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2006-05-23[MTD] NAND whitespace and formatting cleanupThomas Gleixner2-111/+96
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-05-23[JFFS2] Simplify writebuffer handlingThomas Gleixner1-170/+102
The writev based write buffer implementation was far to complex as in most use cases the write buffer had to be handled anyway. Simplify the write buffer handling and use mtd->write instead. From extensive testing no performance impact has been noted. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-05-23[MTD] Add support for NDFC NAND controllerThomas Gleixner4-0/+390
NDFC NAND Flash controller is embedded in PPC EP44x SoCs. Add platform driver based support. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-05-23[MTD] Add platform support for NANDThomas Gleixner1-0/+47
Add the data structures necessary to provide platform device support for NAND Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-05-23[MTD] Simplify NAND lockingThomas Gleixner2-41/+47
Replace the chip lock by a the controller lock. For simple drivers a dummy controller structure is created by the scan code. This simplifies the locking algorithm in nand_get/release_chip(). Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-05-23[MTD] Improve software ECC calculationThomas Gleixner2-134/+96
Unrolling the loops produces denser and much faster code. Add a config switch which allows to select the byte order of the resulting ecc code. The current Linux implementation has a byte swap versus the SmartMedia specification Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2006-05-22[JFFS2] Initialise ref->next_in_ino when marking dirty space in wbuf flushDavid Woodhouse1-0/+1
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-22[JFFS2] Fix accounting error in jffs2_link_node_ref()David Woodhouse1-1/+1
When filing REF_OBSOLETE nodes, we'd add their size to the global 'dirty_size' count, but then to the eraseblock's 'used_size' count. That's not clever. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-22[JFFS2] Fix dummy jffs2_sum_scan_sumnode() macro for !SUMMARY case.David Woodhouse1-1/+1
I added an argument to the real function... Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-21Merge git://git.infradead.org/jffs2-devel-2.6David Woodhouse32-361/+3306
2006-05-21[MTD] Account for MODULE_SYMBOL_PREFIX when requesting NOR chip driverDavid Woodhouse1-3/+3
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-21[MTD] Use symbol_request() in old DiskOnChip probe code to find actual driverDavid Woodhouse1-42/+5
The previous code wouldn't work correctly on architectures which have a non-empty MODULE_SYMBOL_PREFIX, and this version is neater if slightly less optimal in the built-in case. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-21[MTD] Add Amstrad Delta NAND supportJonathan McDowell3-0/+245
The patch below adds support for the NAND device on the Amstrad Delta. This is a 32MiB 8bit Toshiba device, with the data bus connected to the OMAP MPUIO pins and ALE, CLE, NCE, NRE, NWE and NWP all connected to the Delta's latch2 16bit latch. Signed-Off-By: Jonathan McDowell <noodles@earth.li> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-21[JFFS2] Finally eliminate __totlen field from struct jffs2_raw_node_refDavid Woodhouse3-58/+121
Well, almost. We'll actually keep a 'TEST_TOTLEN' macro set for now, and keep doing some paranoia checks to make sure it's all working correctly. But if TEST_TOTLEN is unset, the size of struct jffs2_raw_node_ref drops from 16 bytes to 12 on 32-bit machines. That's a saving of about half a megabyte of memory on the OLPC prototype board, with 125K or so nodes in its 512MiB of flash. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-21[JFFS2] Locking issues in summary write code.David Woodhouse1-4/+17
We can't use jffs2_scan_dirty_space() because it doesn't do any locking; it's only for use at scan time -- hence the 'scan' in the name. Also, don't allocate refs while we have c->erase_completion_lock held. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-21[JFFS2] Remove stray kfree of summary info in XATTR code.David Woodhouse1-10/+11
We don't allocate this locally any more -- it's given to us and owner by our caller. Also improve the debug messages a little. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-21[JFFS2] File node reference for wasted space when flushing wbufDavid Woodhouse1-9/+20
Next step in ongoing campaign to file a struct jffs2_raw_node_ref for every piece of dirty space in the system, so that __totlen can be killed off.... Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-21[JFFS2] Add length argument to jffs2_add_physical_node_ref()David Woodhouse6-29/+15
If __totlen is going away, we need to pass the length in separately. Also stop callers from needlessly setting ref->next_phys to NULL, since that's done for them... and since that'll also be going away soon. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-21[JFFS2] Mark gaps in summary list as dirty spaceDavid Woodhouse1-29/+42
Make sure we allocate a ref for any dirty space which exists between nodes which we find in an eraseblock summary. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-21[JFFS2] Discard remaining free space when filing a dirty block in scan.David Woodhouse1-21/+26
The incoming ref_totlen() calculation is going to rely on the existence of nodes which cover all dirty space. We can't just tweak the accounting data any more; we have to call jffs2_scan_dirty_space() to do it. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-21[JFFS2] Introduce jffs2_scan_dirty_space() function.David Woodhouse5-46/+75
To eliminate the __totlen field from struct jffs2_raw_node_ref, we need to allocate nodes for dirty space instead of just tweaking the accounting data. Introduce jffs2_scan_dirty_space() in preparation for that. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-21[JFFS2] Fix summary handling of unknown but compatible nodes.David Woodhouse3-6/+22
For RWCOMPAT and ROCOMPAT nodes, we should still allow the mount to succeed. Just abandon the summary and fall through to the full scan. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-21[JFFS2] Fix memory leak in scan code; improve comments.David Woodhouse1-2/+7
If we had to allocate extra space for the summary node, we weren't correctly freeing it when jffs2_sum_scan_sumnode() returned nonzero -- which is both the success and the failure case. Only when it returned zero, which means fall through to the full scan, were we correctly freeing the buffer. Document the meaning of those return codes while we're at it. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-21[JFFS2] Correct handling of JFFS2_FEATURE_RWCOMPAT_COPY nodes.David Woodhouse4-23/+55
We should preserve these when we come to garbage collect them, not let them get erased. Use jffs2_garbage_collect_pristine() for this, and make sure the summary code copes -- just refrain from writing a summary for any block which contains a node we don't understand. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-20[JFFS2] Correct accounting of erroneous cleanmarkers and failed summaries.David Woodhouse1-3/+3
It should all be counted as dirty space, not wasted and _definitely_ not unchecked. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-20[JFFS2] Introduce jffs2_link_node_ref() function to reduce code duplicationDavid Woodhouse6-122/+68
The same sequence of code was repeated in many places, to add a new struct jffs2_raw_node_ref to an eraseblock and adjust the space accounting accordingly. Move it out-of-line. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-20Merge git://git.infradead.org/jffs2-xattr-2.6David Woodhouse29-15/+2822
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-20[JFFS2] Reduce calls to ref_totlen() in jffs2_mark_node_obsolete()David Woodhouse1-18/+21
We were calling ref_totlen() 18 times. Even before that becomes a real function rather than just a dereference, apparently some compilers still suck anyway. It'll _certainly_ suck after ref_totlen() becomes more complicated, so calculate it once and don't rely on CSE. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-20[JFFS2] Optimise reading of eraseblock summary nodesDavid Woodhouse3-49/+64
This improves the time to mount 512MiB of NAND flash on my OLPC prototype by about 4%. We used to read the last page of the eraseblock twice -- once to find the offset of the summary node, and again to actually _read_ the summary node. Now we read the last page only once, and read more only if we need to. We also don't allocate a new buffer just for the summary code -- we use the buffer which was already allocated for the scan. Better still, if the 'buffer' for the scan is actually just a pointer directly into NOR flash, we use that too, avoiding the memcpy() which we used to do. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-20[MTD] Avoid 64-bit division in mtdconcatAndrew Morton1-2/+6
WARNING: "__moddi3" [drivers/mtd/mtdconcat.ko] undefined! Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-20[MTD] Use __symbol_get() instead of symbol_get() in NOR chip probeDavid Woodhouse1-2/+2
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-20git-mtd: symbol_get() fixAndrew Morton1-2/+2
drivers/mtd/devices/docprobe.c: In function `DoC_Probe': drivers/mtd/devices/docprobe.c:338: warning: assignment from incompatible pointer type drivers/mtd/devices/docprobe.c:341: warning: assignment from incompatible pointer type Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-20[JFFS2] Remove forgotten summary codeFerenc Havasi1-11/+0
Remove forgotten lines from jffs2_scan_eraseblock() which were unnecessary and may cause problem in some environments. Thanks to Alexander Belyakov <alexander.belyakov@intel.com>. Signed-off-by: Ferenc Havasi <havasi@inf.u-szeged.hu> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-19[JFFS2] Support new device nodesDavid Woodhouse6-22/+43
Device node major/minor numbers are just stored in the payload of a single data node. Just extend that to 4 bytes and use new_encode_dev() for it. We only use the 4-byte format if we _need_ to, if !old_valid_dev(foo). This preserves backwards compatibility with older code as much as possible. If we do make devices with major or minor numbers above 255, and then mount the file system with the old code, it'll just read the first two bytes and get the numbers wrong. If it comes to garbage-collect it, it'll then write back those wrong numbers. But that's about the best we can expect. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-18Merge git://git.infradead.org/mtd-2.6KaiGai Kohei360-4469/+6627
2006-05-18[MTD] Fix printk format error in gen_probe.cDavid Woodhouse1-1/+1
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-18[MTD] Fix mtdconcat build. We didn't introduce mtd->writesize yet.David Woodhouse1-2/+2
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-17MTD: mtdconcat NAND/Sibley support (rev.2)Alexander Belyakov1-5/+164
There is a second revision of "mtdconcat NAND/Sibley" patch. I hope the patch will not get damaged as I'm posting it from gmail account, thanks to Jorn. The patch adds previously missing concat_writev(), concat_writev_ecc(), concat_block_isbad(), concat_block_markbad() functions to make concatenation layer compatible with Sibley and NAND chips. Patch has been cleared from whitespaces, fixed some lines of code as requested. Also I have added code for alignment check that should support Jorn's "writesize" patch. Signed-off-by: Alexander Belyakov <alexander.belyakov@intel.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-17LASAT depends on MTD_CFIMartin Michlmayr1-2/+2
The following difference was found between the mainline and linux-mips kernel. LASAT depends on MTD_CFI. Signed-off-by: Martin Michlmayr <tbm@cyrius.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-17Re-add module description for ms02-nv to KconfigMartin Michlmayr1-0/+5
In an unrelated MTD commit, a description about the ms02-nv module got removed from Kconfig. While I personally agree with this removal, the module maintainer (Maciej W. Rozycki) would like to see it added back. In the absense of any consistency regarding Kconfig descriptions his wish should be followed. Signed-off-by: Martin Michlmayr <tbm@cyrius.com> Acked-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-17[MTD] RFD FTL: Be noisier, and don't assume block without RFD magic are erasedSean Young1-23/+25
Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-17[MTD] generic: propagate oobavail to MTD partitionsVitaly Wool1-0/+1
'oobavail' parameter of mtd_info structure is now propagated to the MTD partitions Signed-off-by: Vitaly Wool <vwool@ru.mvista.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-17[PCMCIA MTD] Fix leak and crash on rebootSean Young1-0/+1
Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-17cfi_cmdset_0001: factorize code to wait for flash statusNicolas Pitre1-264/+157
This allows for much better abstraction and separation of the XIP and non-XIP cases with their own specific implementations. This fixes the case where a timeout was tripped on in the XIP case by the code that was meant for the non-XIP case only. This also makes for a nice code reduction. Signed-off-by: Nicolas Pitre <nico@cam.org> CC: "Alexey, Korolev" <alexey.korolev@intel.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-17cfi-cmdset-0001: always update the chip statusNicolas Pitre1-1/+3
... otherwise xip_enable() won't do the right thing. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-17CHIPS: Fix potential starvation in cfi_cmdset_0001Josh Boyer1-0/+5
The patch below fixes a potential starvation issue that can arise when there is contention on a chip during a period when a process is currently writing to it. The starvation is avoided by conditionally rescheduling when the chip is left in a state usable by other processes. Signed-off-by: Josh Boyer <jdub@us.ibm.com> Signed-off-by: Tom Gall <tom_gall@vnet.ibm.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-17[JFFS2] Repack some on-medium structures. ARM is weirder than I thought.David Woodhouse1-3/+3
We have to pack at least the jint16_t structure, because otherwise it'll be four bytes in size. Thankfully, we can do that and _not_ pack the actual node structures, and the compiler still doesn't emit stupid code. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-16NAND: Fix NAND ECC errors on AMD Au1550Sergei Shtylyov1-0/+139
On AMD Au1550 the static bus controller fails to keep -CE asserted during chip ready delay on read commands and the NAND chip being used requires this. So, the current driver allows nand_base.c to drive -CE manually during the entire sector read. When the PCMCIA driver is enabled however, occasionally the ECC errors occur on NAND reads. This happens because the PCMCIA driver polls sockets periodically and reads one of the board's control/status regs (BCSRs) which are on the same static bus as the NAND flash, and just use another chip select (and the NOR flash also resides on that bus), so as the NAND driver forces NAND chip select asserted and the -RE signal is shared, a contention occurs on the static bus when BCSR or NOR flash is read while we're reading from NAND. So, we either can't keep interrupts enabled during the whole NAND sector read (which is hardly acceptable), or have to implement some interlocking scheme between multiple drivers (which is painful, and makes me shudder :-). There's a third way which has proven to work: to force -CE asserted only while we're waiting for a NAND chip to become ready after a read command, disabling interrupts for a maximum of 25 microseconds (according to Toshiba TC58DVM92A1FT00 datasheet -- this chip is mentioned in the board schematics); for Samsung NAND chip which seems to be actually used this delay is even less, 12 us. Signed-off-by: Konstantin Baydarov <kbaidarov@ru.mvista.com> Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-16[MTD] Fix build warnings in RedBoot MTD partition parser.Ben Dooks1-9/+9
Fix build warnings from drivers/mtd/redboot.c due to use of `unsigned long` in `struct fis_image_desc` for fields being passed to swab32s() which expects __u32 * Change the entries to uint32_t to make them compatible with the swab32s() function Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-16NAND: AMD Au1550 driver reads write-only registerSergei Shtylyov1-4/+2
During the last cleanup of the AMD Au1550 NAND driver the old buglet was reintroduced: as the MEM_STNDCTL register is write-only and seem to always read as 0x31, read-modify-write to it done in au1xxx_nand_init() will have the side effect of enabling -RCS0/1 pin override (via bits 4/5 of this reg.), thus possibly causing a contention on the static bus when the NOR flash (using -RCS0) or board control status registers (using -RCS2) are read. Luckily, this goes away with a first NAND access, since au1550_hwcontrol() doesn't try to read this register before writing anymore. Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
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