[U-Boot] TFTP pause and timeout on MX28 platforms

[U-Boot] TFTP pause and timeout on MX28 platforms

[Hector Palacios]

Hello,

When doing large TFTP downloads (files bigger than 10MiB) on my MX28 platform I'm 
sometimes experiencing pauses and timeouts. U-Boot will eventually restart the 
transmission and sometimes may successfully complete the download, but other times it 
won't.
On my platform it was somewhat mitigated (but not resolved) by reverting this patch 
from Marek:

commit 67449098a86be18cbdb27345bebe8da57e5d8899
Author: Marek Vasut <marex@denx.de>
Date:   Wed Aug 29 03:49:50 2012 +0000

     FEC: Rework the TX wait mechanism

The problem is reproducible in Freescale's MX28EVK.
The larger the file, the more chances to see the problem. Please try with 50MiB files 
or larger. Has anybody else seen it?

On an old U-Boot v2009 TFTP transmission was twice slower than with v2013, but didn't 
suffer from this.
-- 
H?ctor Palacios

[U-Boot] TFTP pause and timeout on MX28 platforms

[Marek Vasut]

Dear Hector Palacios,

> Hello,
> 
> When doing large TFTP downloads (files bigger than 10MiB) on my MX28
> platform I'm sometimes experiencing pauses and timeouts. U-Boot will
> eventually restart the transmission and sometimes may successfully
> complete the download, but other times it won't.
> On my platform it was somewhat mitigated (but not resolved) by reverting
> this patch from Marek:
> 
> commit 67449098a86be18cbdb27345bebe8da57e5d8899
> Author: Marek Vasut <marex@denx.de>
> Date:   Wed Aug 29 03:49:50 2012 +0000
> 
>      FEC: Rework the TX wait mechanism
> 
> The problem is reproducible in Freescale's MX28EVK.
> The larger the file, the more chances to see the problem. Please try with
> 50MiB files or larger. Has anybody else seen it?
> 
> On an old U-Boot v2009 TFTP transmission was twice slower than with v2013,
> but didn't suffer from this.

What version of u-boot do you use ? It was resolved in recent versions.

Best regards,
Marek Vasut

[U-Boot] TFTP pause and timeout on MX28 platforms

[Hector Palacios]

Dear Marek Vasut,

On 03/13/2013 11:58 AM, Marek Vasut wrote:
> Dear Hector Palacios,
>
>> Hello,
>>
>> When doing large TFTP downloads (files bigger than 10MiB) on my MX28
>> platform I'm sometimes experiencing pauses and timeouts. U-Boot will
>> eventually restart the transmission and sometimes may successfully
>> complete the download, but other times it won't.
>> On my platform it was somewhat mitigated (but not resolved) by reverting
>> this patch from Marek:
>>
>> commit 67449098a86be18cbdb27345bebe8da57e5d8899
>> Author: Marek Vasut <marex@denx.de>
>> Date:   Wed Aug 29 03:49:50 2012 +0000
>>
>>       FEC: Rework the TX wait mechanism
>>
>> The problem is reproducible in Freescale's MX28EVK.
>> The larger the file, the more chances to see the problem. Please try with
>> 50MiB files or larger. Has anybody else seen it?
>>
>> On an old U-Boot v2009 TFTP transmission was twice slower than with v2013,
>> but didn't suffer from this.
>
> What version of u-boot do you use ? It was resolved in recent versions.

I'm using v2013.01.
Could you please point me to the commit(s) that solve it?
The commits I see on drivers/net/fec_mxc.c after v2013.01 are from Troy Kisky and 
don't seem to address this.
Thank you,

-- 
H?ctor Palacios

[U-Boot] TFTP pause and timeout on MX28 platforms

[Marek Vasut]

Dear Hector Palacios,

> Dear Marek Vasut,
> 
> On 03/13/2013 11:58 AM, Marek Vasut wrote:
> > Dear Hector Palacios,
> > 
> >> Hello,
> >> 
> >> When doing large TFTP downloads (files bigger than 10MiB) on my MX28
> >> platform I'm sometimes experiencing pauses and timeouts. U-Boot will
> >> eventually restart the transmission and sometimes may successfully
> >> complete the download, but other times it won't.
> >> On my platform it was somewhat mitigated (but not resolved) by reverting
> >> this patch from Marek:
> >> 
> >> commit 67449098a86be18cbdb27345bebe8da57e5d8899
> >> Author: Marek Vasut <marex@denx.de>
> >> Date:   Wed Aug 29 03:49:50 2012 +0000
> >> 
> >>       FEC: Rework the TX wait mechanism
> >> 
> >> The problem is reproducible in Freescale's MX28EVK.
> >> The larger the file, the more chances to see the problem. Please try
> >> with 50MiB files or larger. Has anybody else seen it?
> >> 
> >> On an old U-Boot v2009 TFTP transmission was twice slower than with
> >> v2013, but didn't suffer from this.
> > 
> > What version of u-boot do you use ? It was resolved in recent versions.
> 
> I'm using v2013.01.
> Could you please point me to the commit(s) that solve it?
> The commits I see on drivers/net/fec_mxc.c after v2013.01 are from Troy
> Kisky and don't seem to address this.

commit c0b5a3bbb0cd40a6b23b7b07e2182a5bcdc8c31c
Author: Marek Vasut <marex@denx.de>
Date:   Wed Aug 29 03:49:51 2012 +0000

    FEC: Replace magic contants

and the three before this one. Is your PHY operating correctly? This fixed the 
hangs on multiple MX28 platforms for me.

> Thank you,

Best regards,
Marek Vasut

[U-Boot] TFTP pause and timeout on MX28 platforms

[Hector Palacios]

Dear Marek Vasut,

On 03/13/2013 05:19 PM, Marek Vasut wrote:
> Dear Hector Palacios,
>
>> Dear Marek Vasut,
>>
>> On 03/13/2013 11:58 AM, Marek Vasut wrote:
>>> Dear Hector Palacios,
>>>
>>>> Hello,
>>>>
>>>> When doing large TFTP downloads (files bigger than 10MiB) on my MX28
>>>> platform I'm sometimes experiencing pauses and timeouts. U-Boot will
>>>> eventually restart the transmission and sometimes may successfully
>>>> complete the download, but other times it won't.
>>>> On my platform it was somewhat mitigated (but not resolved) by reverting
>>>> this patch from Marek:
>>>>
>>>> commit 67449098a86be18cbdb27345bebe8da57e5d8899
>>>> Author: Marek Vasut <marex@denx.de>
>>>> Date:   Wed Aug 29 03:49:50 2012 +0000
>>>>
>>>>        FEC: Rework the TX wait mechanism
>>>>
>>>> The problem is reproducible in Freescale's MX28EVK.
>>>> The larger the file, the more chances to see the problem. Please try
>>>> with 50MiB files or larger. Has anybody else seen it?
>>>>
>>>> On an old U-Boot v2009 TFTP transmission was twice slower than with
>>>> v2013, but didn't suffer from this.
>>>
>>> What version of u-boot do you use ? It was resolved in recent versions.
>>
>> I'm using v2013.01.
>> Could you please point me to the commit(s) that solve it?
>> The commits I see on drivers/net/fec_mxc.c after v2013.01 are from Troy
>> Kisky and don't seem to address this.
>
> commit c0b5a3bbb0cd40a6b23b7b07e2182a5bcdc8c31c
> Author: Marek Vasut <marex@denx.de>
> Date:   Wed Aug 29 03:49:51 2012 +0000
>
>      FEC: Replace magic contants
>
> and the three before this one. Is your PHY operating correctly? This fixed the
> hangs on multiple MX28 platforms for me.

v2013.01 contains all these patches but I was able to reproduce this both on my 
platform and on the mx28evk.
My problem is not a hang, but TFTP pauses (1 to 3 seconds) and timeouts:
      #################################################################
      #####################################################T T T T T T

At first I thought it was my platform's PHY (Micrel KSZ8031) but I also see it on mx28evk.

-- 
H?ctor Palacios

[U-Boot] TFTP pause and timeout on MX28 platforms

[Marek Vasut]

Dear Hector Palacios,

> Dear Marek Vasut,
> 
> On 03/13/2013 05:19 PM, Marek Vasut wrote:
> > Dear Hector Palacios,
> > 
> >> Dear Marek Vasut,
> >> 
> >> On 03/13/2013 11:58 AM, Marek Vasut wrote:
> >>> Dear Hector Palacios,
> >>> 
> >>>> Hello,
> >>>> 
> >>>> When doing large TFTP downloads (files bigger than 10MiB) on my MX28
> >>>> platform I'm sometimes experiencing pauses and timeouts. U-Boot will
> >>>> eventually restart the transmission and sometimes may successfully
> >>>> complete the download, but other times it won't.
> >>>> On my platform it was somewhat mitigated (but not resolved) by
> >>>> reverting this patch from Marek:
> >>>> 
> >>>> commit 67449098a86be18cbdb27345bebe8da57e5d8899
> >>>> Author: Marek Vasut <marex@denx.de>
> >>>> Date:   Wed Aug 29 03:49:50 2012 +0000
> >>>> 
> >>>>        FEC: Rework the TX wait mechanism
> >>>> 
> >>>> The problem is reproducible in Freescale's MX28EVK.
> >>>> The larger the file, the more chances to see the problem. Please try
> >>>> with 50MiB files or larger. Has anybody else seen it?
> >>>> 
> >>>> On an old U-Boot v2009 TFTP transmission was twice slower than with
> >>>> v2013, but didn't suffer from this.
> >>> 
> >>> What version of u-boot do you use ? It was resolved in recent versions.
> >> 
> >> I'm using v2013.01.
> >> Could you please point me to the commit(s) that solve it?
> >> The commits I see on drivers/net/fec_mxc.c after v2013.01 are from Troy
> >> Kisky and don't seem to address this.
> > 
> > commit c0b5a3bbb0cd40a6b23b7b07e2182a5bcdc8c31c
> > Author: Marek Vasut <marex@denx.de>
> > Date:   Wed Aug 29 03:49:51 2012 +0000
> > 
> >      FEC: Replace magic contants
> > 
> > and the three before this one. Is your PHY operating correctly? This
> > fixed the hangs on multiple MX28 platforms for me.
> 
> v2013.01 contains all these patches but I was able to reproduce this both
> on my platform and on the mx28evk.
> My problem is not a hang, but TFTP pauses (1 to 3 seconds) and timeouts:
>       #################################################################
>       #####################################################T T T T T T
> 
> At first I thought it was my platform's PHY (Micrel KSZ8031) but I also see
> it on mx28evk.

Do you use PHYLIB (see configs/sc_sps_1.h for example)? Also check if your 
transceiver mode is not misconfigured. Moreover, see 
board/denx/m28evk/spl_boot.c fecmxc_mii_postcall(), maybe you also need to 
program some registers of the PHY (V11 and V10 prototypes used KSZ8051)?

Best regards,
Marek Vasut

[U-Boot] TFTP pause and timeout on MX28 platforms

[Hector Palacios]

Dear Marek Vasut,

On 03/13/2013 05:52 PM, Marek Vasut wrote:
> Dear Hector Palacios,
>
>> Dear Marek Vasut,
>>
>> On 03/13/2013 05:19 PM, Marek Vasut wrote:
>>> Dear Hector Palacios,
>>>
>>>> Dear Marek Vasut,
>>>>
>>>> On 03/13/2013 11:58 AM, Marek Vasut wrote:
>>>>> Dear Hector Palacios,
>>>>>
>>>>>> Hello,
>>>>>>
>>>>>> When doing large TFTP downloads (files bigger than 10MiB) on my MX28
>>>>>> platform I'm sometimes experiencing pauses and timeouts. U-Boot will
>>>>>> eventually restart the transmission and sometimes may successfully
>>>>>> complete the download, but other times it won't.
>>>>>> On my platform it was somewhat mitigated (but not resolved) by
>>>>>> reverting this patch from Marek:
>>>>>>
>>>>>> commit 67449098a86be18cbdb27345bebe8da57e5d8899
>>>>>> Author: Marek Vasut <marex@denx.de>
>>>>>> Date:   Wed Aug 29 03:49:50 2012 +0000
>>>>>>
>>>>>>         FEC: Rework the TX wait mechanism
>>>>>>
>>>>>> The problem is reproducible in Freescale's MX28EVK.
>>>>>> The larger the file, the more chances to see the problem. Please try
>>>>>> with 50MiB files or larger. Has anybody else seen it?
>>>>>>
>>>>>> On an old U-Boot v2009 TFTP transmission was twice slower than with
>>>>>> v2013, but didn't suffer from this.
>>>>>
>>>>> What version of u-boot do you use ? It was resolved in recent versions.
>>>>
>>>> I'm using v2013.01.
>>>> Could you please point me to the commit(s) that solve it?
>>>> The commits I see on drivers/net/fec_mxc.c after v2013.01 are from Troy
>>>> Kisky and don't seem to address this.
>>>
>>> commit c0b5a3bbb0cd40a6b23b7b07e2182a5bcdc8c31c
>>> Author: Marek Vasut <marex@denx.de>
>>> Date:   Wed Aug 29 03:49:51 2012 +0000
>>>
>>>       FEC: Replace magic contants
>>>
>>> and the three before this one. Is your PHY operating correctly? This
>>> fixed the hangs on multiple MX28 platforms for me.
>>
>> v2013.01 contains all these patches but I was able to reproduce this both
>> on my platform and on the mx28evk.
>> My problem is not a hang, but TFTP pauses (1 to 3 seconds) and timeouts:
>>        #################################################################
>>        #####################################################T T T T T T
>>
>> At first I thought it was my platform's PHY (Micrel KSZ8031) but I also see
>> it on mx28evk.
>
> Do you use PHYLIB (see configs/sc_sps_1.h for example)? Also check if your
> transceiver mode is not misconfigured. Moreover, see
> board/denx/m28evk/spl_boot.c fecmxc_mii_postcall(), maybe you also need to
> program some registers of the PHY (V11 and V10 prototypes used KSZ8051)?

No I don't use PHYLIB. My platform is based on Freescale's mx28evk (not DENX's 
m28evk). I saw fecmxc_mii_postcall() and I do a similar thing because of my phy model 
KSZ8031, but as I said the pauses and timeouts occur in both platforms (mx28evk uses a 
different PHY: SMSC LAN8720a).

Are you able to download a 50MiB file via TFTP several times without any problem on 
m28evk?

Best regards,
-- 
H?ctor Palacios

[U-Boot] TFTP pause and timeout on MX28 platforms

[Marek Vasut]

Dear Hector Palacios,

> Dear Marek Vasut,
> 
> On 03/13/2013 05:52 PM, Marek Vasut wrote:
> > Dear Hector Palacios,
> > 
> >> Dear Marek Vasut,
> >> 
> >> On 03/13/2013 05:19 PM, Marek Vasut wrote:
> >>> Dear Hector Palacios,
> >>> 
> >>>> Dear Marek Vasut,
> >>>> 
> >>>> On 03/13/2013 11:58 AM, Marek Vasut wrote:
> >>>>> Dear Hector Palacios,
> >>>>> 
> >>>>>> Hello,
> >>>>>> 
> >>>>>> When doing large TFTP downloads (files bigger than 10MiB) on my MX28
> >>>>>> platform I'm sometimes experiencing pauses and timeouts. U-Boot will
> >>>>>> eventually restart the transmission and sometimes may successfully
> >>>>>> complete the download, but other times it won't.
> >>>>>> On my platform it was somewhat mitigated (but not resolved) by
> >>>>>> reverting this patch from Marek:
> >>>>>> 
> >>>>>> commit 67449098a86be18cbdb27345bebe8da57e5d8899
> >>>>>> Author: Marek Vasut <marex@denx.de>
> >>>>>> Date:   Wed Aug 29 03:49:50 2012 +0000
> >>>>>> 
> >>>>>>         FEC: Rework the TX wait mechanism
> >>>>>> 
> >>>>>> The problem is reproducible in Freescale's MX28EVK.
> >>>>>> The larger the file, the more chances to see the problem. Please try
> >>>>>> with 50MiB files or larger. Has anybody else seen it?
> >>>>>> 
> >>>>>> On an old U-Boot v2009 TFTP transmission was twice slower than with
> >>>>>> v2013, but didn't suffer from this.
> >>>>> 
> >>>>> What version of u-boot do you use ? It was resolved in recent
> >>>>> versions.
> >>>> 
> >>>> I'm using v2013.01.
> >>>> Could you please point me to the commit(s) that solve it?
> >>>> The commits I see on drivers/net/fec_mxc.c after v2013.01 are from
> >>>> Troy Kisky and don't seem to address this.
> >>> 
> >>> commit c0b5a3bbb0cd40a6b23b7b07e2182a5bcdc8c31c
> >>> Author: Marek Vasut <marex@denx.de>
> >>> Date:   Wed Aug 29 03:49:51 2012 +0000
> >>> 
> >>>       FEC: Replace magic contants
> >>> 
> >>> and the three before this one. Is your PHY operating correctly? This
> >>> fixed the hangs on multiple MX28 platforms for me.
> >> 
> >> v2013.01 contains all these patches but I was able to reproduce this
> >> both on my platform and on the mx28evk.
> >> 
> >> My problem is not a hang, but TFTP pauses (1 to 3 seconds) and timeouts:
> >>        #################################################################
> >>        #####################################################T T T T T T
> >> 
> >> At first I thought it was my platform's PHY (Micrel KSZ8031) but I also
> >> see it on mx28evk.
> > 
> > Do you use PHYLIB (see configs/sc_sps_1.h for example)? Also check if
> > your transceiver mode is not misconfigured. Moreover, see
> > board/denx/m28evk/spl_boot.c fecmxc_mii_postcall(), maybe you also need
> > to program some registers of the PHY (V11 and V10 prototypes used
> > KSZ8051)?
> 
> No I don't use PHYLIB. My platform is based on Freescale's mx28evk (not
> DENX's m28evk). I saw fecmxc_mii_postcall() and I do a similar thing
> because of my phy model KSZ8031, but as I said the pauses and timeouts
> occur in both platforms (mx28evk uses a different PHY: SMSC LAN8720a).
> 
> Are you able to download a 50MiB file via TFTP several times without any
> problem on m28evk?

Yes.

btw. the original TFTP had size limit of 32MB, aren't you hitting this?

Best regards,
Marek Vasut

[U-Boot] TFTP pause and timeout on MX28 platforms

[Fabio Estevam]

On Wed, Mar 13, 2013 at 2:14 PM, Hector Palacios
<hector.palacios@digi.com> wrote:

> No I don't use PHYLIB. My platform is based on Freescale's mx28evk (not
> DENX's m28evk). I saw fecmxc_mii_postcall() and I do a similar thing because
> of my phy model KSZ8031, but as I said the pauses and timeouts occur in both
> platforms (mx28evk uses a different PHY: SMSC LAN8720a).

Just tried adding:

#define CONFIG_PHYLIB
#define CONFIG_PHY_SMSC

but LAN8270 is not getting detected.

CPU:   Freescale i.MX28 rev1.2 at 454 MHz
BOOT:  SSP SD/MMC #0, 3V3
I2C:   ready
DRAM:  128 MiB
MMC:   MXS MMC: 0
In:    serial
Out:   serial
Err:   serial
Net:   Phy not found
FEC0 [PRIME], FEC1
Hit any key to stop autoboot:  0
MX28EVK U-Boot >

I tried a 50MB tftp transfer here on mx28evk and I do see like 2 or 3
pauses during the transfer.

[U-Boot] TFTP pause and timeout on MX28 platforms

[Hector Palacios]

Dear Marek Vasut,

On 03/13/2013 07:10 PM, Marek Vasut wrote:
> Dear Hector Palacios,
>
>> Dear Marek Vasut,
>>
>> On 03/13/2013 05:52 PM, Marek Vasut wrote:
>>> Dear Hector Palacios,
>>>
>>>> Dear Marek Vasut,
>>>>
>>>> On 03/13/2013 05:19 PM, Marek Vasut wrote:
>>>>> Dear Hector Palacios,
>>>>>
>>>>>> Dear Marek Vasut,
>>>>>>
>>>>>> On 03/13/2013 11:58 AM, Marek Vasut wrote:
>>>>>>> Dear Hector Palacios,
>>>>>>>
>>>>>>>> Hello,
>>>>>>>>
>>>>>>>> When doing large TFTP downloads (files bigger than 10MiB) on my MX28
>>>>>>>> platform I'm sometimes experiencing pauses and timeouts. U-Boot will
>>>>>>>> eventually restart the transmission and sometimes may successfully
>>>>>>>> complete the download, but other times it won't.
>>>>>>>> On my platform it was somewhat mitigated (but not resolved) by
>>>>>>>> reverting this patch from Marek:
>>>>>>>>
>>>>>>>> commit 67449098a86be18cbdb27345bebe8da57e5d8899
>>>>>>>> Author: Marek Vasut <marex@denx.de>
>>>>>>>> Date:   Wed Aug 29 03:49:50 2012 +0000
>>>>>>>>
>>>>>>>>          FEC: Rework the TX wait mechanism
>>>>>>>>
>>>>>>>> The problem is reproducible in Freescale's MX28EVK.
>>>>>>>> The larger the file, the more chances to see the problem. Please try
>>>>>>>> with 50MiB files or larger. Has anybody else seen it?
>>>>>>>>
>>>>>>>> On an old U-Boot v2009 TFTP transmission was twice slower than with
>>>>>>>> v2013, but didn't suffer from this.
>>>>>>>
>>>>>>> What version of u-boot do you use ? It was resolved in recent
>>>>>>> versions.
>>>>>>
>>>>>> I'm using v2013.01.
>>>>>> Could you please point me to the commit(s) that solve it?
>>>>>> The commits I see on drivers/net/fec_mxc.c after v2013.01 are from
>>>>>> Troy Kisky and don't seem to address this.
>>>>>
>>>>> commit c0b5a3bbb0cd40a6b23b7b07e2182a5bcdc8c31c
>>>>> Author: Marek Vasut <marex@denx.de>
>>>>> Date:   Wed Aug 29 03:49:51 2012 +0000
>>>>>
>>>>>        FEC: Replace magic contants
>>>>>
>>>>> and the three before this one. Is your PHY operating correctly? This
>>>>> fixed the hangs on multiple MX28 platforms for me.
>>>>
>>>> v2013.01 contains all these patches but I was able to reproduce this
>>>> both on my platform and on the mx28evk.
>>>>
>>>> My problem is not a hang, but TFTP pauses (1 to 3 seconds) and timeouts:
>>>>         #################################################################
>>>>         #####################################################T T T T T T
>>>>
>>>> At first I thought it was my platform's PHY (Micrel KSZ8031) but I also
>>>> see it on mx28evk.
>>>
>>> Do you use PHYLIB (see configs/sc_sps_1.h for example)? Also check if
>>> your transceiver mode is not misconfigured. Moreover, see
>>> board/denx/m28evk/spl_boot.c fecmxc_mii_postcall(), maybe you also need
>>> to program some registers of the PHY (V11 and V10 prototypes used
>>> KSZ8051)?
>>
>> No I don't use PHYLIB. My platform is based on Freescale's mx28evk (not
>> DENX's m28evk). I saw fecmxc_mii_postcall() and I do a similar thing
>> because of my phy model KSZ8031, but as I said the pauses and timeouts
>> occur in both platforms (mx28evk uses a different PHY: SMSC LAN8720a).
>>
>> Are you able to download a 50MiB file via TFTP several times without any
>> problem on m28evk?
>
> Yes.

Interesting. What PHY does m28evk platform have? I was thinking on a problem of the 
fec driver given that it can be reproduced in the mx28evk and in my platform, with 
different PHYs, but if it is not reproducible in m28evk I'll need to recheck the 
platform code.

> btw. the original TFTP had size limit of 32MB, aren't you hitting this?

No it's not a server problem. I can sometimes transfer bigger files without problems. 
Other times it just pauses and/or timeouts after 3 or 4MiB.

Thank you
-- 
H?ctor Palacios

[U-Boot] TFTP pause and timeout on MX28 platforms

[Marek Vasut]

Dear Hector Palacios,

> Dear Marek Vasut,
> 
> On 03/13/2013 07:10 PM, Marek Vasut wrote:
> > Dear Hector Palacios,
> > 
> >> Dear Marek Vasut,
> >> 
> >> On 03/13/2013 05:52 PM, Marek Vasut wrote:
> >>> Dear Hector Palacios,
> >>> 
> >>>> Dear Marek Vasut,
> >>>> 
> >>>> On 03/13/2013 05:19 PM, Marek Vasut wrote:
> >>>>> Dear Hector Palacios,
> >>>>> 
> >>>>>> Dear Marek Vasut,
> >>>>>> 
> >>>>>> On 03/13/2013 11:58 AM, Marek Vasut wrote:
> >>>>>>> Dear Hector Palacios,
> >>>>>>> 
> >>>>>>>> Hello,
> >>>>>>>> 
> >>>>>>>> When doing large TFTP downloads (files bigger than 10MiB) on my
> >>>>>>>> MX28 platform I'm sometimes experiencing pauses and timeouts.
> >>>>>>>> U-Boot will eventually restart the transmission and sometimes may
> >>>>>>>> successfully complete the download, but other times it won't.
> >>>>>>>> On my platform it was somewhat mitigated (but not resolved) by
> >>>>>>>> reverting this patch from Marek:
> >>>>>>>> 
> >>>>>>>> commit 67449098a86be18cbdb27345bebe8da57e5d8899
> >>>>>>>> Author: Marek Vasut <marex@denx.de>
> >>>>>>>> Date:   Wed Aug 29 03:49:50 2012 +0000
> >>>>>>>> 
> >>>>>>>>          FEC: Rework the TX wait mechanism
> >>>>>>>> 
> >>>>>>>> The problem is reproducible in Freescale's MX28EVK.
> >>>>>>>> The larger the file, the more chances to see the problem. Please
> >>>>>>>> try with 50MiB files or larger. Has anybody else seen it?
> >>>>>>>> 
> >>>>>>>> On an old U-Boot v2009 TFTP transmission was twice slower than
> >>>>>>>> with v2013, but didn't suffer from this.
> >>>>>>> 
> >>>>>>> What version of u-boot do you use ? It was resolved in recent
> >>>>>>> versions.
> >>>>>> 
> >>>>>> I'm using v2013.01.
> >>>>>> Could you please point me to the commit(s) that solve it?
> >>>>>> The commits I see on drivers/net/fec_mxc.c after v2013.01 are from
> >>>>>> Troy Kisky and don't seem to address this.
> >>>>> 
> >>>>> commit c0b5a3bbb0cd40a6b23b7b07e2182a5bcdc8c31c
> >>>>> Author: Marek Vasut <marex@denx.de>
> >>>>> Date:   Wed Aug 29 03:49:51 2012 +0000
> >>>>> 
> >>>>>        FEC: Replace magic contants
> >>>>> 
> >>>>> and the three before this one. Is your PHY operating correctly? This
> >>>>> fixed the hangs on multiple MX28 platforms for me.
> >>>> 
> >>>> v2013.01 contains all these patches but I was able to reproduce this
> >>>> both on my platform and on the mx28evk.
> >>>> 
> >>>> My problem is not a hang, but TFTP pauses (1 to 3 seconds) and timeouts:
> >>>>         ##############################################################
> >>>>         ### #####################################################T T T
> >>>>         T T T
> >>>> 
> >>>> At first I thought it was my platform's PHY (Micrel KSZ8031) but I
> >>>> also see it on mx28evk.
> >>> 
> >>> Do you use PHYLIB (see configs/sc_sps_1.h for example)? Also check if
> >>> your transceiver mode is not misconfigured. Moreover, see
> >>> board/denx/m28evk/spl_boot.c fecmxc_mii_postcall(), maybe you also need
> >>> to program some registers of the PHY (V11 and V10 prototypes used
> >>> KSZ8051)?
> >> 
> >> No I don't use PHYLIB. My platform is based on Freescale's mx28evk (not
> >> DENX's m28evk). I saw fecmxc_mii_postcall() and I do a similar thing
> >> because of my phy model KSZ8031, but as I said the pauses and timeouts
> >> occur in both platforms (mx28evk uses a different PHY: SMSC LAN8720a).
> >> 
> >> Are you able to download a 50MiB file via TFTP several times without any
> >> problem on m28evk?
> > 
> > Yes.
> 
> Interesting. What PHY does m28evk platform have? I was thinking on a
> problem of the fec driver given that it can be reproduced in the mx28evk
> and in my platform, with different PHYs, but if it is not reproducible in
> m28evk I'll need to recheck the platform code.

KSZ8021 I think. Did Fabio not verify the code works on his MX28EVK ?

> > btw. the original TFTP had size limit of 32MB, aren't you hitting this?
> 
> No it's not a server problem. I can sometimes transfer bigger files without
> problems. Other times it just pauses and/or timeouts after 3 or 4MiB.
> 
> Thank you

Best regards,
Marek Vasut

[U-Boot] TFTP pause and timeout on MX28 platforms

[Fabio Estevam]

On Thu, Mar 14, 2013 at 9:31 AM, Marek Vasut <marex@denx.de> wrote:

>> Interesting. What PHY does m28evk platform have? I was thinking on a
>> problem of the fec driver given that it can be reproduced in the mx28evk
>> and in my platform, with different PHYs, but if it is not reproducible in
>> m28evk I'll need to recheck the platform code.
>
> KSZ8021 I think. Did Fabio not verify the code works on his MX28EVK ?

After reading this thread, I tested yesterday a 50MB tftp transfer on
mx28evk and I do see around two or three pauses/timeouts during the
transfer.