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onenand: Switch to byte-based block access

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Sector-based blk_write() should die; switch to byte-based
blk_pwrite() instead.  Likewise for blk_read().

This particular device picks its size during onenand_initfn(),
and can be at most 0x80000000 bytes; therefore, shifting an
'int sec' request to get back to a byte offset should never
overflow 32 bits.  But adding assertions to document that point
should not hurt.

Signed-off-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Eric Blake 2016-05-06 10:26:37 -06:00 committed by Kevin Wolf
parent 9fc0d361cc
commit 441692ddd8
1 changed files with 27 additions and 14 deletions
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41
hw/block/onenand.c
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@ -224,7 +224,8 @@ static void onenand_reset(OneNANDState *s, int cold)
/* Lock the whole flash */
memset(s->blockwp, ONEN_LOCK_LOCKED, s->blocks);
if (s->blk_cur && blk_read(s->blk_cur, 0, s->boot[0], 8) < 0) {
if (s->blk_cur && blk_pread(s->blk_cur, 0, s->boot[0],
8 << BDRV_SECTOR_BITS) < 0) {
hw_error("%s: Loading the BootRAM failed.\n", __func__);
}
}
@ -240,8 +241,11 @@ static void onenand_system_reset(DeviceState *dev)
static inline int onenand_load_main(OneNANDState *s, int sec, int secn,
void *dest)
{
assert(UINT32_MAX >> BDRV_SECTOR_BITS > sec);
assert(UINT32_MAX >> BDRV_SECTOR_BITS > secn);
if (s->blk_cur) {
return blk_read(s->blk_cur, sec, dest, secn) < 0;
return blk_pread(s->blk_cur, sec << BDRV_SECTOR_BITS, dest,
secn << BDRV_SECTOR_BITS) < 0;
} else if (sec + secn > s->secs_cur) {
return 1;
}
@ -257,19 +261,22 @@ static inline int onenand_prog_main(OneNANDState *s, int sec, int secn,
int result = 0;
if (secn > 0) {
uint32_t size = (uint32_t)secn * 512;
uint32_t size = secn << BDRV_SECTOR_BITS;
uint32_t offset = sec << BDRV_SECTOR_BITS;
assert(UINT32_MAX >> BDRV_SECTOR_BITS > sec);
assert(UINT32_MAX >> BDRV_SECTOR_BITS > secn);
const uint8_t *sp = (const uint8_t *)src;
uint8_t *dp = 0;
if (s->blk_cur) {
dp = g_malloc(size);
if (!dp || blk_read(s->blk_cur, sec, dp, secn) < 0) {
if (!dp || blk_pread(s->blk_cur, offset, dp, size) < 0) {
result = 1;
}
} else {
if (sec + secn > s->secs_cur) {
result = 1;
} else {
dp = (uint8_t *)s->current + (sec << 9);
dp = (uint8_t *)s->current + offset;
}
}
if (!result) {
@ -278,7 +285,7 @@ static inline int onenand_prog_main(OneNANDState *s, int sec, int secn,
dp[i] &= sp[i];
}
if (s->blk_cur) {
result = blk_write(s->blk_cur, sec, dp, secn) < 0;
result = blk_pwrite(s->blk_cur, offset, dp, size, 0) < 0;
}
}
if (dp && s->blk_cur) {
@ -295,7 +302,8 @@ static inline int onenand_load_spare(OneNANDState *s, int sec, int secn,
uint8_t buf[512];
if (s->blk_cur) {
if (blk_read(s->blk_cur, s->secs_cur + (sec >> 5), buf, 1) < 0) {
uint32_t offset = (s->secs_cur + (sec >> 5)) << BDRV_SECTOR_BITS;
if (blk_pread(s->blk_cur, offset, buf, BDRV_SECTOR_SIZE) < 0) {
return 1;
}
memcpy(dest, buf + ((sec & 31) << 4), secn << 4);
@ -304,7 +312,7 @@ static inline int onenand_load_spare(OneNANDState *s, int sec, int secn,
} else {
memcpy(dest, s->current + (s->secs_cur << 9) + (sec << 4), secn << 4);
}
return 0;
}
@ -315,10 +323,12 @@ static inline int onenand_prog_spare(OneNANDState *s, int sec, int secn,
if (secn > 0) {
const uint8_t *sp = (const uint8_t *)src;
uint8_t *dp = 0, *dpp = 0;
uint32_t offset = (s->secs_cur + (sec >> 5)) << BDRV_SECTOR_BITS;
assert(UINT32_MAX >> BDRV_SECTOR_BITS > s->secs_cur + (sec >> 5));
if (s->blk_cur) {
dp = g_malloc(512);
if (!dp
|| blk_read(s->blk_cur, s->secs_cur + (sec >> 5), dp, 1) < 0) {
|| blk_pread(s->blk_cur, offset, dp, BDRV_SECTOR_SIZE) < 0) {
result = 1;
} else {
dpp = dp + ((sec & 31) << 4);
@ -336,8 +346,8 @@ static inline int onenand_prog_spare(OneNANDState *s, int sec, int secn,
dpp[i] &= sp[i];
}
if (s->blk_cur) {
result = blk_write(s->blk_cur, s->secs_cur + (sec >> 5),
dp, 1) < 0;
result = blk_pwrite(s->blk_cur, offset, dp,
BDRV_SECTOR_SIZE, 0) < 0;
}
}
g_free(dp);
@ -355,14 +365,17 @@ static inline int onenand_erase(OneNANDState *s, int sec, int num)
for (; num > 0; num--, sec++) {
if (s->blk_cur) {
int erasesec = s->secs_cur + (sec >> 5);
if (blk_write(s->blk_cur, sec, blankbuf, 1) < 0) {
if (blk_pwrite(s->blk_cur, sec << BDRV_SECTOR_BITS, blankbuf,
BDRV_SECTOR_SIZE, 0) < 0) {
goto fail;
}
if (blk_read(s->blk_cur, erasesec, tmpbuf, 1) < 0) {
if (blk_pread(s->blk_cur, erasesec << BDRV_SECTOR_BITS, tmpbuf,
BDRV_SECTOR_SIZE) < 0) {
goto fail;
}
memcpy(tmpbuf + ((sec & 31) << 4), blankbuf, 1 << 4);
if (blk_write(s->blk_cur, erasesec, tmpbuf, 1) < 0) {
if (blk_pwrite(s->blk_cur, erasesec << BDRV_SECTOR_BITS, tmpbuf,
BDRV_SECTOR_SIZE, 0) < 0) {
goto fail;
}
} else {