From: Michael Nazzareno Trimarchi <michael@amarulasolutions.com>
To: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: s.hauer@pengutronix.de, Greg Ungerer <gerg@kernel.org>,
linux-mtd@lists.infradead.org
Subject: Re: GPMI iMX6ull timeout on DMA
Date: Mon, 29 Jul 2019 10:42:26 +0200 [thread overview]
Message-ID: <CAOf5uwk+iWmEk07b+RW3W1b1c0vjfhZVJwKpV_LZJofLNtBsug@mail.gmail.com> (raw)
In-Reply-To: <20190729103655.095297a2@xps13>
Hi all
On Mon, Jul 29, 2019 at 10:36 AM Miquel Raynal
<miquel.raynal@bootlin.com> wrote:
>
> Hi Greg,
>
> One question below.
>
> +Michael
> +Sascha
>
> Hello Michael, here is a similar issue to yours, I know you did not
> have enough time to share your solution but here we have someone else
> reproducing the issue, would you mind sharing a branch or a patch, even
> a WIP one, just to help debugging?
>
I have patches reverted as I mention in the email. The step to
reproduce is simple.
Just reboot every successful boot.
Michael
> Greg Ungerer <gerg@kernel.org> wrote on Mon, 29 Jul 2019 16:41:51 +1000:
>
> > Hi Miquel,
> >
> > I am experiencing a problem with NAND flash DMA timeouts on
> > iMX6ull based boards. The problem is very similar to that
> > described in:
> >
> > https://linux-mtd.infradead.narkive.com/JIUulfFB/gpmi-imx6ull-timeout-on-dma
> >
> > That didn't come to any specific resolution that I could see
> > in that thread.
> >
> > The boot trace on the console for me looks like this:
> >
> > nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xda
> > nand: Micron MT29F2G08ABAEAWP
> > nand: 256 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB size: 64
> > gpmi-nand 1806000.gpmi-nand: DMA timeout, last DMA
> > gpmi-nand 1806000.gpmi-nand: Show GPMI registers :
> > gpmi-nand 1806000.gpmi-nand: offset 0x000 : 0x20830002
> > gpmi-nand 1806000.gpmi-nand: offset 0x010 : 0x00000000
> > gpmi-nand 1806000.gpmi-nand: offset 0x020 : 0x00000000
> > gpmi-nand 1806000.gpmi-nand: offset 0x030 : 0x00000000
> > gpmi-nand 1806000.gpmi-nand: offset 0x040 : 0x00000000
> > gpmi-nand 1806000.gpmi-nand: offset 0x050 : 0x00000000
> > gpmi-nand 1806000.gpmi-nand: offset 0x060 : 0x01c6800c
> > gpmi-nand 1806000.gpmi-nand: offset 0x070 : 0x00010101
> > gpmi-nand 1806000.gpmi-nand: offset 0x080 : 0xe0000000
> > gpmi-nand 1806000.gpmi-nand: offset 0x090 : 0x23023336
> > gpmi-nand 1806000.gpmi-nand: offset 0x0a0 : 0x000001ee
> > gpmi-nand 1806000.gpmi-nand: offset 0x0b0 : 0xff000001
> > gpmi-nand 1806000.gpmi-nand: offset 0x0c0 : 0x00000001
> > gpmi-nand 1806000.gpmi-nand: offset 0x0d0 : 0x05020000
> > gpmi-nand 1806000.gpmi-nand: Show BCH registers :
> > gpmi-nand 1806000.gpmi-nand: offset 0x000 : 0x00000100
> > gpmi-nand 1806000.gpmi-nand: offset 0x010 : 0x00000010
> > gpmi-nand 1806000.gpmi-nand: offset 0x020 : 0x00000000
> > gpmi-nand 1806000.gpmi-nand: offset 0x030 : 0x00000000
> > gpmi-nand 1806000.gpmi-nand: offset 0x040 : 0x00000000
> > gpmi-nand 1806000.gpmi-nand: offset 0x050 : 0x00000000
> > gpmi-nand 1806000.gpmi-nand: offset 0x060 : 0x00000000
> > gpmi-nand 1806000.gpmi-nand: offset 0x070 : 0x00000000
> > gpmi-nand 1806000.gpmi-nand: offset 0x080 : 0x030a2080
> > gpmi-nand 1806000.gpmi-nand: offset 0x090 : 0x083e2080
> > gpmi-nand 1806000.gpmi-nand: offset 0x0a0 : 0x070a4080
> > gpmi-nand 1806000.gpmi-nand: offset 0x0b0 : 0x10da4080
> > gpmi-nand 1806000.gpmi-nand: offset 0x0c0 : 0x070a4080
> > gpmi-nand 1806000.gpmi-nand: offset 0x0d0 : 0x10da4080
> > gpmi-nand 1806000.gpmi-nand: offset 0x0e0 : 0x070a4080
> > gpmi-nand 1806000.gpmi-nand: offset 0x0f0 : 0x10da4080
> > gpmi-nand 1806000.gpmi-nand: offset 0x100 : 0x00000000
> > gpmi-nand 1806000.gpmi-nand: offset 0x110 : 0x00000000
> > gpmi-nand 1806000.gpmi-nand: offset 0x120 : 0x00000000
> > gpmi-nand 1806000.gpmi-nand: offset 0x130 : 0x00000000
> > gpmi-nand 1806000.gpmi-nand: offset 0x140 : 0x00000000
> > gpmi-nand 1806000.gpmi-nand: offset 0x150 : 0x20484342
> > gpmi-nand 1806000.gpmi-nand: offset 0x160 : 0x01000000
> > gpmi-nand 1806000.gpmi-nand: offset 0x170 : 0x00000000
> > gpmi-nand 1806000.gpmi-nand: BCH Geometry :
> > GF length : 13
> > ECC Strength : 8
> > Page Size in Bytes : 2110
> > Metadata Size in Bytes : 10
> > ECC Chunk0 Size in Bytes: 512
> > ECC Chunkn Size in Bytes: 512
> > ECC Chunk Count : 4
> > Payload Size in Bytes : 2048
> > Auxiliary Size in Bytes: 16
> > Auxiliary Status Offset: 12
> > Block Mark Byte Offset : 1999
> > Block Mark Bit Offset : 0
> > gpmi-nand 1806000.gpmi-nand: Chip: 0, Error -110
> > nand: timing mode 5 not acknowledged by the NAND chip
>
> What is the final timing mode used? Most of us tested in mode 5 I
> guess, maybe mode 4 is broken (don't know if this is the one used here,
> neither why mode 5 is refused). Can you please try by limiting the mode
> to 0, 1, 2... until, hopefully, we narrow down to the failing mode.
>
> > gpmi-nand 1806000.gpmi-nand: Chip: 0, Error -22
> > Scanning device for bad blocks
> > gpmi-nand 1806000.gpmi-nand: Chip: 0, Error -22
> > gpmi-nand 1806000.gpmi-nand: Chip: 0, Error -22
> > gpmi-nand 1806000.gpmi-nand: Chip: 0, Error -22
> > gpmi-nand 1806000.gpmi-nand: Chip: 0, Error -22
> > ....
> > gpmi-nand 1806000.gpmi-nand: Chip: 0, Error -22
> > gpmi-nand 1806000.gpmi-nand: Chip: 0, Error -22
> > gpmi-nand 1806000.gpmi-nand: Chip: 0, Error -22
> > 5 fixed-partitions partitions found on MTD device gpmi-nand
> > Creating 5 MTD partitions on "gpmi-nand":
> > 0x000000000000-0x000000500000 : "u-boot"
> > 0x000000500000-0x000000600000 : "u-boot-env"
> > 0x000000600000-0x000000800000 : "log"
> > 0x000000800000-0x000010000000 : "flash"
> > 0x000000000000-0x000010000000 : "all"
> > gpmi-nand 1806000.gpmi-nand: driver registered.
> >
> >
> > This is using a linux kernel v5.1.14. I have seen this happen on
> > a number of boards I have here - but it is only occasional. It
> > only happens once in a while on boot, maybe 1 in 40 or more times.
> > So it can take quite a while to reproduce (using a boot loop setup).
>
> That's strange... I don't get what would produce such unstable issue.
>
> >
> > As per the email thread I pointed to above I looked at reverting
> > those patches, but that was not at all easy given how much the gpmi
> > driver code had moved. So instead I modified the code with this:
> >
> > --- a/linux/drivers/mtd/nand/raw/gpmi-nand/gpmi-lib.c
> > +++ b/linux/drivers/mtd/nand/raw/gpmi-nand/gpmi-lib.c
> > @@ -481,6 +481,7 @@ static void gpmi_nfc_compute_timings(struct gpmi_nand_data *this,
> > void gpmi_nfc_apply_timings(struct gpmi_nand_data *this)
> > {
> > +#if 0
> > struct gpmi_nfc_hardware_timing *hw = &this->hw;
> > struct resources *r = &this->resources;
> > void __iomem *gpmi_regs = r->gpmi_regs;
> > @@ -505,6 +512,7 @@ void gpmi_nfc_apply_timings(struct gpmi_nand_data *this)
> > /* Wait for the DLL to settle. */
> > udelay(dll_wait_time_us);
> > +#endif
> > }
> > int gpmi_setup_data_interface(struct nand_chip *chip, int chipnr,
> >
> > So far after a couple of days of testing with this I no longer
> > see the DMA timeout.
> >
> > Any thoughts?
> >
> > Regards
> > Greg
> >
>
> Thanks,
> Miquèl
--
| Michael Nazzareno Trimarchi Amarula Solutions BV |
| COO - Founder Cruquiuskade 47 |
| +31(0)851119172 Amsterdam 1018 AM NL |
| [`as] http://www.amarulasolutions.com |
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next prev parent reply other threads:[~2019-07-29 8:42 UTC|newest]
Thread overview: 85+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-29 6:41 GPMI iMX6ull timeout on DMA Greg Ungerer
2019-07-29 8:36 ` Miquel Raynal
2019-07-29 8:42 ` Michael Nazzareno Trimarchi [this message]
2019-07-29 12:18 ` Greg Ungerer
2019-07-29 12:20 ` Michael Nazzareno Trimarchi
2019-07-29 12:33 ` Greg Ungerer
2019-07-29 12:47 ` Miquel Raynal
2019-07-29 12:49 ` Michael Nazzareno Trimarchi
2019-07-29 12:55 ` Miquel Raynal
2019-07-29 13:00 ` Michael Nazzareno Trimarchi
2019-07-29 13:22 ` Miquel Raynal
2019-07-29 20:00 ` Michael Nazzareno Trimarchi
2019-07-29 21:02 ` Miquel Raynal
2019-07-30 0:28 ` Greg Ungerer
2019-07-30 0:41 ` Greg Ungerer
2019-07-30 6:06 ` Greg Ungerer
2019-07-30 8:38 ` Miquel Raynal
2019-07-30 8:58 ` Boris Brezillon
2019-07-31 2:05 ` Greg Ungerer
2019-07-31 6:28 ` Boris Brezillon
2019-08-02 7:19 ` Greg Ungerer
2019-08-02 12:34 ` Greg Ungerer
2019-08-02 12:51 ` Boris Brezillon
2019-08-05 5:51 ` Greg Ungerer
2019-08-07 16:05 ` Miquel Raynal
2019-08-08 0:43 ` Greg Ungerer
2019-08-08 16:36 ` Boris Brezillon
2019-08-09 5:20 ` Greg Ungerer
2019-08-09 6:23 ` Boris Brezillon
2019-08-09 6:55 ` Greg Ungerer
2019-08-09 7:32 ` Boris Brezillon
2019-08-09 13:57 ` Greg Ungerer
2019-08-09 13:59 ` Boris Brezillon
2019-08-12 2:50 ` Greg Ungerer
2019-08-12 4:04 ` Greg Ungerer
2019-08-12 7:31 ` Boris Brezillon
2019-08-13 0:50 ` Greg Ungerer
2021-01-28 9:45 ` Michael Nazzareno Trimarchi
2021-01-28 10:26 ` Miquel Raynal
2021-01-28 10:35 ` Michael Nazzareno Trimarchi
2021-01-28 11:55 ` Michael Nazzareno Trimarchi
2021-01-29 12:43 ` Greg Ungerer
2021-01-30 9:41 ` Michael Nazzareno Trimarchi
2021-02-01 14:13 ` Miquel Raynal
2021-02-01 14:32 ` Michael Nazzareno Trimarchi
2021-02-01 15:08 ` Michael Nazzareno Trimarchi
2021-02-01 15:14 ` Miquel Raynal
2021-02-01 15:17 ` Michael Nazzareno Trimarchi
2021-10-15 20:05 ` Michael Trimarchi
2021-10-15 20:12 ` Michael Nazzareno Trimarchi
2021-10-18 7:19 ` Miquel Raynal
2021-10-18 7:33 ` Michael Nazzareno Trimarchi
2021-10-18 7:43 ` Miquel Raynal
2021-10-04 5:54 ` Christian Eggers
2021-10-04 6:27 ` Michael Nazzareno Trimarchi
2021-10-04 15:33 ` Miquel Raynal
2021-10-04 16:06 ` Han Xu
2021-10-05 6:02 ` Christian Eggers
2021-10-08 9:55 ` Christian Eggers
2021-10-08 12:08 ` Stefan Riedmüller
2021-10-08 12:27 ` Miquel Raynal
2021-10-08 13:11 ` Christian Eggers
2021-10-08 13:29 ` Miquel Raynal
2021-10-08 13:36 ` Miquel Raynal
2021-10-08 13:49 ` Christian Eggers
2021-10-08 16:07 ` Miquel Raynal
2021-10-09 5:53 ` Michael Nazzareno Trimarchi
2021-10-11 6:46 ` Miquel Raynal
2021-10-12 9:02 ` [RFC PATCH 1/2] mtd: rawnand: gpmi: Remove explicit default gpmi clock setting for i.MX6 Stefan Riedmueller
2021-10-12 9:02 ` [RFC PATCH 2/2] gpmi-nand: Add ERR007117 protection for nfc_apply_timings Stefan Riedmueller
2021-10-13 5:01 ` Han Xu
2021-10-22 8:45 ` Stefan Riedmüller
2021-10-22 14:35 ` han.xu
2021-10-25 9:39 ` Stefan Riedmüller
2021-10-28 9:28 ` Stefan Riedmüller
2021-11-01 4:01 ` han.xu
2021-10-13 6:10 ` Christian Eggers
2021-10-13 6:00 ` [RFC PATCH 1/2] mtd: rawnand: gpmi: Remove explicit default gpmi clock setting for i.MX6 Christian Eggers
2021-10-09 6:26 ` GPMI iMX6ull timeout on DMA Christian Eggers
2021-10-13 6:15 ` Christian Eggers
2021-10-08 13:13 ` Christian Eggers
2021-10-08 13:30 ` Miquel Raynal
2021-10-09 6:33 ` Christian Eggers
-- strict thread matches above, loose matches on Subject: below --
2018-10-02 13:22 GPMI IMX6ull timeout on dma Michael Nazzareno Trimarchi
2018-10-04 14:36 ` Michael Nazzareno Trimarchi
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