fixme applied : check device size is a multiple of erasesize.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Crash detected on sam5d35 and its pmecc nand ecc controller.
The problem was a call to chip->ecc.hwctl from nand_write_subpage_hwecc
(nand_base.c) when we write a sub page.
chip->ecc.hwctl function is not set when we are using PMECC controller.
As a workaround, set NAND_NO_SUBPAGE_WRITE for PMECC controller in
order to disable sub page access in nand_write_page.
Signed-off-by: Herve Codina <Herve.CODINA@celad.com>
Acked-by: Josh Wu <josh.wu@atmel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
1) Why add the subpage read support?
The page size of the nand chip becomes larger and larger, the imx6 has to
supports the 16K page or even bigger page. But sometimes, the upper layer only
needs a small part of the page, such as 512 bytes or less.
For example, ubiattach may only read 64 bytes per page.
2) We only enable the subpage read support when it meets the conditions:
<1> the chip is imx6 (or later chips) which can supports large nand page.
<2> the size of ECC parity is byte aligned.
If the size of ECC parity is not byte aligned, the calling of NAND_CMD_RNDOUT
will fail.
3) What does this patch do?
This patch will fake a virtual small page for the subpage read, and call the
gpmi_ecc_read_page() to do the real work.
In order to fake a virtual small page, the patch changes the BCH registers and
the bch_geometry{}. After the subpage read finished, we will restore them back.
4) Performace:
4.1) Tested with Toshiba TC58NVG2S0F(4096 + 224) with the following command:
#ubiattach /dev/ubi_ctrl -m 4
The detail information of /dev/mtd4 shows below:
--------------------------------------------------------------
#mtdinfo /dev/mtd4
mtd4
Name: test
Type: nand
Eraseblock size: 262144 bytes, 256.0 KiB
Amount of eraseblocks: 1856 (486539264 bytes, 464.0 MiB)
Minimum input/output unit size: 4096 bytes
Sub-page size: 4096 bytes
OOB size: 224 bytes
Character device major/minor: 90:8
Bad blocks are allowed: true
Device is writable: true
--------------------------------------------------------------
4.2) Before this patch:
--------------------------------------------------------------
[ 94.530495] UBI: attaching mtd4 to ubi0
[ 98.928850] UBI: scanning is finished
[ 98.953594] UBI: attached mtd4 (name "test", size 464 MiB) to ubi0
[ 98.958562] UBI: PEB size: 262144 bytes (256 KiB), LEB size: 253952 bytes
[ 98.964076] UBI: min./max. I/O unit sizes: 4096/4096, sub-page size 4096
[ 98.969518] UBI: VID header offset: 4096 (aligned 4096), data offset: 8192
[ 98.975128] UBI: good PEBs: 1856, bad PEBs: 0, corrupted PEBs: 0
[ 98.979843] UBI: user volume: 1, internal volumes: 1, max. volumes count: 128
[ 98.985878] UBI: max/mean erase counter: 2/1, WL threshold: 4096, image sequence number: 2024916145
[ 98.993635] UBI: available PEBs: 0, total reserved PEBs: 1856, PEBs reserved for bad PEB handling: 40
[ 99.001807] UBI: background thread "ubi_bgt0d" started, PID 831
--------------------------------------------------------------
The attach time is about 98.9 - 94.5 = 4.4s
4.3) After this patch:
--------------------------------------------------------------
[ 286.464906] UBI: attaching mtd4 to ubi0
[ 289.186129] UBI: scanning is finished
[ 289.211416] UBI: attached mtd4 (name "test", size 464 MiB) to ubi0
[ 289.216360] UBI: PEB size: 262144 bytes (256 KiB), LEB size: 253952 bytes
[ 289.221858] UBI: min./max. I/O unit sizes: 4096/4096, sub-page size 4096
[ 289.227293] UBI: VID header offset: 4096 (aligned 4096), data offset: 8192
[ 289.232878] UBI: good PEBs: 1856, bad PEBs: 0, corrupted PEBs: 0
[ 289.237628] UBI: user volume: 0, internal volumes: 1, max. volumes count: 128
[ 289.243553] UBI: max/mean erase counter: 1/1, WL threshold: 4096, image sequence number: 2024916145
[ 289.251348] UBI: available PEBs: 1812, total reserved PEBs: 44, PEBs reserved for bad PEB handling: 40
[ 289.259417] UBI: background thread "ubi_bgt0d" started, PID 847
--------------------------------------------------------------
The attach time is about 289.18 - 286.46 = 2.7s
4.4) The conclusion:
We achieve (4.4 - 2.7) / 4.4 = 38.6% faster in the ubiattach.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
The nfc_geo->payload_size is equal to the mtd->writesize now,
use the nfc_geo->payload_size to replace the mtd->writesize.
This patch makes preparation for the gpmi's subpage read support.
In the subpage support, the nfc_geo->payload_size maybe smaller then
the mtd->writesize.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Add the "page" argument for the read_subpage hook. With this argument,
the implementation of this hook could prints out more accurate information
for debugging.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
The nand_get_flash_type parameter "busw" input value is not used by any
branch, and it is updated before use it in the function, so remove it,
define the "busw" as an internal variable.
Signed-off-by: Cai Zhiyong <caizhiyong@huawei.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
The actual ECC strength used to select the ECC scheme is 'ecc_strength'.
Use it in the error message.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This macro is not used so it's safe to remove it.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Home routers based on SoCs like BCM53010 (AKA BCM4708) use flashes
which can be nicely partitioned with bcm47xxpart. Header bcm47xx_nvram.h
is not available on bcm53xx, so don't include it.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Our code parsing "trx" header registers few partitions at once (in one
loop iteration). Add extra check in that place.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Up to now mtd-ram devices described in device trees were only accessible
if mtd-flash or mtd-rom were also configured at linux configuration
time, because MTD_PHYSMAP_OF was only available if (MTD_CFI ||
MTD_JEDECPROBE || MTD_ROM). Allow MTD_PHYSMAP_OF selection also
when only MTD_RAM is set.
Signed-off-by: Philippe De Muyter <phdm@macqel.be>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
There is no point in displaying the TS5500-specific driver entries if
TS5500 board support itself isn't enabled.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Instead of writing to "nand->reg + REG_FMICSR" we write to "REG_FMICSR"
which is NULL and not a valid register.
Fixes: 8bff82cbc3 ('mtd: add nand support for w90p910 (v2)')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Check the chip->jedec_version, and print out the right information
for JEDEC compliant NAND.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This patch adds the parsing code for the JEDEC compliant NAND.
Since we need the 0x40 as the column address, this patch also
makes the NAND_CMD_PARAM to use the 8-bit address only.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Check the return value from platform_get_irq() and propagate it in the case of
error.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
"rc" is an error code here, no need to check it a second time.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
PIO fall back is not an issue, so don't make this much noise.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
The site-specific OOM messages are unnecessary, because they
duplicate the MM subsystem generic OOM message.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
The site-specific OOM messages are unnecessary, because they
duplicate the MM subsystem generic OOM message.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
The site-specific OOM messages are unnecessary, because they
duplicate the MM subsystem generic OOM message.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
The site-specific OOM messages are unnecessary, because they
duplicate the MM subsystem generic OOM message.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
The site-specific OOM messages are unnecessary, because they
duplicate the MM subsystem generic OOM message.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
The site-specific OOM messages are unnecessary, because they
duplicate the MM subsystem generic OOM message.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
The site-specific OOM messages are unnecessary, because they
duplicate the MM subsystem generic OOM message.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
The site-specific OOM messages are unnecessary, because they
duplicate the MM subsystem generic OOM message.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
The ELM driver incorrectly reagard any non-zero return value from
pm_runtime_get_sync as an error, but it may return 1 if the device
was already active. Fix to only error when return value is negative.
Signed-off-by: Stefan Sørensen <stefan.sorensen@spectralink.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
read_buf is called in place of write_buf in the
nand_write_page_raw_syndrome function.
Signed-off-by: Boris BREZILLON <b.brezillon.dev@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
On archs like S390 or um this driver cannot build nor work.
Make it depend on HAS_IOMEM and HAS_DMA to bypass build failures.
drivers/built-in.o: In function `flctl_probe':
drivers/mtd/nand/sh_flctl.c:1097: undefined reference to `devm_ioremap_resource'
drivers/built-in.o: In function `flctl_dma_fifo0_transfer':
drivers/mtd/nand/sh_flctl.c:368: undefined reference to `dma_map_single'
drivers/mtd/nand/sh_flctl.c:407: undefined reference to `dma_unmap_single'
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Use a repeated read_byte() instead of read_buf(), since for x16 buswidth
devices, we need to avoid the upper I/O[16:9] bits. See the following
commit for reference:
commit 05f7835975
Author: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Thu Dec 5 22:22:04 2013 +0100
mtd: nand: don't use {read,write}_buf for 8-bit transfers
Now, I think that all barriers to probing ONFI on x16 devices are
removed, so remove the check from nand_flash_detect_onfi().
Tested on 8-bit ONFI NAND (Micron MT29F32G08CBADAWP).
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-By: Pekon Gupta <pekon@ti.com>
The NAND command helpers tend to automatically shift the column address
for x16 bus devices, since most commands expect a word address, not a
byte address. The Read ID command, however, expects an 8-bit address
(i.e., 0x00, 0x20, or 0x40 should not be translated to 0x00, 0x10, or
0x20).
This fixes the column address for a few drivers which imitate the
nand_base defaults. Note that I don't touch sh_flctl.c, since it already
handles this problem slightly differently (note its comment "READID is
always performed using an 8-bit bus").
I have not tested this patch, as I only have x8 parts up for testing at
this point. Hopefully that can change soon...
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-By: Pekon Gupta <pekon@ti.com>
The datasheet does not tell us how to parse out the ID data,
so handle it as a full ID nand.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
The patch converts the arrays to buffer pointers for nand_buffers{}.
The cafe_nand.c is the only NAND_OWN_BUFFERS user which allocates
nand_buffers{} itself.
This patch disables the DMA for nand_scan_ident, and restores the DMA
status after we finish the nand_scan_ident. This way, we can get page
size and OOB size and use them to allocate cafe->dmabuf.
Since the cafe_nand.c uses the NAND_ECC_HW_SYNDROME ECC mode, we do not
allocate the buffers for @ecccalc and @ecccode.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
None of these files are actually using any __init type directives
and hence don't need to include <linux/init.h>. Most are just a
left over from __devinit and __cpuinit removal, or simply due to
code getting copied from one driver to the next.
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: linux-mtd@lists.infradead.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
[Brian: dropped one incorrect hunk]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
mutex_destroy added on each device in block2mtd_exit and add_device failure
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Commit b2a2a84d35 (mtd: phram: dot not crash when
built-in and passing boot param) claims to be "based on Ville Herva's similar
patch to block2mtd" (c4e7fb3137), but it has
missed the crucial point of the original path: all these "if(n)def MODULE".
It has broken the possibility to create several phram instances when phram is
compiled as module. The possibility to add instances via /sys writes to
/sys/module/phram/parameters/phram was also broken with mentioned patch.
Proposed patch takes the idea of original block2mtd patch to its full extent.
Assumption "This function is always called before 'init_phram()'" was also
incorrect, so removed the comment. This patch effectively reverts also
b11ec57fc6 (mtd: phram: fix section mismatch for
phram_setup).
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nsn.com>
[Brian: remove static assigment = 0]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
We always put a NUL terminator one space past the end of the "vendor"
buffer. Walter Harms also pointed out that this should just use
kstrndup().
Fixes: 7d17c02a01 ('mtd: Add new SmartMedia/xD FTL')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Spansion s25fl256s1 and s25fl512s support Dual SPI transfers, hence set the
M25P80_DUAL_READ flag.
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Add support for Dual SPI read transfers, which is supported by some
Spansion SPI FLASHes.
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
touch freed memory.
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Merge tag 'upstream-3.14-rc5' of git://git.infradead.org/linux-ubifs
Pull ubifs fix from Artem Bityutskiy:
"Just a single fix for the UBI module unload path which makes sure we
do not touch freed memory"
* tag 'upstream-3.14-rc5' of git://git.infradead.org/linux-ubifs:
UBI: fix some use after free bugs
This patch excludes reserved-marker byte-position from oobfree->length
calculation. Thus all bytes from oobfree->offset till end of OOB are free.
CC: <stable@vger.kernel.org> # 3.13.x+
Signed-off-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
1) In current implementation, ecclayout->oobfree->offset is calculated with
respect to ecclayout->eccpos[0] which is incorrect because ECC bytes may not
be stored contiguously in OOB.
So, this patch calculates ecclayout->oobfree->offset with respect to last
ECC byte-position 'eccpos[ecclayout->eccbytes-1]'.
2) ECC layout of some ecc-schemes expects reserved-markers at specific eccpos[]
which should not be over-written by any file-system metadata.
So this patch aligns oobfree->offset taking into account of such markers.
CC: <stable@vger.kernel.org> # 3.13.x+
Tested-by: Enric Balletbo i Serra <eballetbo@gmail.com>
Tested-by: Stefan Roese <sr@denx.de>
Signed-off-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Move the kmem_cache_free() calls down a couple lines.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Fabian Frederick