*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: wbuf.c,v 1.92 2005/04/05 12:51:54 dedekind Exp $
+ * $Id: wbuf.c,v 1.100 2005/09/30 13:59:13 dedekind Exp $
*
*/
static unsigned char *brokenbuf;
#endif
+#define PAGE_DIV(x) ( ((unsigned long)(x) / (unsigned long)(c->wbuf_pagesize)) * (unsigned long)(c->wbuf_pagesize) )
+#define PAGE_MOD(x) ( (unsigned long)(x) % (unsigned long)(c->wbuf_pagesize) )
+
/* max. erase failures before we mark a block bad */
#define MAX_ERASE_FAILURES 2
-/* two seconds timeout for timed wbuf-flushing */
-#define WBUF_FLUSH_TIMEOUT 2 * HZ
-
struct jffs2_inodirty {
uint32_t ino;
struct jffs2_inodirty *next;
{
D1(printk("About to refile bad block at %08x\n", jeb->offset));
- D2(jffs2_dump_block_lists(c));
/* File the existing block on the bad_used_list.... */
if (c->nextblock == jeb)
c->nextblock = NULL;
c->nr_erasing_blocks++;
jffs2_erase_pending_trigger(c);
}
- D2(jffs2_dump_block_lists(c));
/* Adjust its size counts accordingly */
c->wasted_size += jeb->free_size;
jeb->wasted_size += jeb->free_size;
jeb->free_size = 0;
- ACCT_SANITY_CHECK(c,jeb);
- D1(ACCT_PARANOIA_CHECK(jeb));
+ jffs2_dbg_dump_block_lists_nolock(c);
+ jffs2_dbg_acct_sanity_check_nolock(c,jeb);
+ jffs2_dbg_acct_paranoia_check_nolock(c, jeb);
}
/* Recover from failure to write wbuf. Recover the nodes up to the
/* Find the first node to be recovered, by skipping over every
node which ends before the wbuf starts, or which is obsolete. */
first_raw = &jeb->first_node;
- while (*first_raw &&
+ while (*first_raw &&
(ref_obsolete(*first_raw) ||
(ref_offset(*first_raw)+ref_totlen(c, jeb, *first_raw)) < c->wbuf_ofs)) {
D1(printk(KERN_DEBUG "Skipping node at 0x%08x(%d)-0x%08x which is either before 0x%08x or obsolete\n",
}
/* Do the read... */
- if (jffs2_cleanmarker_oob(c))
- ret = c->mtd->read_ecc(c->mtd, start, c->wbuf_ofs - start, &retlen, buf, NULL, c->oobinfo);
- else
- ret = c->mtd->read(c->mtd, start, c->wbuf_ofs - start, &retlen, buf);
-
+ ret = c->mtd->read(c->mtd, start, c->wbuf_ofs - start, &retlen, buf);
+
if (ret == -EBADMSG && retlen == c->wbuf_ofs - start) {
/* ECC recovered */
ret = 0;
/* ... and get an allocation of space from a shiny new block instead */
- ret = jffs2_reserve_space_gc(c, end-start, &ofs, &len);
+ ret = jffs2_reserve_space_gc(c, end-start, &len, JFFS2_SUMMARY_NOSUM_SIZE);
if (ret) {
printk(KERN_WARNING "Failed to allocate space for wbuf recovery. Data loss ensues.\n");
kfree(buf);
return;
}
+ ofs = write_ofs(c);
+
if (end-start >= c->wbuf_pagesize) {
/* Need to do another write immediately, but it's possible
that this is just because the wbuf itself is completely
- full, and there's nothing earlier read back from the
- flash. Hence 'buf' isn't necessarily what we're writing
+ full, and there's nothing earlier read back from the
+ flash. Hence 'buf' isn't necessarily what we're writing
from. */
unsigned char *rewrite_buf = buf?:c->wbuf;
uint32_t towrite = (end-start) - ((end-start)%c->wbuf_pagesize);
D1(printk(KERN_DEBUG "Write 0x%x bytes at 0x%08x in wbuf recover\n",
towrite, ofs));
-
+
#ifdef BREAKMEHEADER
static int breakme;
if (breakme++ == 20) {
printk(KERN_NOTICE "Faking write error at 0x%08x\n", ofs);
breakme = 0;
- c->mtd->write_ecc(c->mtd, ofs, towrite, &retlen,
- brokenbuf, NULL, c->oobinfo);
+ c->mtd->write(c->mtd, ofs, towrite, &retlen,
+ brokenbuf);
ret = -EIO;
} else
#endif
- if (jffs2_cleanmarker_oob(c))
- ret = c->mtd->write_ecc(c->mtd, ofs, towrite, &retlen,
- rewrite_buf, NULL, c->oobinfo);
- else
- ret = c->mtd->write(c->mtd, ofs, towrite, &retlen, rewrite_buf);
+ ret = c->mtd->write(c->mtd, ofs, towrite, &retlen,
+ rewrite_buf);
if (ret || retlen != towrite) {
/* Argh. We tried. Really we did. */
return;
raw2->flash_offset = ofs | REF_OBSOLETE;
- raw2->__totlen = ref_totlen(c, jeb, *first_raw);
- raw2->next_phys = NULL;
- raw2->next_in_ino = NULL;
- jffs2_add_physical_node_ref(c, raw2);
+ jffs2_add_physical_node_ref(c, raw2, ref_totlen(c, jeb, *first_raw), NULL);
}
return;
}
else
jeb->last_node = container_of(first_raw, struct jffs2_raw_node_ref, next_phys);
- ACCT_SANITY_CHECK(c,jeb);
- D1(ACCT_PARANOIA_CHECK(jeb));
+ jffs2_dbg_acct_sanity_check_nolock(c, jeb);
+ jffs2_dbg_acct_paranoia_check_nolock(c, jeb);
- ACCT_SANITY_CHECK(c,new_jeb);
- D1(ACCT_PARANOIA_CHECK(new_jeb));
+ jffs2_dbg_acct_sanity_check_nolock(c, new_jeb);
+ jffs2_dbg_acct_paranoia_check_nolock(c, new_jeb);
spin_unlock(&c->erase_completion_lock);
this happens, if we have a change to a new block,
or if fsync forces us to flush the writebuffer.
if we have a switch to next page, we will not have
- enough remaining space for this.
+ enough remaining space for this.
*/
- if (pad && !jffs2_dataflash(c)) {
+ if (pad ) {
c->wbuf_len = PAD(c->wbuf_len);
/* Pad with JFFS2_DIRTY_BITMASK initially. this helps out ECC'd NOR
with 8 byte page size */
memset(c->wbuf + c->wbuf_len, 0, c->wbuf_pagesize - c->wbuf_len);
-
+
if ( c->wbuf_len + sizeof(struct jffs2_unknown_node) < c->wbuf_pagesize) {
struct jffs2_unknown_node *padnode = (void *)(c->wbuf + c->wbuf_len);
padnode->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
}
/* else jffs2_flash_writev has actually filled in the rest of the
buffer for us, and will deal with the node refs etc. later. */
-
+
#ifdef BREAKME
static int breakme;
if (breakme++ == 20) {
printk(KERN_NOTICE "Faking write error at 0x%08x\n", c->wbuf_ofs);
breakme = 0;
- c->mtd->write_ecc(c->mtd, c->wbuf_ofs, c->wbuf_pagesize,
- &retlen, brokenbuf, NULL, c->oobinfo);
+ c->mtd->write(c->mtd, c->wbuf_ofs, c->wbuf_pagesize, &retlen,
+ brokenbuf);
ret = -EIO;
- } else
+ } else
#endif
-
- if (jffs2_cleanmarker_oob(c))
- ret = c->mtd->write_ecc(c->mtd, c->wbuf_ofs, c->wbuf_pagesize, &retlen, c->wbuf, NULL, c->oobinfo);
- else
+
ret = c->mtd->write(c->mtd, c->wbuf_ofs, c->wbuf_pagesize, &retlen, c->wbuf);
if (ret || retlen != c->wbuf_pagesize) {
return ret;
}
- spin_lock(&c->erase_completion_lock);
-
/* Adjust free size of the block if we padded. */
- if (pad && !jffs2_dataflash(c)) {
+ if (pad) {
struct jffs2_eraseblock *jeb;
+ struct jffs2_raw_node_ref *ref;
+ uint32_t waste = c->wbuf_pagesize - c->wbuf_len;
jeb = &c->blocks[c->wbuf_ofs / c->sector_size];
D1(printk(KERN_DEBUG "jffs2_flush_wbuf() adjusting free_size of %sblock at %08x\n",
(jeb==c->nextblock)?"next":"", jeb->offset));
- /* wbuf_pagesize - wbuf_len is the amount of space that's to be
+ /* wbuf_pagesize - wbuf_len is the amount of space that's to be
padded. If there is less free space in the block than that,
something screwed up */
- if (jeb->free_size < (c->wbuf_pagesize - c->wbuf_len)) {
+ if (jeb->free_size < waste) {
printk(KERN_CRIT "jffs2_flush_wbuf(): Accounting error. wbuf at 0x%08x has 0x%03x bytes, 0x%03x left.\n",
- c->wbuf_ofs, c->wbuf_len, c->wbuf_pagesize-c->wbuf_len);
+ c->wbuf_ofs, c->wbuf_len, waste);
printk(KERN_CRIT "jffs2_flush_wbuf(): But free_size for block at 0x%08x is only 0x%08x\n",
jeb->offset, jeb->free_size);
BUG();
}
- jeb->free_size -= (c->wbuf_pagesize - c->wbuf_len);
- c->free_size -= (c->wbuf_pagesize - c->wbuf_len);
- jeb->wasted_size += (c->wbuf_pagesize - c->wbuf_len);
- c->wasted_size += (c->wbuf_pagesize - c->wbuf_len);
- }
+ ref = jffs2_alloc_raw_node_ref();
+ if (!ref)
+ return -ENOMEM;
+ ref->flash_offset = c->wbuf_ofs + c->wbuf_len;
+ ref->flash_offset |= REF_OBSOLETE;
+
+ spin_lock(&c->erase_completion_lock);
+
+ jffs2_link_node_ref(c, jeb, ref, waste, NULL);
+ /* FIXME: that made it count as dirty. Convert to wasted */
+ jeb->dirty_size -= waste;
+ c->dirty_size -= waste;
+ jeb->wasted_size += waste;
+ c->wasted_size += waste;
+ } else
+ spin_lock(&c->erase_completion_lock);
/* Stick any now-obsoleted blocks on the erase_pending_list */
jffs2_refile_wbuf_blocks(c);
return 0;
}
-/* Trigger garbage collection to flush the write-buffer.
+/* Trigger garbage collection to flush the write-buffer.
If ino arg is zero, do it if _any_ real (i.e. not GC) writes are
- outstanding. If ino arg non-zero, do it only if a write for the
+ outstanding. If ino arg non-zero, do it only if a write for the
given inode is outstanding. */
int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino)
{
return ret;
}
-#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
-#define PAGE_DIV(x) ( ((unsigned long)(x) / (unsigned long)(c->wbuf_pagesize)) * (unsigned long)(c->wbuf_pagesize) )
-#define PAGE_MOD(x) ( (unsigned long)(x) % (unsigned long)(c->wbuf_pagesize) )
-#else
-#define PAGE_DIV(x) ( (x) & (~(c->wbuf_pagesize - 1)) )
-#define PAGE_MOD(x) ( (x) & (c->wbuf_pagesize - 1) )
-#endif
+static size_t jffs2_fill_wbuf(struct jffs2_sb_info *c, const uint8_t *buf,
+ size_t len)
+{
+ if (len && !c->wbuf_len && (len >= c->wbuf_pagesize))
+ return 0;
+
+ if (len > (c->wbuf_pagesize - c->wbuf_len))
+ len = c->wbuf_pagesize - c->wbuf_len;
+ memcpy(c->wbuf + c->wbuf_len, buf, len);
+ c->wbuf_len += (uint32_t) len;
+ return len;
+}
-int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs, unsigned long count, loff_t to, size_t *retlen, uint32_t ino)
+int jffs2_flash_writev(struct jffs2_sb_info *c, const struct kvec *invecs,
+ unsigned long count, loff_t to, size_t *retlen,
+ uint32_t ino)
{
- struct kvec outvecs[3];
- uint32_t totlen = 0;
- uint32_t split_ofs = 0;
- uint32_t old_totlen;
- int ret, splitvec = -1;
- int invec, outvec;
- size_t wbuf_retlen;
- unsigned char *wbuf_ptr;
- size_t donelen = 0;
+ struct jffs2_eraseblock *jeb;
+ size_t wbuf_retlen, donelen = 0;
uint32_t outvec_to = to;
+ int ret, invec;
- /* If not NAND flash, don't bother */
+ /* If not writebuffered flash, don't bother */
if (!jffs2_is_writebuffered(c))
return jffs2_flash_direct_writev(c, invecs, count, to, retlen);
-
+
down_write(&c->wbuf_sem);
/* If wbuf_ofs is not initialized, set it to target address */
if (c->wbuf_ofs == 0xFFFFFFFF) {
c->wbuf_ofs = PAGE_DIV(to);
- c->wbuf_len = PAGE_MOD(to);
+ c->wbuf_len = PAGE_MOD(to);
memset(c->wbuf,0xff,c->wbuf_pagesize);
}
- /* Fixup the wbuf if we are moving to a new eraseblock. The checks below
- fail for ECC'd NOR because cleanmarker == 16, so a block starts at
- xxx0010. */
- if (jffs2_nor_ecc(c)) {
- if (((c->wbuf_ofs % c->sector_size) == 0) && !c->wbuf_len) {
- c->wbuf_ofs = PAGE_DIV(to);
- c->wbuf_len = PAGE_MOD(to);
- memset(c->wbuf,0xff,c->wbuf_pagesize);
- }
- }
-
- /* Sanity checks on target address.
- It's permitted to write at PAD(c->wbuf_len+c->wbuf_ofs),
- and it's permitted to write at the beginning of a new
- erase block. Anything else, and you die.
- New block starts at xxx000c (0-b = block header)
- */
+ /*
+ * Sanity checks on target address. It's permitted to write
+ * at PAD(c->wbuf_len+c->wbuf_ofs), and it's permitted to
+ * write at the beginning of a new erase block. Anything else,
+ * and you die. New block starts at xxx000c (0-b = block
+ * header)
+ */
if (SECTOR_ADDR(to) != SECTOR_ADDR(c->wbuf_ofs)) {
/* It's a write to a new block */
if (c->wbuf_len) {
- D1(printk(KERN_DEBUG "jffs2_flash_writev() to 0x%lx causes flush of wbuf at 0x%08x\n", (unsigned long)to, c->wbuf_ofs));
+ D1(printk(KERN_DEBUG "jffs2_flash_writev() to 0x%lx "
+ "causes flush of wbuf at 0x%08x\n",
+ (unsigned long)to, c->wbuf_ofs));
ret = __jffs2_flush_wbuf(c, PAD_NOACCOUNT);
- if (ret) {
- /* the underlying layer has to check wbuf_len to do the cleanup */
- D1(printk(KERN_WARNING "jffs2_flush_wbuf() called from jffs2_flash_writev() failed %d\n", ret));
- *retlen = 0;
- goto exit;
- }
+ if (ret)
+ goto outerr;
}
/* set pointer to new block */
c->wbuf_ofs = PAGE_DIV(to);
- c->wbuf_len = PAGE_MOD(to);
- }
+ c->wbuf_len = PAGE_MOD(to);
+ }
if (to != PAD(c->wbuf_ofs + c->wbuf_len)) {
/* We're not writing immediately after the writebuffer. Bad. */
- printk(KERN_CRIT "jffs2_flash_writev(): Non-contiguous write to %08lx\n", (unsigned long)to);
+ printk(KERN_CRIT "jffs2_flash_writev(): Non-contiguous write "
+ "to %08lx\n", (unsigned long)to);
if (c->wbuf_len)
printk(KERN_CRIT "wbuf was previously %08x-%08x\n",
- c->wbuf_ofs, c->wbuf_ofs+c->wbuf_len);
- BUG();
- }
-
- /* Note outvecs[3] above. We know count is never greater than 2 */
- if (count > 2) {
- printk(KERN_CRIT "jffs2_flash_writev(): count is %ld\n", count);
+ c->wbuf_ofs, c->wbuf_ofs+c->wbuf_len);
BUG();
}
- invec = 0;
- outvec = 0;
-
- /* Fill writebuffer first, if already in use */
- if (c->wbuf_len) {
- uint32_t invec_ofs = 0;
-
- /* adjust alignment offset */
- if (c->wbuf_len != PAGE_MOD(to)) {
- c->wbuf_len = PAGE_MOD(to);
- /* take care of alignment to next page */
- if (!c->wbuf_len)
- c->wbuf_len = c->wbuf_pagesize;
- }
-
- while(c->wbuf_len < c->wbuf_pagesize) {
- uint32_t thislen;
-
- if (invec == count)
- goto alldone;
-
- thislen = c->wbuf_pagesize - c->wbuf_len;
-
- if (thislen >= invecs[invec].iov_len)
- thislen = invecs[invec].iov_len;
-
- invec_ofs = thislen;
-
- memcpy(c->wbuf + c->wbuf_len, invecs[invec].iov_base, thislen);
- c->wbuf_len += thislen;
- donelen += thislen;
- /* Get next invec, if actual did not fill the buffer */
- if (c->wbuf_len < c->wbuf_pagesize)
- invec++;
- }
-
- /* write buffer is full, flush buffer */
- ret = __jffs2_flush_wbuf(c, NOPAD);
- if (ret) {
- /* the underlying layer has to check wbuf_len to do the cleanup */
- D1(printk(KERN_WARNING "jffs2_flush_wbuf() called from jffs2_flash_writev() failed %d\n", ret));
- /* Retlen zero to make sure our caller doesn't mark the space dirty.
- We've already done everything that's necessary */
- *retlen = 0;
- goto exit;
- }
- outvec_to += donelen;
- c->wbuf_ofs = outvec_to;
-
- /* All invecs done ? */
- if (invec == count)
- goto alldone;
-
- /* Set up the first outvec, containing the remainder of the
- invec we partially used */
- if (invecs[invec].iov_len > invec_ofs) {
- outvecs[0].iov_base = invecs[invec].iov_base+invec_ofs;
- totlen = outvecs[0].iov_len = invecs[invec].iov_len-invec_ofs;
- if (totlen > c->wbuf_pagesize) {
- splitvec = outvec;
- split_ofs = outvecs[0].iov_len - PAGE_MOD(totlen);
- }
- outvec++;
- }
- invec++;
- }
-
- /* OK, now we've flushed the wbuf and the start of the bits
- we have been asked to write, now to write the rest.... */
-
- /* totlen holds the amount of data still to be written */
- old_totlen = totlen;
- for ( ; invec < count; invec++,outvec++ ) {
- outvecs[outvec].iov_base = invecs[invec].iov_base;
- totlen += outvecs[outvec].iov_len = invecs[invec].iov_len;
- if (PAGE_DIV(totlen) != PAGE_DIV(old_totlen)) {
- splitvec = outvec;
- split_ofs = outvecs[outvec].iov_len - PAGE_MOD(totlen);
- old_totlen = totlen;
+ /* adjust alignment offset */
+ if (c->wbuf_len != PAGE_MOD(to)) {
+ c->wbuf_len = PAGE_MOD(to);
+ /* take care of alignment to next page */
+ if (!c->wbuf_len) {
+ c->wbuf_len = c->wbuf_pagesize;
+ ret = __jffs2_flush_wbuf(c, NOPAD);
+ if (ret)
+ goto outerr;
}
}
- /* Now the outvecs array holds all the remaining data to write */
- /* Up to splitvec,split_ofs is to be written immediately. The rest
- goes into the (now-empty) wbuf */
+ for (invec = 0; invec < count; invec++) {
+ int vlen = invecs[invec].iov_len;
+ uint8_t *v = invecs[invec].iov_base;
- if (splitvec != -1) {
- uint32_t remainder;
+ wbuf_retlen = jffs2_fill_wbuf(c, v, vlen);
- remainder = outvecs[splitvec].iov_len - split_ofs;
- outvecs[splitvec].iov_len = split_ofs;
-
- /* We did cross a page boundary, so we write some now */
- if (jffs2_cleanmarker_oob(c))
- ret = c->mtd->writev_ecc(c->mtd, outvecs, splitvec+1, outvec_to, &wbuf_retlen, NULL, c->oobinfo);
- else
- ret = jffs2_flash_direct_writev(c, outvecs, splitvec+1, outvec_to, &wbuf_retlen);
-
- if (ret < 0 || wbuf_retlen != PAGE_DIV(totlen)) {
- /* At this point we have no problem,
- c->wbuf is empty. However refile nextblock to avoid
- writing again to same address.
- */
- struct jffs2_eraseblock *jeb;
-
- spin_lock(&c->erase_completion_lock);
-
- jeb = &c->blocks[outvec_to / c->sector_size];
- jffs2_block_refile(c, jeb, REFILE_ANYWAY);
-
- *retlen = 0;
- spin_unlock(&c->erase_completion_lock);
- goto exit;
+ if (c->wbuf_len == c->wbuf_pagesize) {
+ ret = __jffs2_flush_wbuf(c, NOPAD);
+ if (ret)
+ goto outerr;
}
-
+ vlen -= wbuf_retlen;
+ outvec_to += wbuf_retlen;
donelen += wbuf_retlen;
- c->wbuf_ofs = PAGE_DIV(outvec_to) + PAGE_DIV(totlen);
+ v += wbuf_retlen;
+
+ if (vlen >= c->wbuf_pagesize) {
+ ret = c->mtd->write(c->mtd, outvec_to, PAGE_DIV(vlen),
+ &wbuf_retlen, v);
+ if (ret < 0 || wbuf_retlen != PAGE_DIV(vlen))
+ goto outfile;
+
+ vlen -= wbuf_retlen;
+ outvec_to += wbuf_retlen;
+ c->wbuf_ofs = outvec_to;
+ donelen += wbuf_retlen;
+ v += wbuf_retlen;
+ }
- if (remainder) {
- outvecs[splitvec].iov_base += split_ofs;
- outvecs[splitvec].iov_len = remainder;
- } else {
- splitvec++;
+ wbuf_retlen = jffs2_fill_wbuf(c, v, vlen);
+ if (c->wbuf_len == c->wbuf_pagesize) {
+ ret = __jffs2_flush_wbuf(c, NOPAD);
+ if (ret)
+ goto outerr;
}
- } else {
- splitvec = 0;
+ outvec_to += wbuf_retlen;
+ donelen += wbuf_retlen;
}
- /* Now splitvec points to the start of the bits we have to copy
- into the wbuf */
- wbuf_ptr = c->wbuf;
+ /*
+ * If there's a remainder in the wbuf and it's a non-GC write,
+ * remember that the wbuf affects this ino
+ */
+ *retlen = donelen;
- for ( ; splitvec < outvec; splitvec++) {
- /* Don't copy the wbuf into itself */
- if (outvecs[splitvec].iov_base == c->wbuf)
- continue;
- memcpy(wbuf_ptr, outvecs[splitvec].iov_base, outvecs[splitvec].iov_len);
- wbuf_ptr += outvecs[splitvec].iov_len;
- donelen += outvecs[splitvec].iov_len;
+ if (jffs2_sum_active()) {
+ int res = jffs2_sum_add_kvec(c, invecs, count, (uint32_t) to);
+ if (res)
+ return res;
}
- c->wbuf_len = wbuf_ptr - c->wbuf;
-
- /* If there's a remainder in the wbuf and it's a non-GC write,
- remember that the wbuf affects this ino */
-alldone:
- *retlen = donelen;
if (c->wbuf_len && ino)
jffs2_wbuf_dirties_inode(c, ino);
ret = 0;
-
-exit:
+ up_write(&c->wbuf_sem);
+ return ret;
+
+outfile:
+ /*
+ * At this point we have no problem, c->wbuf is empty. However
+ * refile nextblock to avoid writing again to same address.
+ */
+
+ spin_lock(&c->erase_completion_lock);
+
+ jeb = &c->blocks[outvec_to / c->sector_size];
+ jffs2_block_refile(c, jeb, REFILE_ANYWAY);
+
+ spin_unlock(&c->erase_completion_lock);
+
+outerr:
+ *retlen = 0;
up_write(&c->wbuf_sem);
return ret;
}
struct kvec vecs[1];
if (!jffs2_is_writebuffered(c))
- return c->mtd->write(c->mtd, ofs, len, retlen, buf);
+ return jffs2_flash_direct_write(c, ofs, len, retlen, buf);
vecs[0].iov_base = (unsigned char *) buf;
vecs[0].iov_len = len;
/* Read flash */
down_read(&c->wbuf_sem);
- if (jffs2_cleanmarker_oob(c))
- ret = c->mtd->read_ecc(c->mtd, ofs, len, retlen, buf, NULL, c->oobinfo);
- else
- ret = c->mtd->read(c->mtd, ofs, len, retlen, buf);
+ ret = c->mtd->read(c->mtd, ofs, len, retlen, buf);
if ( (ret == -EBADMSG) && (*retlen == len) ) {
printk(KERN_WARNING "mtd->read(0x%zx bytes from 0x%llx) returned ECC error\n",
len, ofs);
- /*
- * We have the raw data without ECC correction in the buffer, maybe
+ /*
+ * We have the raw data without ECC correction in the buffer, maybe
* we are lucky and all data or parts are correct. We check the node.
* If data are corrupted node check will sort it out.
* We keep this block, it will fail on write or erase and the we
* mark it bad. Or should we do that now? But we should give him a chance.
- * Maybe we had a system crash or power loss before the ecc write or
+ * Maybe we had a system crash or power loss before the ecc write or
* a erase was completed.
* So we return success. :)
*/
ret = 0;
- }
+ }
/* if no writebuffer available or write buffer empty, return */
if (!c->wbuf_pagesize || !c->wbuf_len)
if (owbf > c->wbuf_len) /* is read beyond write buffer ? */
goto exit;
lwbf = c->wbuf_len - owbf; /* number of bytes to copy */
- if (lwbf > len)
+ if (lwbf > len)
lwbf = len;
- } else {
+ } else {
orbf = (c->wbuf_ofs - ofs); /* offset in read buffer */
if (orbf > len) /* is write beyond write buffer ? */
goto exit;
lwbf = len - orbf; /* number of bytes to copy */
- if (lwbf > c->wbuf_len)
+ if (lwbf > c->wbuf_len)
lwbf = c->wbuf_len;
- }
+ }
if (lwbf > 0)
memcpy(buf+orbf,c->wbuf+owbf,lwbf);
printk(KERN_NOTICE "jffs2_check_oob_empty(): allocation of temporary data buffer for oob check failed\n");
return -ENOMEM;
}
- /*
+ /*
* if mode = 0, we scan for a total empty oob area, else we have
* to take care of the cleanmarker in the first page of the block
*/
D1(printk(KERN_WARNING "jffs2_check_oob_empty(): Read OOB failed %d for block at %08x\n", ret, jeb->offset));
goto out;
}
-
+
if (retlen < len) {
D1(printk(KERN_WARNING "jffs2_check_oob_empty(): Read OOB return short read "
"(%zd bytes not %d) for block at %08x\n", retlen, len, jeb->offset));
ret = -EIO;
goto out;
}
-
+
/* Special check for first page */
for(i = 0; i < oob_size ; i++) {
/* Yeah, we know about the cleanmarker. */
- if (mode && i >= c->fsdata_pos &&
+ if (mode && i >= c->fsdata_pos &&
i < c->fsdata_pos + c->fsdata_len)
continue;
if (buf[i] != 0xFF) {
D2(printk(KERN_DEBUG "Found %02x at %x in OOB for %08x\n",
- buf[page+i], page+i, jeb->offset));
- ret = 1;
+ buf[i], i, jeb->offset));
+ ret = 1;
goto out;
}
}
- /* we know, we are aligned :) */
+ /* we know, we are aligned :) */
for (page = oob_size; page < len; page += sizeof(long)) {
unsigned long dat = *(unsigned long *)(&buf[page]);
if(dat != -1) {
- ret = 1;
+ ret = 1;
goto out;
}
}
out:
- kfree(buf);
-
+ kfree(buf);
+
return ret;
}
n.totlen = cpu_to_je32(8);
ret = jffs2_flash_write_oob(c, jeb->offset + c->fsdata_pos, c->fsdata_len, &retlen, (unsigned char *)&n);
-
+
if (ret) {
D1(printk(KERN_WARNING "jffs2_write_nand_cleanmarker(): Write failed for block at %08x: error %d\n", jeb->offset, ret));
return ret;
return 0;
}
-/*
+/*
* On NAND we try to mark this block bad. If the block was erased more
* than MAX_ERASE_FAILURES we mark it finaly bad.
* Don't care about failures. This block remains on the erase-pending
D1(printk(KERN_WARNING "jffs2_write_nand_badblock(): Marking bad block at %08x\n", bad_offset));
ret = c->mtd->block_markbad(c->mtd, bad_offset);
-
+
if (ret) {
D1(printk(KERN_WARNING "jffs2_write_nand_badblock(): Write failed for block at %08x: error %d\n", jeb->offset, ret));
return ret;
/* Do this only, if we have an oob buffer */
if (!c->mtd->oobsize)
return 0;
-
+
/* Cleanmarker is out-of-band, so inline size zero */
c->cleanmarker_size = 0;
c->fsdata_len = NAND_JFFS2_OOB16_FSDALEN;
c->badblock_pos = 15;
break;
-
+
default:
D1(printk(KERN_DEBUG "JFFS2 on NAND. No autoplacment info found\n"));
return -EINVAL;
/* Initialise write buffer */
init_rwsem(&c->wbuf_sem);
- c->wbuf_pagesize = c->mtd->oobblock;
+ c->wbuf_pagesize = c->mtd->writesize;
c->wbuf_ofs = 0xFFFFFFFF;
-
+
c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL);
if (!c->wbuf)
return -ENOMEM;
int jffs2_dataflash_setup(struct jffs2_sb_info *c) {
c->cleanmarker_size = 0; /* No cleanmarkers needed */
-
+
/* Initialize write buffer */
init_rwsem(&c->wbuf_sem);
- c->wbuf_pagesize = c->sector_size;
- c->wbuf_ofs = 0xFFFFFFFF;
+
+ c->wbuf_pagesize = c->mtd->erasesize;
+
+ /* Find a suitable c->sector_size
+ * - Not too much sectors
+ * - Sectors have to be at least 4 K + some bytes
+ * - All known dataflashes have erase sizes of 528 or 1056
+ * - we take at least 8 eraseblocks and want to have at least 8K size
+ * - The concatenation should be a power of 2
+ */
+
+ c->sector_size = 8 * c->mtd->erasesize;
+
+ while (c->sector_size < 8192) {
+ c->sector_size *= 2;
+ }
+
+ /* It may be necessary to adjust the flash size */
+ c->flash_size = c->mtd->size;
+
+ if ((c->flash_size % c->sector_size) != 0) {
+ c->flash_size = (c->flash_size / c->sector_size) * c->sector_size;
+ printk(KERN_WARNING "JFFS2 flash size adjusted to %dKiB\n", c->flash_size);
+ };
+
+ c->wbuf_ofs = 0xFFFFFFFF;
c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL);
if (!c->wbuf)
return -ENOMEM;
- printk(KERN_INFO "JFFS2 write-buffering enabled (%i)\n", c->wbuf_pagesize);
+ printk(KERN_INFO "JFFS2 write-buffering enabled buffer (%d) erasesize (%d)\n", c->wbuf_pagesize, c->sector_size);
return 0;
}
kfree(c->wbuf);
}
-int jffs2_nor_ecc_flash_setup(struct jffs2_sb_info *c) {
- /* Cleanmarker is actually larger on the flashes */
- c->cleanmarker_size = 16;
+int jffs2_nor_wbuf_flash_setup(struct jffs2_sb_info *c) {
+ /* Cleanmarker currently occupies whole programming regions,
+ * either one or 2 for 8Byte STMicro flashes. */
+ c->cleanmarker_size = max(16u, c->mtd->writesize);
/* Initialize write buffer */
init_rwsem(&c->wbuf_sem);
- c->wbuf_pagesize = c->mtd->eccsize;
+ c->wbuf_pagesize = c->mtd->writesize;
c->wbuf_ofs = 0xFFFFFFFF;
c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL);
return 0;
}
-void jffs2_nor_ecc_flash_cleanup(struct jffs2_sb_info *c) {
+void jffs2_nor_wbuf_flash_cleanup(struct jffs2_sb_info *c) {
kfree(c->wbuf);
}
projects / powerpc.git / blobdiff