RE: Possible bug on wilc1000 [Klartext]

[Christoph Niedermaier <cniedermaier@dh-electronics.com>]

From: Ajay.Kathat@microchip.com [mailto:Ajay.Kathat@microchip.com]
Sent: Wednesday, February 9, 2022 3:37 PM
> On 08/02/22 21:56, Christoph Niedermaier wrote:
>>
>> Hello,
>>
>> I tested the wireless chip wilc1000 with the 5.16.5 Kernel and the firmware v15.4.1
>> (https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/atmel/wilc1000_wifi_firmware-1.bin)
>> on an i.MX6 QUAD with iperf3:
>>
>> # iperf3 -c IP_ADDR -P 16 -t 0
>>
>> After a while the test gets stuck and I got the following kernel messages:
>> mmc0: Timeout waiting for hardware interrupt.
>> mmc0: sdhci: ============ SDHCI REGISTER DUMP ===========
>> mmc0: sdhci: Sys addr:  0x138f0200 | Version:  0x00000002
>> mmc0: sdhci: Blk size:  0x00000158 | Blk cnt:  0x00000001
>> mmc0: sdhci: Argument:  0x14000158 | Trn mode: 0x00000013
>> mmc0: sdhci: Present:   0x01d88a0a | Host ctl: 0x00000013
>> mmc0: sdhci: Power:     0x00000002 | Blk gap:  0x00000080
>> mmc0: sdhci: Wake-up:   0x00000008 | Clock:    0x0000009f
>> mmc0: sdhci: Timeout:   0x0000008f | Int stat: 0x00000000
>> mmc0: sdhci: Int enab:  0x107f100b | Sig enab: 0x107f100b
>> mmc0: sdhci: ACmd stat: 0x00000000 | Slot int: 0x00000003
>> mmc0: sdhci: Caps:      0x07eb0000 | Caps_1:   0x0000a000
>> mmc0: sdhci: Cmd:       0x0000353a | Max curr: 0x00ffffff
>> mmc0: sdhci: Resp[0]:   0x00001000 | Resp[1]:  0x00000000
>> mmc0: sdhci: Resp[2]:   0x00000000 | Resp[3]:  0x00000000
>> mmc0: sdhci: Host ctl2: 0x00000000
>> mmc0: sdhci: ADMA Err:  0x00000007 | ADMA Ptr: 0x4c041200
>> mmc0: sdhci-esdhc-imx: ========= ESDHC IMX DEBUG STATUS DUMP =========
>> mmc0: sdhci-esdhc-imx: cmd debug status:  0x2100
>> mmc0: sdhci-esdhc-imx: data debug status:  0x2200
>> mmc0: sdhci-esdhc-imx: trans debug status:  0x2300
>> mmc0: sdhci-esdhc-imx: dma debug status:  0x2402
>> mmc0: sdhci-esdhc-imx: adma debug status:  0x25b4
>> mmc0: sdhci-esdhc-imx: fifo debug status:  0x2610
>> mmc0: sdhci-esdhc-imx: async fifo debug status:  0x2751
>> mmc0: sdhci: ============================================
>> wilc1000_sdio mmc0:0001:1: wilc_sdio_cmd53..failed, err(-110)
>> wilc1000_sdio mmc0:0001:1: Failed cmd53 [0], bytes read...
>>
>> I tried to reduce the clock speed to 20MHz in the devicetree with
>> max-frequency = <20000000>;
>> but the problem then also occurs.
>>
>> Is this a possible bug?
>>
>>
> 

Hi Ajay,
Thanks for the answer.

> The bus error seems to be specific to the host during the SDIO transfer.
> How long does it take to reproduce it? Does the issue also happen
> without "-P 16" iPerf3 option?

It takes about 10s (something a bit longer) till I got this kernel error
messages and it doesn't matter if I use it with "-P 16" or without.

> It might be worth trying with power-save mode disabled. The PS mode can
> be disabled either by setting WID_POWER_MANAGEMENT WID to
> 0(WILC_FW_NO_POWERSAVE) in "wilc_set_power_mgmt()" or compile the kernel
> with CFG80211_DEFAULT_PS disabled.

I built a the kernel with CFG80211_DEFAULT_PS disabled, but the kernel
error messages still appear.


Regards
Christoph