[PATCH][MTD] adding physical address to point()
Jared Hulbert
jaredeh at gmail.com
Thu Nov 15 19:35:56 EST 2007
Adding the ability to get a physical address from point() in addition
to virtual address. This physical address will be required for axfs
and cramfs with XIP.
Signed-off-by: Jared Hulbert <jaredeh at gmail.com <mailto:jaredeh at gmail.com>>
---
drivers/mtd/chips/cfi_cmdset_0001.c | 13 ++++++++-----
drivers/mtd/devices/mtdram.c | 11 +++++++----
drivers/mtd/devices/phram.c | 13 +++++++------
drivers/mtd/devices/pmc551.c | 27 +++++++++++++++++----------
drivers/mtd/devices/slram.c | 14 +++++++++-----
drivers/mtd/maps/uclinux.c | 6 ++++--
drivers/mtd/mtdpart.c | 8 ++++----
fs/jffs2/erase.c | 6 +++---
fs/jffs2/readinode.c | 8 ++++----
fs/jffs2/scan.c | 6 +++---
include/linux/mtd/mtd.h | 6 ++++--
include/linux/mtd/pmc551.h | 5 +++--
12 files changed, 73 insertions(+), 50 deletions(-)
diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c
b/drivers/mtd/chips/cfi_cmdset_0001.c
index da851c2..a4ef81a 100644
--- a/drivers/mtd/chips/cfi_cmdset_0001.c
+++ b/drivers/mtd/chips/cfi_cmdset_0001.c
@@ -82,8 +82,8 @@ static struct mtd_info *cfi_intelext_setup (struct
mtd_info *);
static int cfi_intelext_partition_fixup(struct mtd_info *, struct
cfi_private **);
static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t
len,
- size_t *retlen, u_char **mtdbuf);
-static void cfi_intelext_unpoint (struct mtd_info *mtd, u_char *addr,
loff_t from,
+ size_t *retlen, void **virt, resource_size_t *phys);
+static void cfi_intelext_unpoint (struct mtd_info *mtd, loff_t from,
size_t len);
static int chip_ready (struct map_info *map, struct flchip *chip,
unsigned long adr, int mode);
@@ -1216,7 +1216,8 @@ static int do_point_onechip (struct map_info *map,
struct flchip *chip, loff_t a
return ret;
}
-static int cfi_intelext_point (struct mtd_info *mtd, loff_t from,
size_t len, size_t *retlen, u_char **mtdbuf)
+static int cfi_intelext_point (struct mtd_info *mtd, loff_t from,
size_t len, size_t *retlen,
+ void **virt, resource_size_t *phys)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
@@ -1233,8 +1234,10 @@ static int cfi_intelext_point (struct mtd_info
*mtd, loff_t from, size_t len, si
chipnum = (from >> cfi->chipshift);
ofs = from - (chipnum << cfi->chipshift);
- *mtdbuf = (void *)map->virt + cfi->chips[chipnum].start + ofs;
+ *virt = map->virt + cfi->chips[chipnum].start + ofs;
*retlen = 0;
+ if (phys)
+ *phys = map->phys + cfi->chips[chipnum].start + ofs;
while (len) {
unsigned long thislen;
@@ -1267,7 +1270,7 @@ static int cfi_intelext_point (struct mtd_info
*mtd, loff_t from, size_t len, si
return 0;
}
-static void cfi_intelext_unpoint (struct mtd_info *mtd, u_char *addr,
loff_t from, size_t len)
+static void cfi_intelext_unpoint (struct mtd_info *mtd, loff_t from,
size_t len)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
diff --git a/drivers/mtd/devices/mtdram.c b/drivers/mtd/devices/mtdram.c
index e427c82..fe39a9d 100644
--- a/drivers/mtd/devices/mtdram.c
+++ b/drivers/mtd/devices/mtdram.c
@@ -47,18 +47,21 @@ static int ram_erase(struct mtd_info *mtd, struct
erase_info *instr)
}
static int ram_point(struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, u_char **mtdbuf)
+ size_t *retlen, void **virt, resource_size_t *phys)
{
if (from + len > mtd->size)
return -EINVAL;
- *mtdbuf = mtd->priv + from;
+ /* can we return a physical address with this driver? */
+ if (phys)
+ return -EINVAL;
+
+ *virt = mtd->priv + from;
*retlen = len;
return 0;
}
-static void ram_unpoint(struct mtd_info *mtd, u_char * addr, loff_t from,
- size_t len)
+static void ram_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
{
}
diff --git a/drivers/mtd/devices/phram.c b/drivers/mtd/devices/phram.c
index 56cc1ca..06d1052 100644
--- a/drivers/mtd/devices/phram.c
+++ b/drivers/mtd/devices/phram.c
@@ -57,20 +57,21 @@ static int phram_erase(struct mtd_info *mtd, struct
erase_info *instr)
}
static int phram_point(struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, u_char **mtdbuf)
+ size_t *retlen, void **virt, resource_size_t *phys)
{
- u_char *start = mtd->priv;
-
if (from + len > mtd->size)
return -EINVAL;
- *mtdbuf = start + from;
+ /* can we return a physical address with this driver? */
+ if (phys)
+ return -EINVAL;
+
+ *virt = mtd->priv + from;
*retlen = len;
return 0;
}
-static void phram_unpoint(struct mtd_info *mtd, u_char *addr, loff_t from,
- size_t len)
+static void phram_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
{
}
diff --git a/drivers/mtd/devices/pmc551.c b/drivers/mtd/devices/pmc551.c
index 7060a08..f82ba78 100644
--- a/drivers/mtd/devices/pmc551.c
+++ b/drivers/mtd/devices/pmc551.c
@@ -134,7 +134,8 @@ static int pmc551_erase(struct mtd_info *mtd, struct
erase_info *instr)
eoff_lo = end & (priv->asize - 1);
soff_lo = instr->addr & (priv->asize - 1);
- pmc551_point(mtd, instr->addr, instr->len, &retlen, &ptr);
+ pmc551_point(mtd, instr->addr, instr->len, &retlen,
+ (void **)&ptr, NULL);
if (soff_hi == eoff_hi || mtd->size == priv->asize) {
/* The whole thing fits within one access, so just one shot
@@ -154,7 +155,8 @@ static int pmc551_erase(struct mtd_info *mtd, struct
erase_info *instr)
}
soff_hi += priv->asize;
pmc551_point(mtd, (priv->base_map0 | soff_hi),
- priv->asize, &retlen, &ptr);
+ priv->asize, &retlen,
+ (void **)&ptr, NULL);
}
memset(ptr, 0xff, eoff_lo);
}
@@ -170,7 +172,7 @@ static int pmc551_erase(struct mtd_info *mtd, struct
erase_info *instr)
}
static int pmc551_point(struct mtd_info *mtd, loff_t from, size_t len,
- size_t * retlen, u_char ** mtdbuf)
+ size_t * retlen, void **virt, resource_size_t *phys)
{
struct mypriv *priv = mtd->priv;
u32 soff_hi;
@@ -188,6 +190,10 @@ static int pmc551_point(struct mtd_info *mtd,
loff_t from, size_t len,
return -EINVAL;
}
+ /* can we return a physical address with this driver? */
+ if (phys)
+ return -EINVAL;
+
soff_hi = from & ~(priv->asize - 1);
soff_lo = from & (priv->asize - 1);
@@ -198,13 +204,12 @@ static int pmc551_point(struct mtd_info *mtd,
loff_t from, size_t len,
priv->curr_map0 = soff_hi;
}
- *mtdbuf = priv->start + soff_lo;
+ *virt = priv->start + soff_lo;
*retlen = len;
return 0;
}
-static void pmc551_unpoint(struct mtd_info *mtd, u_char * addr, loff_t
from,
- size_t len)
+static void pmc551_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
{
#ifdef CONFIG_MTD_PMC551_DEBUG
printk(KERN_DEBUG "pmc551_unpoint()\n");
@@ -242,7 +247,7 @@ static int pmc551_read(struct mtd_info *mtd, loff_t
from, size_t len,
soff_lo = from & (priv->asize - 1);
eoff_lo = end & (priv->asize - 1);
- pmc551_point(mtd, from, len, retlen, &ptr);
+ pmc551_point(mtd, from, len, retlen, (void **)&ptr, NULL);
if (soff_hi == eoff_hi) {
/* The whole thing fits within one access, so just one shot
@@ -263,7 +268,8 @@ static int pmc551_read(struct mtd_info *mtd, loff_t
from, size_t len,
goto out;
}
soff_hi += priv->asize;
- pmc551_point(mtd, soff_hi, priv->asize, retlen, &ptr);
+ pmc551_point(mtd, soff_hi, priv->asize, retlen,
+ (void **)&ptr, NULL);
}
memcpy(copyto, ptr, eoff_lo);
copyto += eoff_lo;
@@ -308,7 +314,7 @@ static int pmc551_write(struct mtd_info *mtd, loff_t
to, size_t len,
soff_lo = to & (priv->asize - 1);
eoff_lo = end & (priv->asize - 1);
- pmc551_point(mtd, to, len, retlen, &ptr);
+ pmc551_point(mtd, to, len, retlen, (void **)&ptr, NULL);
if (soff_hi == eoff_hi) {
/* The whole thing fits within one access, so just one shot
@@ -329,7 +335,8 @@ static int pmc551_write(struct mtd_info *mtd, loff_t
to, size_t len,
goto out;
}
soff_hi += priv->asize;
- pmc551_point(mtd, soff_hi, priv->asize, retlen, &ptr);
+ pmc551_point(mtd, soff_hi, priv->asize, retlen,
+ (void **)&ptr, NULL);
}
memcpy(ptr, copyfrom, eoff_lo);
copyfrom += eoff_lo;
diff --git a/drivers/mtd/devices/slram.c b/drivers/mtd/devices/slram.c
index d293add..110884f 100644
--- a/drivers/mtd/devices/slram.c
+++ b/drivers/mtd/devices/slram.c
@@ -76,8 +76,8 @@ static char *map;
static slram_mtd_list_t *slram_mtdlist = NULL;
static int slram_erase(struct mtd_info *, struct erase_info *);
-static int slram_point(struct mtd_info *, loff_t, size_t, size_t *,
u_char **);
-static void slram_unpoint(struct mtd_info *, u_char *, loff_t, size_t);
+static int slram_point(struct mtd_info *, loff_t, size_t, size_t *,
void **, resource_size_t *);
+static void slram_unpoint(struct mtd_info *, loff_t, size_t);
static int slram_read(struct mtd_info *, loff_t, size_t, size_t *,
u_char *);
static int slram_write(struct mtd_info *, loff_t, size_t, size_t *,
const u_char *);
@@ -104,19 +104,23 @@ static int slram_erase(struct mtd_info *mtd,
struct erase_info *instr)
}
static int slram_point(struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, u_char **mtdbuf)
+ size_t *retlen, void **virt, resource_size_t *phys)
{
slram_priv_t *priv = mtd->priv;
+ /* can we return a physical address with this driver? */
+ if (phys)
+ return -EINVAL;
+
if (from + len > mtd->size)
return -EINVAL;
- *mtdbuf = priv->start + from;
+ *virt = priv->start + from;
*retlen = len;
return(0);
}
-static void slram_unpoint(struct mtd_info *mtd, u_char *addr, loff_t
from, size_t len)
+static void slram_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
{
}
diff --git a/drivers/mtd/maps/uclinux.c b/drivers/mtd/maps/uclinux.c
index 14ffb1a..c42f4b8 100644
--- a/drivers/mtd/maps/uclinux.c
+++ b/drivers/mtd/maps/uclinux.c
@@ -40,10 +40,12 @@ struct mtd_partition uclinux_romfs[] = {
/****************************************************************************/
int uclinux_point(struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, u_char **mtdbuf)
+ size_t *retlen, void **virt, resource_size_t *phys)
{
struct map_info *map = mtd->priv;
- *mtdbuf = (u_char *) (map->virt + ((int) from));
+ *virt = map->virt + from;
+ if (phys)
+ *phys = map->phys + from;
*retlen = len;
return(0);
}
diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index 6174a97..5f62018 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -68,7 +68,7 @@ static int part_read (struct mtd_info *mtd, loff_t
from, size_t len,
}
static int part_point (struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, u_char **buf)
+ size_t *retlen, void **virt, resource_size_t *phys)
{
struct mtd_part *part = PART(mtd);
if (from >= mtd->size)
@@ -76,14 +76,14 @@ static int part_point (struct mtd_info *mtd, loff_t
from, size_t len,
else if (from + len > mtd->size)
len = mtd->size - from;
return part->master->point (part->master, from + part->offset,
- len, retlen, buf);
+ len, retlen, virt, phys);
}
-static void part_unpoint (struct mtd_info *mtd, u_char *addr, loff_t
from, size_t len)
+static void part_unpoint (struct mtd_info *mtd, loff_t from, size_t len)
{
struct mtd_part *part = PART(mtd);
- part->master->unpoint (part->master, addr, from + part->offset, len);
+ part->master->unpoint (part->master, from + part->offset, len);
}
static int part_read_oob(struct mtd_info *mtd, loff_t from,
diff --git a/fs/jffs2/erase.c b/fs/jffs2/erase.c
index a1db918..f6c6fe2 100644
--- a/fs/jffs2/erase.c
+++ b/fs/jffs2/erase.c
@@ -332,7 +332,7 @@ static int jffs2_block_check_erase(struct
jffs2_sb_info *c, struct jffs2_erasebl
if (c->mtd->point) {
unsigned long *wordebuf;
- ret = c->mtd->point(c->mtd, jeb->offset, c->sector_size, &retlen,
(unsigned char **)&ebuf);
+ ret = c->mtd->point(c->mtd, jeb->offset, c->sector_size, &retlen,
&ebuf, NULL);
if (ret) {
D1(printk(KERN_DEBUG "MTD point failed %d\n", ret));
goto do_flash_read;
@@ -340,7 +340,7 @@ static int jffs2_block_check_erase(struct
jffs2_sb_info *c, struct jffs2_erasebl
if (retlen < c->sector_size) {
/* Don't muck about if it won't let us point to the whole erase sector */
D1(printk(KERN_DEBUG "MTD point returned len too short: 0x%zx\n", retlen));
- c->mtd->unpoint(c->mtd, ebuf, jeb->offset, retlen);
+ c->mtd->unpoint(c->mtd, jeb->offset, retlen);
goto do_flash_read;
}
wordebuf = ebuf-sizeof(*wordebuf);
@@ -349,7 +349,7 @@ static int jffs2_block_check_erase(struct
jffs2_sb_info *c, struct jffs2_erasebl
if (*++wordebuf != ~0)
break;
} while(--retlen);
- c->mtd->unpoint(c->mtd, ebuf, jeb->offset, c->sector_size);
+ c->mtd->unpoint(c->mtd, jeb->offset, c->sector_size);
if (retlen)
printk(KERN_WARNING "Newly-erased block contained word 0x%lx at offset
0x%08tx\n",
*wordebuf, jeb->offset + c->sector_size-retlen*sizeof(*wordebuf));
diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c
index 2eae5d2..d782ffa 100644
--- a/fs/jffs2/readinode.c
+++ b/fs/jffs2/readinode.c
@@ -62,10 +62,10 @@ static int check_node_data(struct jffs2_sb_info *c,
struct jffs2_tmp_dnode_info
/* TODO: instead, incapsulate point() stuff to jffs2_flash_read(),
* adding and jffs2_flash_read_end() interface. */
if (c->mtd->point) {
- err = c->mtd->point(c->mtd, ofs, len, &retlen, &buffer);
+ err = c->mtd->point(c->mtd, ofs, len, &retlen, (void **)&buffer, NULL);
if (!err && retlen < tn->csize) {
JFFS2_WARNING("MTD point returned len too short: %zu instead of %u.\n",
retlen, tn->csize);
- c->mtd->unpoint(c->mtd, buffer, ofs, retlen);
+ c->mtd->unpoint(c->mtd, ofs, retlen);
} else if (err)
JFFS2_WARNING("MTD point failed: error code %d.\n", err);
else
@@ -99,7 +99,7 @@ static int check_node_data(struct jffs2_sb_info *c,
struct jffs2_tmp_dnode_info
kfree(buffer);
#ifndef __ECOS
else
- c->mtd->unpoint(c->mtd, buffer, ofs, len);
+ c->mtd->unpoint(c->mtd, ofs, len);
#endif
if (crc != tn->data_crc) {
@@ -135,7 +135,7 @@ free_out:
kfree(buffer);
#ifndef __ECOS
else
- c->mtd->unpoint(c->mtd, buffer, ofs, len);
+ c->mtd->unpoint(c->mtd, ofs, len);
#endif
return err;
}
diff --git a/fs/jffs2/scan.c b/fs/jffs2/scan.c
index 272872d..0b7edc8 100644
--- a/fs/jffs2/scan.c
+++ b/fs/jffs2/scan.c
@@ -97,11 +97,11 @@ int jffs2_scan_medium(struct jffs2_sb_info *c)
size_t pointlen;
if (c->mtd->point) {
- ret = c->mtd->point (c->mtd, 0, c->mtd->size, &pointlen, &flashbuf);
+ ret = c->mtd->point(c->mtd, 0, c->mtd->size, &pointlen, (void
**)&flashbuf, NULL);
if (!ret && pointlen < c->mtd->size) {
/* Don't muck about if it won't let us point to the whole flash */
D1(printk(KERN_DEBUG "MTD point returned len too short: 0x%zx\n",
pointlen));
- c->mtd->unpoint(c->mtd, flashbuf, 0, pointlen);
+ c->mtd->unpoint(c->mtd, 0, pointlen);
flashbuf = NULL;
}
if (ret)
@@ -267,7 +267,7 @@ int jffs2_scan_medium(struct jffs2_sb_info *c)
kfree(flashbuf);
#ifndef __ECOS
else
- c->mtd->unpoint(c->mtd, flashbuf, 0, c->mtd->size);
+ c->mtd->unpoint(c->mtd, 0, c->mtd->size);
#endif
if (s)
kfree(s);
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 783fc98..041ce23 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -143,10 +143,12 @@ struct mtd_info {
int (*erase) (struct mtd_info *mtd, struct erase_info *instr);
/* This stuff for eXecute-In-Place */
- int (*point) (struct mtd_info *mtd, loff_t from, size_t len, size_t
*retlen, u_char **mtdbuf);
+ /* phys is optional and may be set to NULL */
+ int (*point) (struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, void **virt, resource_size_t *phys);
/* We probably shouldn't allow XIP if the unpoint isn't a NULL */
- void (*unpoint) (struct mtd_info *mtd, u_char * addr, loff_t from,
size_t len);
+ void (*unpoint) (struct mtd_info *mtd, loff_t from, size_t len);
int (*read) (struct mtd_info *mtd, loff_t from, size_t len, size_t
*retlen, u_char *buf);
diff --git a/include/linux/mtd/pmc551.h b/include/linux/mtd/pmc551.h
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