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[JFFS2] Teach JFFS2 about Sibley flash

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Intels Sibley flash needs JFFS2 write buffer functionality

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Nicolas Pitre 2005-08-06 05:51:33 +01:00 committed by Thomas Gleixner
parent e102d54abf
commit 59da721a22
3 changed files with 46 additions and 5 deletions
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16
fs/jffs2/fs.c
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@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
* $Id: fs.c,v 1.61 2005/07/24 15:29:56 dedekind Exp $
* $Id: fs.c,v 1.62 2005/08/06 04:51:30 nico Exp $
*
*/
@ -664,7 +664,14 @@ static int jffs2_flash_setup(struct jffs2_sb_info *c) {
if (ret)
return ret;
}
/* and Intel "Sibley" flash */
if (jffs2_nor_wbuf_flash(c)) {
ret = jffs2_nor_wbuf_flash_setup(c);
if (ret)
return ret;
}
return ret;
}
@ -683,4 +690,9 @@ void jffs2_flash_cleanup(struct jffs2_sb_info *c) {
if (jffs2_dataflash(c)) {
jffs2_dataflash_cleanup(c);
}
/* and Intel "Sibley" flash */
if (jffs2_nor_wbuf_flash(c)) {
jffs2_nor_wbuf_flash_cleanup(c);
}
}

13
fs/jffs2/os-linux.h
View File

@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
* $Id: os-linux.h,v 1.59 2005/07/17 11:13:46 dedekind Exp $
* $Id: os-linux.h,v 1.60 2005/08/06 04:51:30 nico Exp $
*
*/
@ -85,16 +85,21 @@ static inline void jffs2_init_inode_info(struct jffs2_inode_info *f)
#define jffs2_wbuf_process NULL
#define jffs2_nor_ecc(c) (0)
#define jffs2_dataflash(c) (0)
#define jffs2_nor_wbuf_flash(c) (0)
#define jffs2_nor_ecc_flash_setup(c) (0)
#define jffs2_nor_ecc_flash_cleanup(c) do {} while (0)
#define jffs2_dataflash_setup(c) (0)
#define jffs2_dataflash_cleanup(c) do {} while (0)
#define jffs2_nor_wbuf_flash_setup(c) (0)
#define jffs2_nor_wbuf_flash_cleanup(c) do {} while (0)
#else /* NAND and/or ECC'd NOR support present */
#define jffs2_is_writebuffered(c) (c->wbuf != NULL)
#define SECTOR_ADDR(x) ( ((unsigned long)(x) / (unsigned long)(c->sector_size)) * c->sector_size )
#define jffs2_can_mark_obsolete(c) ((c->mtd->type == MTD_NORFLASH && !(c->mtd->flags & MTD_ECC)) || c->mtd->type == MTD_RAM)
#define jffs2_can_mark_obsolete(c) \
((c->mtd->type == MTD_NORFLASH && !(c->mtd->flags & (MTD_ECC|MTD_PROGRAM_REGIONS))) || \
c->mtd->type == MTD_RAM)
#define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH)
#define jffs2_flash_write_oob(c, ofs, len, retlen, buf) ((c)->mtd->write_oob((c)->mtd, ofs, len, retlen, buf))
@ -124,6 +129,10 @@ void jffs2_nor_ecc_flash_cleanup(struct jffs2_sb_info *c);
int jffs2_dataflash_setup(struct jffs2_sb_info *c);
void jffs2_dataflash_cleanup(struct jffs2_sb_info *c);
#define jffs2_nor_wbuf_flash(c) (c->mtd->type == MTD_NORFLASH && (c->mtd->flags & MTD_PROGRAM_REGIONS))
int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c);
void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c);
#endif /* WRITEBUFFER */
/* erase.c */

22
fs/jffs2/wbuf.c
View File

@ -9,7 +9,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
* $Id: wbuf.c,v 1.96 2005/07/22 10:32:08 dedekind Exp $
* $Id: wbuf.c,v 1.97 2005/08/06 04:51:30 nico Exp $
*
*/
@ -1235,3 +1235,23 @@ int jffs2_nor_ecc_flash_setup(struct jffs2_sb_info *c) {
void jffs2_nor_ecc_flash_cleanup(struct jffs2_sb_info *c) {
kfree(c->wbuf);
}
int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c) {
/* Cleanmarker currently occupies a whole programming region */
c->cleanmarker_size = MTD_PROGREGION_SIZE(c->mtd);
/* Initialize write buffer */
init_rwsem(&c->wbuf_sem);
c->wbuf_pagesize = MTD_PROGREGION_SIZE(c->mtd);
c->wbuf_ofs = 0xFFFFFFFF;
c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL);
if (!c->wbuf)
return -ENOMEM;
return 0;
}
void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c) {
kfree(c->wbuf);
}