 0);
/* Find the cache in the chain of caches. */
return count;
}
/**
* initialize the sequentail file
* @param m sequential file
* @param pos the count for loop
* @return the pointer for first entry, NULL on error
*/
static void *stl_seq_start(struct seq_file *m, loff_t *pos)
{
int ret, i;
u32 part_id, nr_unit, *erase_unit, len;
FSRPartI *pi;
if (stl_proc_ecount.volume < 0 || stl_proc_ecount.partno < 0)
{
ERRPRINTK("out of input value\n");
return NULL;
}
if (stl_proc_ecount.volume >= FSR_MAX_VOLUMES ||
stl_proc_ecount.partno >= MAX_FLASH_PARTITIONS)
{
ERRPRINTK("out of input value\n");
return NULL;
}
if (!stl_proc_ecount.open)
{
if (stl_open(stl_proc_ecount.volume, stl_proc_ecount.partno))
{
ERRPRINTK("out of input value\n");
return NULL;
}
stl_proc_ecount.open = 1;
DEBUG(DL0,"%d th partition\nUnit Erase Count\n", (stl_proc_ecount.partno + 1) & PARTITION_MASK);
}
pi = fsr_get_part_spec(stl_proc_ecount.volume);
part_id = fsr_part_id(pi, stl_proc_ecount.partno);
nr_unit = fsr_part_units_nr(pi, stl_proc_ecount.partno);
erase_unit = FSR_OAM_Malloc(sizeof(u32) * nr_unit);
do
{
FSR_DOWN(&fsr_mutex);
ret = FSR_STL_IOCtl(stl_proc_ecount.volume, part_id, FSR_STL_IOCTL_READ_ECNT,
NULL, 0,
erase_unit, sizeof(u32) * nr_unit,
&len);
FSR_UP(&fsr_mutex);
if (ret != FSR_STL_SUCCESS)
{
break;
}
for(i = 0; i < nr_unit; i++)
{
DEBUG(DL0,"%4d\t%4d\n", i, erase_unit[i] & (~FSR_STL_META_MARK));
}
} while(0);
if(erase_unit)
{
FSR_OAM_Free(erase_unit);
}
stl_close(stl_proc_ecount.volume, stl_proc_ecount.partno);
SET_STL_PROC_VAL(-1, -1, 0);
return NULL;
}
/**
* cleanup sequentail file
* @param m sequential file
* @param p entry
* @return NULL
*/
static void stl_seq_stop(struct seq_file *m, void *p)
{
return;
}
/**