Hello Tony,
please add me to Cc, I am little bit under water, and it was just luck, that I found this EMail ;-)
Am 22.03.2016 um 13:39 schrieb Benzig, Tony:
Hello together,
I've been working on an AM335x based board with a NAND Flash attached on the GPMI Interface. I've been using U-boot v2015.01 with the latest ubi patches. Please don't ask why I'm not using the latest U-Boot Version, it's due to some company conventions.
That was my first thought ;-)
So my ubi and ubifs drivers are the same as the drivers on the current U-Boot master.
You should also look, that mtd and your nand driver is the same as in mainline.
I also added this patch from Heiko Schocher [U-Boot] [PATCH] mtd, ubi: set free_count to zero before walking through erase list: (http://lists.denx.de/pipermail/u-boot/2016-February/244472.html) Without using this patch, ubi is trying to write on pages which are not empty and this will directly lead to unrecoverable ecc errors.
Yes, but I think, this patch needs more investigation why this happens ..
Nevertheless, ubi is working so far but once I attach my ubi the second time (this will normally happen via fastmap), I can't mount my UBIFS anymore. Please see the log below.
Hmm.. I have such tests running for current mainline, they show no errors ...
It looks like there is something wrong with the fastmap anchors, because if I disable "CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT" and let Linux do the conversion, everything is fine until U-Boot is updating the anchors.
What Linux version do you use. I did the UBI/UBIFS sync with Linux 4.2, as UBI Fastmap is broken/buggy in Linux version before!
So, could you help me to analyse this strange behaviour or is it already known?
I am not aware of it ...
U-Boot# nand erase.part System device 0 offset 0xa00000, size 0x1f600000 Erasing at 0x1ffe0000 -- 100% complete. OK
U-Boot# usb start (Re)start USB... USB0: scanning bus 0 for devices... 1 USB Device(s) found scanning usb for storage devices... 1 Storage Device(s) found
U-Boot# fatload usb 0:1 0x82000000 update/rootfs.ubi 2097152 bytes read in 1300 ms (1.5 MiB/s)
U-Boot# nand write 0x82000000 0xA00000 0x200000 NAND write: device 0 offset 0xa00000, size 0x200000 2097152 bytes written: OK
U-Boot# ubi part System ubi0: default fastmap pool size: 200 ubi0: default fastmap WL pool size: 100 ubi0: attaching mtd1 ubi0: scanning is finished ubi0: attached mtd1 (name "mtd=2", size 502 MiB) ubi0: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes ubi0: min./max. I/O unit sizes: 2048/2048, sub-page size 2048 ubi0: VID header offset: 2048 (aligned 2048), data offset: 4096 ubi0: good PEBs: 4016, bad PEBs: 0, corrupted PEBs: 0 ubi0: user volume: 1, internal volumes: 1, max. volumes count: 128 ubi0: max/mean erase counter: 1/0, WL threshold: 4096, image sequence number: 2042447318 ubi0: available PEBs: 3896, total reserved PEBs: 120, PEBs reserved for bad PEB handling: 80
U-Boot# ubifsmount ubi:hwi UBIFS (ubi0:0): UBIFS: mounted UBI device 0, volume 0, name "hwi", R/O mode UBIFS (ubi0:0): LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes UBIFS (ubi0:0): FS size: 3047424 bytes (2 MiB, 24 LEBs), journal size 1142785 bytes (1 MiB, 8 LEBs) UBIFS (ubi0:0): reserved for root: 0 bytes (0 KiB) UBIFS (ubi0:0): media format: w4/r0 (latest is w4/r0), UUID 8db76d20, small LPT model
U-Boot# ubi part System Unmounting UBIFS volume hwi! ubi0 error: ubi_detach_mtd_dev: ubi0 reference count 1, destroy anyway ubi0: detaching mtd1 ubi0: mtd1 is detached ubi0: default fastmap pool size: 200 ubi0: default fastmap WL pool size: 100 ubi0: attaching mtd1 ubi0: attached by fastmap
Here a fastmap is found ... looks good.
ubi0: fastmap pool size: 200 ubi0: fastmap WL pool size: 100 ubi0: attached mtd1 (name "mtd=2", size 502 MiB) ubi0: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes ubi0: min./max. I/O unit sizes: 2048/2048, sub-page size 2048 ubi0: VID header offset: 2048 (aligned 2048), data offset: 4096 ubi0: good PEBs: 4016, bad PEBs: 0, corrupted PEBs: 0 ubi0: user volume: 1, internal volumes: 1, max. volumes count: 128 ubi0: max/mean erase counter: 2/0, WL threshold: 4096, image sequence number: 2042447318 ubi0: available PEBs: 3896, total reserved PEBs: 120, PEBs reserved for bad PEB handling: 80
Looks good ...
U-Boot# ubifsmount ubi:hwi UBIFS error (ubi0:0 pid 0): mount_ubifs: can't format empty UBI volume: read-only mount Error reading superblock on volume 'ubi:hwi' errno=-30! ubifsmount - mount UBIFS volume
Usage: ubifsmount <volume-name> - mount 'volume-name' volume
No real idea, whats happen here ... you have to debug into it, sorry.
bye, Heiko