[U-Boot] efi_loader triggers fec_mxc messages when booting off mmc

[Heinrich Schuchardt]

Hello Jonathan,

the only place where I can find a string 'error frame:' is in
drivers/net/fec_mxc (line 885).

It indicates that any of the following conditions was met
Frame length violation
Nonoctet align frame
Receive BD status: CRC error
Receive FIFO overrun
Receive BD status: Frame is truncated

A receive FIFO overrun can be expected if network packages are not
processed.

With the network patches we check if a package is available quite often.

I think that printf should be replaced by debug here like in other
drivers (drivers/net/ethoc.c:383).

Further drivers that will print an error message if an overrun occurs are:
drivers/net/mvneta.c:952 (Marvell Armada 385 network interface)
drivers/net/mvpp2.c:4458 (Marvell Armada 375/7K/8K network interface)

Best regards

Heinrich

On 10/15/2017 04:36 AM, Jonathan Gray wrote:
> After the recent changes to add SimpleNetworkProtocol to efi_loader
> when booting off mmc via an efi payload that doesn't use
> SimpleNetworkProtocol U-Boot's fec_mxc driver will now display
> various "error frame" messages.
> 
> U-Boot SPL 2017.11-rc1-00277-g7b342d8c5d (Oct 15 2017 - 12:55:50)
> Trying to boot from MMC1
> 
> 
> U-Boot 2017.11-rc1-00277-g7b342d8c5d (Oct 15 2017 - 12:55:50 +1100)
> 
> CPU:   Freescale i.MX6Q rev1.5 996 MHz (running at 792 MHz)
> CPU:   Extended Commercial temperature grade (-20C to 105C) at 32C
> Reset cause: WDOG
> Board: MX6 Cubox-i
> DRAM:  2 GiB
> MMC:   FSL_SDHC: 0
> No panel detected: default to HDMI
> Display: HDMI (1024x768)
> In:    serial
> Out:   serial
> Err:   serial
> Net:   FEC
> Hit any key to stop autoboot:  0
> switch to partitions #0, OK
> mmc0 is current device
> Scanning mmc 0:1...
> reading /imx6q-cubox-i.dtb
> 37669 bytes read in 20 ms (1.8 MiB/s)
> Found EFI removable media binary efi/boot/bootarm.efi
> Scanning disks on usb...
> Scanning disks on mmc...
> MMC Device 1 not found
> MMC Device 2 not found
> MMC Device 3 not found
> Scanning disks on sata...
> Found 6 disks
> reading efi/boot/bootarm.efi
> 67372 bytes read in 32 ms (2 MiB/s)
> ## Starting EFI application at 12000000 ...
>>> OpenBSD/armv7 BOOTARM 1.0
> error frame: 0x8f57ec40 0x00003d74
> error frame: 0x8f57ec40 0x00007079
> error frame: 0x8f57ec40 0x00006964
> error frame: 0x8f57ec40 0x00006f6f
> error frame: 0x8f57ec40 0x0000726f
> error frame: 0x8f57ec40 0x00002074
> error frame: 0x8f57ec40 0x00006f6f
> boot> error frame: 0x8f57ec40 0x00007465
> error frame: 0x8f57ec80 0x00007220
> error frame: 0x8f57ec80 0x00006374
> error frame: 0x8f57ec80 0x00007261
> error frame: 0x8f57ec80 0x00006f64
> error frame: 0x8f57ec80 0x0000385f
> error frame: 0x8f57ec80 0x00002d31
> error frame: 0x8f57ec80 0x00006431
> error frame: 0x8f57ec80 0x0000302d
> error frame: 0x8f57ecc0 0x00003233
> error frame: 0x8f57ecc0 0x00006e49
> error frame: 0x8f57ecc0 0x00006e6f
> error frame: 0x8f57ecc0 0x00007472
> error frame: 0x8f57ecc0 0x0000622c
> error frame: 0x8f57ecc0 0x00006f6c
> error frame: 0x8f57ecc0 0x00003030
> error frame: 0x8f57ecc0 0x00003030
> error frame: 0x8f57ed00 0x0000645f
> error frame: 0x8f57ed00 0x00006966
> error frame: 0x8f57ed00 0x0000642f
> error frame: 0x8f57ed00 0x00006274
> error frame: 0x8f57ed00 0x0000746e
> error frame: 0x8f57ed00 0x00006466
> error frame: 0x8f57ed00 0x00006d69
> error frame: 0x8f57ed00 0x00006f62
> error frame: 0x8f57ed40 0x00000062
> error frame: 0x8f57ed40 0x0000463d
> error frame: 0x8f57ed40 0x00006461
> error frame: 0x8f57ed40 0x00003336
> error frame: 0x8f57ed40 0x0000383a
> error frame: 0x8f57ed40 0x00007464
> error frame: 0x8f57ed40 0x00007830
> error frame: 0x8f57ed40 0x00003030
> error frame: 0x8f57ed80 0x00006464
> error frame: 0x8f57ed80 0x00003831
> error frame: 0x8f57ed80 0x00003d68
> error frame: 0x8f57ed80 0x00006666
> error frame: 0x8f57ed80 0x00006461
> error frame: 0x8f57ed80 0x00003030
> error frame: 0x8f57ed80 0x00006674
> error frame: 0x8f57edc0 0x00003678
> error frame: 0x8f57edc0 0x00002d78
> error frame: 0x8f57edc0 0x00006966
> error frame: 0x8f57edc0 0x0000313d
> error frame: 0x8f57edc0 0x00000030
> error frame: 0x8f57edc0 0x0000657a
> error frame: 0x8f57edc0 0x0000693d
> error frame: 0x8f57ee00 0x00002420
> error frame: 0x8f57ee00 0x0000616e
> error frame: 0x8f57ee00 0x00004d55
> error frame: 0x8f57ee00 0x00005241
> error frame: 0x8f57ee00 0x00006574
> error frame: 0x8f57ee00 0x00007261
> error frame: 0x8f57ee00 0x0000203d
> error frame: 0x8f57ee00 0x00007420
> 
> booting sd0a:/bsd: 3926840+164812+561396|[283058+90+521360+245040]=0x571a54
> Writing to MMC(0)... done
> 
> OpenBSD/armv7 booting ...
>