From: Fabio Estevam <festevam@gmail.com>
To: Marc Kleine-Budde <mkl@pengutronix.de>, dev.kurt@vandijck-laurijssen.be
Cc: linux-can@vger.kernel.org, kernel@martin.sperl.org
Subject: Re: Testing two MCP2518FD's on i.MX8MM
Date: Sat, 12 Jun 2021 12:10:19 -0300 [thread overview]
Message-ID: <CAOMZO5D3suvPzaMq3Fx9LKDC9mzb-0w6i3EbQum-ozczdY-EPQ@mail.gmail.com> (raw)
In-Reply-To: <CAOMZO5CwS-cO3W148YHVYFwcL3QC8oFJfeQBb+WN=QgEPU7AsQ@mail.gmail.com>
[Sorry, resending. Sent HTML content by mistake]
On Sat, Jun 12, 2021 at 12:07 PM Fabio Estevam <festevam@gmail.com> wrote:
>
> Hi,
>
> I am trying to run CAN stress tests on an i.MX8MM-based board that has two mcp2518fd chips.
> I am using linux-next 20210607 and this is the ecspi dts:
> https://pastebin.com/raw/YVvuqAAc
>
> Then I launch the test script:
> ./cantest start
>
> This is the script content:
> https://pastebin.com/raw/hc8gKgUf
>
> The problem is that RX FIFO overflow happens:
>
> [ 128.559485] mcp251xfd spi0.0 can0: RX-0: FIFO overflow.
> [ 128.573478] mcp251xfd spi0.0 can0: RX-0: FIFO overflow.
> [ 128.584787] mcp251xfd spi0.0 can0: RX-0: FIFO overflow.
>
> and also cansequence errors:
> # 2020-02-09 01:41:15:368 sequence CNT: 2779938, RX: 8 expected: 34 missing: 230 skt overfl d: 0 a: 0 delta: 230 incident: 6 seq_wrap RX: 10860 sequ_wrap_expected: 10860 overall lost: 136
> 2020-02-09 01:41:15:368 sequence CNT: 9, RX: 34 expected: 9 missing: 25 skt overfl d: [ 899.794388] mcp251xfd spi0.0 can0: RX-0: FIFO overflow.
> 0 a: 0 delta: 25 incident: 7 seq_wrap RX: 10860 [ 899.804780] mcp251xfd spi0.0 can0: RX-0: FIFO overflow.
> sequ_wrap_expected: 10860 overall lost: 161
> 2020-02-09 01:41:15:370 sequence CNT: 40, RX: 9 expected: 40 missing: 225 skt overfl d: 0 a: 0 delta: 225 incident: 8 seq_wrap RX: 10860 sequ_wrap_expected: 10860 overall lost: 130
> 2020-02-09 01:41:15:392 sequence CNT: 137, RX: 105 expected: 137 missing: 224 skt overfl d: 0 a: 0 delta: 224 incident: 9 seq_wrap RX: 10860 sequ_wrap_expected: 10860 overall lost: 98
> 2020-02-09 01:41:15:396 sequence CNT: 137, RX: 145 expected: 137 missing: 8 skt overfl d: 0 a: 0 delta: 8 incident: 10 seq_wrap RX: 10860 sequ_wrap_expected: 10860 overall lost: 106
> 2020-02-09 01:41:15:403 sequence CNT: 160, ERRORFRAME 20000004 00 01 00 00 00 00 00 00
> 2020-02-09 01:41:15:414 sequence CNT: 192, ERRORFRAME 20000004 00 01 00 00 00 00 00 00
> 2020-02-09 01:41:15:414 sequence CNT: 192, RX: 210 expected: 192 missing: 18 skt overfl d: 0 a: 0 delta: 18 incident: 11 seq_wrap RX: 10860 sequ_wrap_expected: 10860 overall lost: 124
> 2020-02-09 01:41:15:416 sequence CNT: 220, RX: 222 expected: 220 missing: 2 skt overfl d: 0 a: 0 delta: 2 incident: 12 seq_wrap RX: 10860 sequ_wrap_expected: 10860 overall lost: 126
>
> I have applied this series to get SPI DMA to work on i.MX8MM:
> https://patches.linaro.org/cover/417924/
>
> I have also tried SPI PIO mode instead of DMA, but it does not help.
>
> Any ideas of what can be done to improve this?
>
> Thanks!
>
> Fabio Estevam
next parent reply other threads:[~2021-06-12 15:10 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAOMZO5CwS-cO3W148YHVYFwcL3QC8oFJfeQBb+WN=QgEPU7AsQ@mail.gmail.com>
2021-06-12 15:10 ` Fabio Estevam [this message]
2021-06-15 7:15 ` Testing two MCP2518FD's on i.MX8MM Marc Kleine-Budde
2021-06-21 12:24 ` Fabio Estevam
2021-06-21 12:37 ` Marc Kleine-Budde
2021-06-21 13:07 ` Fabio Estevam
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