DPAA Ethernet traffice troubles with Linux kernel

[Joakim Tjernlund]

On Thu, 1970-01-01 at 00:00 +0000, Madalin-cristian Bucur wrote:
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> 
> > -----Original Message-----
> > From: Joakim Tjernlund [mailto:Joakim.Tjernlund at infinera.com]
> > Sent: Tuesday, January 16, 2018 7:58 PM
> > To: andrew at lunn.ch
> > Subject: Re: DPAA Ethernet traffice troubles with Linux kernel
> > 
> > On Thu, 1970-01-01 at 00:00 +0000, Andrew Lunn wrote:
> > > 
> > > Hi Joakim
> > > 
> > > You appear to be using an old kernel. Take a look at:
> > 
> > Not really, I am using 4.14.x and I don't think that is old. Seems like
> > this
> > patch hasn't been sent to 4.14.x.
> > 
> > I wonder if I might be missing something else, we just moved to 4.14 and
> > notic that all
> > our fixed PHYs are non functioning:
> > fsl_mac ffe4e2000.ethernet: FMan MEMAC
> > fsl_mac ffe4e2000.ethernet: FMan MAC address: 00:06:9c:0b:06:20
> > fsl_mac dpaa-ethernet.0: __devm_request_mem_region(mac) failed
> > fsl_mac: probe of dpaa-ethernet.0 failed with error -16
> > fsl_mac ffe4e4000.ethernet: FMan MEMAC
> > fsl_mac ffe4e4000.ethernet: FMan MAC address: 00:06:9c:0b:06:21
> > fsl_mac dpaa-ethernet.1: __devm_request_mem_region(mac) failed
> > fsl_mac: probe of dpaa-ethernet.1 failed with error -16
> > fsl_mac ffe4e6000.ethernet: FMan MEMAC
> > fsl_mac ffe4e6000.ethernet: FMan MAC address: 00:06:9c:0b:06:22
> > fsl_mac dpaa-ethernet.2: __devm_request_mem_region(mac) failed
> > fsl_mac: probe of dpaa-ethernet.2 failed with error -16
> > fsl_mac ffe4e8000.ethernet: FMan MEMAC
> > fsl_mac ffe4e8000.ethernet: FMan MAC address: 00:06:9c:0b:06:23
> > fsl_mac dpaa-ethernet.3: __devm_request_mem_region(mac) failed
> > fsl_mac: probe of dpaa-ethernet.3 failed with error -16
> > 
> > Feels like FMAN still think there are real PHYs there ?
> 
> Hi Joakim,
> 
> These errors are issued when trying to probe the second time the same
> MAC node. The issue was introduced by this commit:
> 
> commit 4d8ee1935bcd666360311dfdadeee235d682d69a
> Author: Florian Fainelli <f.fainelli at gmail.com>
> Date: Tue Aug 22 15:24:47 2017 -0700
> fsl/man: Inherit parent device and of_node
> 
> and was later addressed by this patch set:
> 
> http://patchwork.ozlabs.org/project/netdev/list/?series=8462&state=*
> 
> Even with these errors printed, all is working fine, it's just the
> second probing that fails. Adding the latter patches or reverting
> the one above makes the errors prints dissapear.
> 
> Madalin

Ahh, now it starts to look better, reverting "fsl/man: Inherit parent device and of_node" on 4.14 gives:
libphy: Fixed MDIO Bus: probed
tun: Universal TUN/TAP device driver, 1.6
libphy: Freescale XGMAC MDIO Bus: probed
iommu: Adding device ffe488000.port to group 10
libphy: Freescale XGMAC MDIO Bus: probed
mdio_bus ffe4e1000: Error while reading PHY0 reg at 3.3
iommu: Adding device ffe489000.port to group 22
libphy: Freescale XGMAC MDIO Bus: probed
mdio_bus ffe4e3000: Error while reading PHY0 reg at 3.3
iommu: Adding device ffe48a000.port to group 23
libphy: Freescale XGMAC MDIO Bus: probed
mdio_bus ffe4e5000: Error while reading PHY0 reg at 3.3
iommu: Adding device ffe48b000.port to group 24
libphy: Freescale XGMAC MDIO Bus: probed
mdio_bus ffe4e7000: Error while reading PHY0 reg at 3.3
iommu: Adding device ffe48c000.port to group 25
libphy: Freescale XGMAC MDIO Bus: probed
mdio_bus ffe4e9000: Error while reading PHY0 reg at 3.3
fsl_mac ffe4e2000.ethernet: FMan MEMAC
fsl_mac ffe4e2000.ethernet: FMan MAC address: 00:06:9c:0b:06:20
fsl_mac ffe4e4000.ethernet: FMan MEMAC
fsl_mac ffe4e4000.ethernet: FMan MAC address: 00:06:9c:0b:06:21
fsl_mac ffe4e6000.ethernet: FMan MEMAC
fsl_mac ffe4e6000.ethernet: FMan MAC address: 00:06:9c:0b:06:22
fsl_mac ffe4e8000.ethernet: FMan MEMAC
fsl_mac ffe4e8000.ethernet: FMan MAC address: 00:06:9c:0b:06:23
fsl_mac ffe4e0000.ethernet: FMan MEMAC
fsl_mac ffe4e0000.ethernet: FMan MAC address: 00:06:9c:0b:06:1f
fsl_dpa dpaa-ethernet.0 eth0: Probed interface eth0
fsl_dpa dpaa-ethernet.1 eth1: Probed interface eth1
fsl_dpa dpaa-ethernet.2 eth2: Probed interface eth2
fsl_dpa dpaa-ethernet.3 eth3: Probed interface eth3
fsl_dpa dpaa-ethernet.4 eth4: Probed interface eth4

Still some minor errors: mdio_bus ffe4e7000: Error while reading PHY0 reg at 3.3
but this is going the right way(I have not had a chance to try if they work due
to external modules not ported/ready yet)

The other patch series is still to be tested though but I already now wanted 
to stress the importance of getting all upstream fixes into stable, ASAP.
You now what they are, I have no idea.

Thanks 
       Jocke