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From: Boris Brezillon <boris.brezillon@collabora.com>
To: Lubomir Rintel <lkundrak@v3.sk>
Cc: vigneshr@ti.com, tudor.ambarus@microchip.com, richard@nod.at,
	linux-mtd@lists.infradead.org, miquel.raynal@bootlin.com,
	dwmw2@infradead.org
Subject: Re: [PATCH 13/17] mtd: rawnand: cafe: Add exec_op() support
Date: Sun, 3 May 2020 10:35:01 +0200	[thread overview]
Message-ID: <20200503103501.05a3d1e1@collabora.com> (raw)
In-Reply-To: <20200503101303.56e34f13@collabora.com>

On Sun, 3 May 2020 10:13:03 +0200
Boris Brezillon <boris.brezillon@collabora.com> wrote:

> > > > 
> > > > I'm happy to test another patch, or add more tracing (I'm not at all
> > > > familiar with NAND flashes or MTD for that matter, so I have little idea
> > > > what to look for).    
> > > 
> > > I pushed a new version with extended traces. That should tell us what
> > > those operations.    
> > 
> > Thank you.
> > 
> > I moved the last debugging printk() right after the call to
> > readl_poll_timeout(), otherwise we'd not be reaching it on errors.
> > 
> > A quick grep for ret=-110 in the log reveals two kinds of errors:
> > 
> >   [   15.046151] instr[0] = WAITRDY
> >   [   15.065290] instr[1] = DATA_IN(len=2112)
> >   [   16.085166] 2: ret=-110 status=80000000 wait=50000000  
> 
> Ok, that's interesting. While the WAITRDY shouldn't be there, DATA-only
> operations are allowed, and I'd expect at least a DMA_DONE event in
> that case, but we get nothing. Maybe we should use DMA only if there's
> at least one addr/cmd instruction. Or maybe the engine can't do
> DATA-only operations.

Or maybe length is actually 0 here, since my traces print
instr->ctx.data.len instead of nand_subop_get_data_len(subop, i).

> 
> > 
> > and
> >  
> >   [   47.034418] instr[0] = WAITRDY
> >   [   48.054781] 1: ret=-110 status=10000000 wait=c0000000  
> 
> Yep, I don't expect operation to start with a WAITRDY, and this
> situation is probably caused by this commit [1].

This commit is indeed introducing a regression (see the fix here [2]).
That should work better now.

> 
> > 
> > Full log here:
> > https://people.freedesktop.org/~lkundrak/nand-raw-trace2.txt
> > 
> > A log of your original patch, just in case the move of the logging
> > statement was incorrect:
> > https://people.freedesktop.org/~lkundrak/nand-raw-trace.txt
> > 
> > Lubo  
> 
> [1]https://github.com/bbrezillon/linux/commit/30248fb955ba5e33a1863c8654f286b98c35d233

[2]https://github.com/bbrezillon/linux/commit/ec0460c61343a539889ab6298dd043d00717f19b

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  reply	other threads:[~2020-05-03  8:35 UTC|newest]

Thread overview: 58+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-27  8:20 [PATCH 00/17] mtd: rawnand: cafe: Convert to exec_op() (and more) Boris Brezillon
2020-04-27  8:20 ` [PATCH 01/17] mtd: rawnand: cafe: Get rid of an inaccurate kernel doc header Boris Brezillon
2020-04-27 19:33   ` Miquel Raynal
2020-04-27  8:20 ` [PATCH 02/17] mtd: rawnand: cafe: Rename cafe_nand_write_page_lowlevel() Boris Brezillon
2020-04-27 19:33   ` Miquel Raynal
2020-04-27  8:20 ` [PATCH 03/17] mtd: rawnand: cafe: Use a correct ECC mode and pass the ECC alg Boris Brezillon
2020-04-27 19:34   ` Miquel Raynal
2020-04-27  8:20 ` [PATCH 04/17] mtd: rawnand: cafe: Include linux/io.h instead of asm/io.h Boris Brezillon
2020-04-27 19:35   ` Miquel Raynal
2020-04-27  8:20 ` [PATCH 05/17] mtd: rawnand: cafe: Demistify register fields Boris Brezillon
2020-04-27 19:42   ` Miquel Raynal
2020-04-28  6:06     ` Boris Brezillon
2020-04-27  8:20 ` [PATCH 06/17] mtd: rawnand: cafe: Factor out the controller initialization logic Boris Brezillon
2020-04-27 19:45   ` Miquel Raynal
2020-04-28  6:06     ` Boris Brezillon
2020-04-27  8:20 ` [PATCH 07/17] mtd: rawnand: cafe: Get rid of the debug module param Boris Brezillon
2020-04-27 19:46   ` Miquel Raynal
2020-04-27  8:20 ` [PATCH 08/17] mtd: rawnand: cafe: Use devm_kzalloc and devm_request_irq() Boris Brezillon
2020-04-27 19:47   ` Miquel Raynal
2020-04-27  8:20 ` [PATCH 09/17] mtd: rawnand: cafe: Get rid of a useless label Boris Brezillon
2020-04-27 19:47   ` Miquel Raynal
2020-04-27  8:20 ` [PATCH 10/17] mtd: rawnand: cafe: Explicitly inherit from nand_controller Boris Brezillon
2020-04-27 19:49   ` Miquel Raynal
2020-04-27  8:20 ` [PATCH 11/17] mtd: rawnand: cafe: Don't leave ECC enabled in the write path Boris Brezillon
2020-04-27 19:51   ` Miquel Raynal
2020-04-28  6:08     ` Boris Brezillon
2020-04-27  8:20 ` [PATCH 12/17] mtd: rawnand: cafe: Don't split things when reading/writing a page Boris Brezillon
2020-04-27 19:53   ` Miquel Raynal
2020-04-28  6:20     ` Boris Brezillon
2020-04-28  7:44       ` Miquel Raynal
2020-04-27  8:20 ` [PATCH 13/17] mtd: rawnand: cafe: Add exec_op() support Boris Brezillon
2020-04-27 19:59   ` Miquel Raynal
2020-04-28  6:24     ` Boris Brezillon
     [not found]   ` <20200502111410.330584-1-lkundrak@v3.sk>
2020-05-02 13:18     ` Boris Brezillon
     [not found]       ` <20200502191843.GA363829@furthur.local>
2020-05-02 22:34         ` Boris Brezillon
     [not found]           ` <20200503060610.GA386731@furthur.local>
2020-05-03  7:04             ` Boris Brezillon
2020-05-03  7:26               ` Boris Brezillon
     [not found]                 ` <20200503175537.GA404453@furthur.local>
2020-05-03 19:49                   ` Boris Brezillon
     [not found]               ` <20200503075208.GA387473@furthur.local>
2020-05-03  8:13                 ` Boris Brezillon
2020-05-03  8:35                   ` Boris Brezillon [this message]
2020-05-09 20:10         ` Boris Brezillon
2020-04-27  8:20 ` [PATCH 14/17] mtd: rawnand: cafe: Get rid of the legacy interface implementation Boris Brezillon
2020-04-27 20:00   ` Miquel Raynal
2020-04-27  8:20 ` [PATCH 15/17] mtd: rawnand: cafe: Adjust the cafe_{read, write}_buf() prototypes Boris Brezillon
2020-04-27 20:00   ` [PATCH 15/17] mtd: rawnand: cafe: Adjust the cafe_{read,write}_buf() prototypes Miquel Raynal
2020-04-28  6:24     ` Boris Brezillon
2020-04-27  8:20 ` [PATCH 16/17] mtd: rawnand: cafe: Handle non-32bit aligned reads/writes Boris Brezillon
2020-04-27 20:04   ` Miquel Raynal
2020-04-28  6:26     ` Boris Brezillon
2020-04-27  8:20 ` [PATCH 17/17] mtd: rawnand: cafe: s/uint{8,16,32}_t/u{8,16,32}/ Boris Brezillon
2020-04-27 20:05   ` Miquel Raynal
2020-04-27  8:20 ` [PATCH 17/17] mtd: rawnand: s/uint{8,16,32}_t/u{8,16,32}/ Boris Brezillon
2020-04-27  8:25   ` Boris Brezillon
2020-04-29  6:37 ` [PATCH 00/17] mtd: rawnand: cafe: Convert to exec_op() (and more) Thomas Petazzoni
2020-04-29  8:28   ` Boris Brezillon
     [not found]     ` <20200501055209.GA44510@furthur.local>
2020-05-01  6:21       ` Boris Brezillon
     [not found] ` <20200502112732.330971-1-lkundrak@v3.sk>
2020-05-02 13:15   ` Boris Brezillon
2020-05-08 10:32     ` Miquel Raynal

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