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drivers/mtd/smart.c Fixed SmartFS wear level error that occurs when the logical sector size is too small to save all wear level status bytes in a single sector. Logical sectors 1 and 2 were simply not being allocated and then the read_sector and write_sector routines were failing. From Ken Petit

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Ken Pettit
2015-11-18 18:12:06 -06:00
committed by Gregory Nutt
parent 678eb7b78b
commit 7b590ec9a2
3 changed files with 52 additions and 14 deletions
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ChangeLog
+5
View File
@@ -11119,4 +11119,9 @@
* configs/same70-xplained: Add basic NSH configuration for the SAME70
Xplained board. Initial commit is just the SAMV71-XULT files with
names changed appropriately (2015-11-18).
* drivers/mtd/smart.c: Fixed SmartFS wear level error that occurs when
the logical sector size is too small to save all wear level status
bytes in a single sector. Logical sectors 1 and 2 were simply not
being allocated and then the read_sector and write_sector routinesi
were failing. From Ken Petit (2015-11-18).
configs
+1 -1
Submodule configs updated: 8615cb1106...165837ff2a
drivers/mtd/smart.c
+46 -13
View File
@@ -3,7 +3,7 @@
*
* Sector Mapped Allocation for Really Tiny (SMART) Flash block driver.
*
* Copyright (C) 2013-2014 Ken Pettit. All rights reserved.
* Copyright (C) 2013-2015 Ken Pettit. All rights reserved.
* Author: Ken Pettit <pettitkd@gmail.com>
*
* Redistribution and use in source and binary forms, with or without
@@ -372,6 +372,8 @@ static int smart_findfreephyssector(FAR struct smart_struct_s *dev, uint8_t canr
#ifdef CONFIG_FS_WRITABLE
static int smart_writesector(FAR struct smart_struct_s *dev, unsigned long arg);
static inline int smart_allocsector(FAR struct smart_struct_s *dev,
unsigned long requested);
#endif
static int smart_readsector(FAR struct smart_struct_s *dev, unsigned long arg);
@@ -381,7 +383,7 @@ static int smart_relocate_static_data(FAR struct smart_struct_s *dev, uint16_t b
#endif
static int smart_relocate_sector(FAR struct smart_struct_s *dev,
uint16_t oldsector, uint16_t newsector);
uint16_t oldsector, uint16_t newsector);
/****************************************************************************
* Private Data
@@ -3782,9 +3784,9 @@ static int smart_write_wearstatus(struct smart_struct_s *dev)
/* Calculate the number of bytes to write to this sector */
towrite = remaining;
if (towrite > dev->sectorsize - SMARTFS_FMT_WEAR_POS)
if (towrite > dev->sectorsize - (SMARTFS_FMT_WEAR_POS + sizeof(struct smart_sect_header_s)))
{
towrite = dev->sectorsize - SMARTFS_FMT_WEAR_POS;
towrite = dev->sectorsize - (SMARTFS_FMT_WEAR_POS + sizeof(struct smart_sect_header_s));
}
/* Setup the sector write request (we are our own client) */
@@ -3843,19 +3845,20 @@ errout:
#ifdef CONFIG_MTD_SMART_WEAR_LEVEL
static inline int smart_read_wearstatus(FAR struct smart_struct_s *dev)
{
uint16_t sector;
uint16_t remaining, toread;
struct smart_read_write_s req;
int ret;
uint8_t buffer[8];
uint16_t sector, physsector;
uint16_t remaining, toread;
uint8_t buffer[8];
int ret;
/* Prepare to read the total block erases and uneven wearcount values */
sector = 0;
sector = 0;
req.logsector = sector;
req.offset = SMARTFS_FMT_WEAR_POS - 8;
req.count = sizeof(buffer);
req.buffer = buffer;
req.offset = SMARTFS_FMT_WEAR_POS - 8;
req.count = sizeof(buffer);
req.buffer = buffer;
ret = smart_readsector(dev, (unsigned long) &req);
if (ret != sizeof(buffer))
{
@@ -3908,6 +3911,29 @@ static inline int smart_read_wearstatus(FAR struct smart_struct_s *dev)
req.buffer = &dev->wearstatus[(dev->geo.neraseblocks >> SMART_WEAR_BIT_DIVIDE) -
remaining];
/* Validate wear status sector has been allocated */
#ifndef CONFIG_MTD_SMART_MINIMIZE_RAM
physsector = dev->sMap[req.logsector];
#else
physsector = smart_cache_lookup(dev, req->logsector);
#endif
if ((sector != 0) && (physsector == 0xFFFF))
{
#ifdef CONFIG_FS_WRITABLE
/* This logical sector does not exist yet. We must allocate it */
ret = smart_allocsector(dev, sector);
if (ret != sector)
{
fdbg("Unable to allocate wear level status sector %d\n", sector);
ret = -EINVAL;
goto errout;
}
#endif
}
/* Read the sector */
ret = smart_readsector(dev, (unsigned long) &req);
@@ -4690,7 +4716,7 @@ static inline int smart_allocsector(FAR struct smart_struct_s *dev,
* sector if it isn't already in use.
*/
if ((requested > 2) && (requested < dev->totalsectors))
if ((requested > 0) && (requested < dev->totalsectors))
{
/* Validate the sector is not already allocated */
@@ -5059,6 +5085,13 @@ static int smart_ioctl(FAR struct inode *inode, int cmd, unsigned long arg)
case BIOC_ALLOCSECT:
/* Ensure the FS is not trying to allocate a reserved sector */
if (arg < 3)
{
arg = (unsigned long) -1;
}
/* Allocate a logical sector for the upper layer file system */
ret = smart_allocsector(dev, arg);