netdev - Re: DPAA Ethernet traffice troubles with Linux kernel

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Date:   Thu, 18 Jan 2018 09:04:02 +0000
From:   Joakim Tjernlund <Joakim.Tjernlund@...inera.com>
To:     "madalin.bucur@....com" <madalin.bucur@....com>,
        "andrew@...n.ch" <andrew@...n.ch>
CC:     "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "madskateman@...il.com" <madskateman@...il.com>
Subject: Re: DPAA Ethernet traffice troubles with Linux kernel

On Thu, 1970-01-01 at 00:00 +0000, Joakim Tjernlund wrote:
> On Thu, 1970-01-01 at 00:00 +0000, Madalin-cristian Bucur wrote:
> > CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe.
> > 
> > 
> > > -----Original Message-----
> > > From: Joakim Tjernlund [mailto:Joakim.Tjernlund@...inera.com]
> > > Sent: Tuesday, January 16, 2018 7:58 PM
> > > To: andrew@...n.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@...il.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.

FYI, applied http://patchwork.ozlabs.org/project/netdev/list/?series=8462&state=* on 4.14.x
and I still see:
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

Other than that, FMAN appears to be working.

 Jocke