Re: [microblaze-uclinux] Problems with networking

[John Williams <jwilliams@itee.uq.edu.au>]

Hi Eric,

Hansen Eric wrote:
> - Link led ist alight
> - /proc/net is accessible
> - ifconfig works as expected

Can you post the output of "ifconfig -a"

> - ping of the local ip

That proves kernel TCP/IP is working, but packets to local ip are routed 
internally via the loopback driver.

> - ifconfig reports a number of rx and tx packages
>   with tx being exactly the number of packages
>   send by ping

On the lo interface?  What about the eth0 interface?

> - my hub seems to receive something, at least the
>   led on my hub is flickering when ping is 
>   sending ist packages
> 
> The only problem is thst somehow no connection is
> established. 

What is the output from ping?  You must use the standalone ping that is 
under "network applications".  For some reason, busybox ping doesn't 
seem to work.  I haven't spent time to find out why.

> john posted here. Unfortunately ./linux-2.4.x/.configure is
> missing. In the configuration process i turned on:
> 
> ethernet driver
> networking support
> tcp/ip networking,
> unix domain sockets
> ethernet (10 or 100MBit)
> 
> after booting the kernel I used ifconfig to configure
> the network:
> 
> ifconfig eth0 192.168.0.242 netmask 255.255.255.0 up
> ifconfig lo 127.0.0.1 up

All looks reasonable - I specifcy a broadcast parameter to ifconfig as well:

broadcast 192.168.0.255

but i'm not certain it's essential.

Linux networking complies with some RFC that says "silently discard all 
invalid packets".  So, there are many places inside the tcp/ip code 
where packets can be silently dropped.  In debugging the network driver 
I went through and put printk's in all of these, to see where my packets 
where going.

Some obvious advice, make sure you are up to date with the CVS tree and 
also the latest toolchain (see my web site).

> furthermore i experimented with route.

I haven't found that necessary - microblaze1 lives happily on our 
corporate LAN and is DNS enabled etc.. I can wget pages from out in the 
big bad internet! :)

> Has anyone an idea what I am missing?

It all sounds reasonable so far.  Attached is my linux latest kernel 
configuration file, maybe it helps.  This configuration is fully 
supporting networking - boa, NFS, etc etc.

You should probably also disable the dcache, and enable icache.  The 
version of microblaze in EDK3.2 (and 6.1 pre SP1) contains a bug in the 
dcache implementation.  I think the fix is in the first service pack.

Regards,

John
#
# Automatically generated make config: don't edit
#
CONFIG_MICROBLAZE_UARTLITE_CONFIG_DATA={{0xFFFF2000, 1},{0xFFFF4000, 2}}
CONFIG_SNOOBAR=123456
CONFIG_UCLINUX=y
CONFIG_UID16=y
CONFIG_RWSEM_GENERIC_SPINLOCK=y
# CONFIG_RWSEM_XCHGADD_ALGORITHM is not set
# CONFIG_ISA is not set
# CONFIG_ISAPNP is not set
# CONFIG_EISA is not set
# CONFIG_MCA is not set

#
# Code maturity level options
#
CONFIG_EXPERIMENTAL=y

#
# Loadable module support
#
# CONFIG_MODULES is not set
CONFIG_MICROBLAZE=y

#
# Processor type and features
#
CONFIG_MICROBLAZE_HARD_MULT=y
CONFIG_MICROBLAZE_HARD_DIV=y
CONFIG_MICROBLAZE_HARD_BARREL=y
CONFIG_MICROBLAZE_ICACHE=y
CONFIG_MICROBLAZE_DCACHE=y
CONFIG_XILINX_GPIO=y
CONFIG_XILINX_ENET=y
CONFIG_CPU_CLOCK_FREQ=66666666
CONFIG_ZERO_BSS=y

#
# Platform
#
CONFIG_MBVANILLA=y
# CONFIG_EGRET01 is not set

#
# Debug Logging
#
CONFIG_MICROBLAZE_DEBUGGING=y

#
# General setup
#
CONFIG_NET=y
# CONFIG_DISK is not set
# CONFIG_HOTPLUG is not set
# CONFIG_PCMCIA is not set
# CONFIG_SYSVIPC is not set
# CONFIG_BSD_PROCESS_ACCT is not set
# CONFIG_SYSCTL is not set
CONFIG_KCORE_ELF=y
# CONFIG_KCORE_AOUT is not set
CONFIG_BINFMT_FLAT=y
CONFIG_BINFMT_ZFLAT=y
# CONFIG_CONTIGUOUS_PAGE_ALLOC is not set
# CONFIG_MEM_MAP is not set
# CONFIG_NO_MMU_LARGE_ALLOCS is not set

#
# Memory Technology Devices (MTD)
#
CONFIG_MTD=y
# CONFIG_MTD_DEBUG is not set
CONFIG_MTD_PARTITIONS=y
# CONFIG_MTD_CONCAT is not set
# CONFIG_MTD_REDBOOT_PARTS is not set
# CONFIG_MTD_CMDLINE_PARTS is not set

#
# User Modules And Translation Layers
#
CONFIG_MTD_CHAR=y
CONFIG_MTD_BLOCK=y
# CONFIG_FTL is not set
# CONFIG_NFTL is not set
# CONFIG_INFTL is not set

#
# RAM/ROM/Flash chip drivers
#
CONFIG_MTD_CFI=y
CONFIG_MTD_JEDECPROBE=y
CONFIG_MTD_GEN_PROBE=y
# CONFIG_MTD_CFI_ADV_OPTIONS is not set
# CONFIG_MTD_CFI_INTELEXT is not set
CONFIG_MTD_CFI_AMDSTD=y
# CONFIG_MTD_CFI_STAA is not set
CONFIG_MTD_RAM=y
# CONFIG_MTD_ROM is not set
# CONFIG_MTD_ABSENT is not set
# CONFIG_MTD_OBSOLETE_CHIPS is not set
# CONFIG_MTD_AMDSTD is not set
# CONFIG_MTD_SHARP is not set
# CONFIG_MTD_JEDEC is not set

#
# Mapping drivers for chip access
#
# CONFIG_MTD_PHYSMAP is not set
# CONFIG_MTD_DRAGONIX is not set
# CONFIG_MTD_NETtel is not set
# CONFIG_MTD_SNAPGEODE is not set
# CONFIG_MTD_NETteluC is not set
CONFIG_MTD_MBVANILLA=y
# CONFIG_FLASHAUTO is not set
# CONFIG_FLASH128KB is not set
# CONFIG_FLASH1MB is not set
# CONFIG_FLASH2MB is not set
# CONFIG_FLASH4MB is not set
# CONFIG_FLASH6MB is not set
CONFIG_FLASH8MB=y
# CONFIG_MTD_KeyTechnology is not set
# CONFIG_MTD_UCLINUX is not set
# CONFIG_MTD_PCI is not set
# CONFIG_MTD_PCMCIA is not set

#
# Self-contained MTD device drivers
#
# CONFIG_MTD_PMC551 is not set
# CONFIG_MTD_SLRAM is not set
# CONFIG_MTD_MTDRAM is not set
# CONFIG_MTD_BLKMTD is not set

#
# Disk-On-Chip Device Drivers
#
# CONFIG_MTD_DOC1000 is not set
# CONFIG_MTD_DOC2000 is not set
# CONFIG_MTD_DOC2001 is not set
# CONFIG_MTD_DOC2001PLUS is not set
# CONFIG_MTD_DOCPROBE is not set

#
# NAND Flash Device Drivers
#
# CONFIG_MTD_NAND is not set

#
# Parallel port support
#
# CONFIG_PARPORT is not set

#
# Block devices
#
# CONFIG_BLK_DEV_FD is not set
# CONFIG_BLK_DEV_XD is not set
# CONFIG_PARIDE is not set
# CONFIG_BLK_CPQ_DA is not set
# CONFIG_BLK_CPQ_CISS_DA is not set
# CONFIG_CISS_SCSI_TAPE is not set
# CONFIG_BLK_DEV_DAC960 is not set
# CONFIG_BLK_DEV_UMEM is not set
# CONFIG_BLK_DEV_LOOP is not set
# CONFIG_BLK_DEV_NBD is not set
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_SIZE=4096
# CONFIG_BLK_DEV_INITRD is not set
# CONFIG_BLK_DEV_RAMDISK_DATA is not set
# CONFIG_BLK_DEV_BLKMEM is not set
# CONFIG_BLK_STATS is not set

#
# Networking options
#
CONFIG_PACKET=y
# CONFIG_PACKET_MMAP is not set
# CONFIG_NETLINK_DEV is not set
# CONFIG_NETFILTER is not set
# CONFIG_FILTER is not set
CONFIG_UNIX=y
CONFIG_INET=y
# CONFIG_IP_MULTICAST is not set
# CONFIG_IP_ADVANCED_ROUTER is not set
# CONFIG_IP_PNP is not set
# CONFIG_NET_ARP_LIMIT is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE is not set
# CONFIG_ARPD is not set
# CONFIG_INET_ECN is not set
# CONFIG_SYN_COOKIES is not set
# CONFIG_IPV6 is not set
# CONFIG_KHTTPD is not set
# CONFIG_ATM is not set
# CONFIG_VLAN_8021Q is not set

#
#  
#
# CONFIG_IPX is not set
# CONFIG_ATALK is not set

#
# Appletalk devices
#
# CONFIG_DEV_APPLETALK is not set
# CONFIG_DECNET is not set
# CONFIG_BRIDGE is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_LLC is not set
# CONFIG_NET_DIVERT is not set
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set
# CONFIG_NET_FASTROUTE is not set
# CONFIG_NET_HW_FLOWCONTROL is not set

#
# QoS and/or fair queueing
#
# CONFIG_NET_SCHED is not set

#
# Network testing
#
# CONFIG_NET_PKTGEN is not set

#
# Network device support
#
# CONFIG_NETDEVICES is not set

#
# Amateur Radio support
#
# CONFIG_HAMRADIO is not set

#
# IrDA (infrared) support
#
# CONFIG_IRDA is not set

#
# ISDN subsystem
#
# CONFIG_ISDN is not set

#
# Character devices
#
# CONFIG_LEDMAN is not set
# CONFIG_DS1302 is not set
# CONFIG_VT is not set
# CONFIG_SERIAL is not set
# CONFIG_SERIAL_EXTENDED is not set
# CONFIG_SERIAL_NONSTANDARD is not set
# CONFIG_UNIX98_PTYS is not set

#
# I2C support
#
# CONFIG_I2C is not set

#
# Mice
#
# CONFIG_BUSMOUSE is not set
# CONFIG_MOUSE is not set

#
# Joysticks
#
# CONFIG_INPUT_GAMEPORT is not set
# CONFIG_INPUT_NS558 is not set
# CONFIG_INPUT_LIGHTNING is not set
# CONFIG_INPUT_PCIGAME is not set
# CONFIG_INPUT_CS461X is not set
# CONFIG_INPUT_EMU10K1 is not set
# CONFIG_INPUT_SERIO is not set
# CONFIG_INPUT_SERPORT is not set

#
# Joysticks
#
# CONFIG_INPUT_ANALOG is not set
# CONFIG_INPUT_A3D is not set
# CONFIG_INPUT_ADI is not set
# CONFIG_INPUT_COBRA is not set
# CONFIG_INPUT_GF2K is not set
# CONFIG_INPUT_GRIP is not set
# CONFIG_INPUT_INTERACT is not set
# CONFIG_INPUT_TMDC is not set
# CONFIG_INPUT_SIDEWINDER is not set
# CONFIG_INPUT_IFORCE_USB is not set
# CONFIG_INPUT_IFORCE_232 is not set
# CONFIG_INPUT_WARRIOR is not set
# CONFIG_INPUT_MAGELLAN is not set
# CONFIG_INPUT_SPACEORB is not set
# CONFIG_INPUT_SPACEBALL is not set
# CONFIG_INPUT_STINGER is not set
# CONFIG_INPUT_DB9 is not set
# CONFIG_INPUT_GAMECON is not set
# CONFIG_INPUT_TURBOGRAFX is not set
# CONFIG_QIC02_TAPE is not set
# CONFIG_IPMI_HANDLER is not set
# CONFIG_IPMI_PANIC_EVENT is not set
# CONFIG_IPMI_DEVICE_INTERFACE is not set
# CONFIG_IPMI_KCS is not set
# CONFIG_IPMI_WATCHDOG is not set

#
# Controller Area Network Cards/Chips
#
# CONFIG_CAN4LINUX is not set

#
# Watchdog Cards
#
# CONFIG_WATCHDOG is not set
# CONFIG_SCx200_GPIO is not set
# CONFIG_AMD_PM768 is not set
# CONFIG_NVRAM is not set
# CONFIG_RTC is not set
# CONFIG_DTLK is not set
# CONFIG_R3964 is not set
# CONFIG_APPLICOM is not set

#
# Ftape, the floppy tape device driver
#
# CONFIG_FTAPE is not set
# CONFIG_AGP is not set
# CONFIG_DRM is not set

#
# File systems
#
# CONFIG_QUOTA is not set
# CONFIG_QFMT_V2 is not set
# CONFIG_AUTOFS_FS is not set
# CONFIG_AUTOFS4_FS is not set
# CONFIG_REISERFS_FS is not set
# CONFIG_REISERFS_CHECK is not set
# CONFIG_REISERFS_PROC_INFO is not set
# CONFIG_ADFS_FS is not set
# CONFIG_ADFS_FS_RW is not set
# CONFIG_AFFS_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_HFSPLUS_FS is not set
# CONFIG_BEFS_FS is not set
# CONFIG_BEFS_DEBUG is not set
# CONFIG_BFS_FS is not set
# CONFIG_EXT3_FS is not set
# CONFIG_JBD is not set
# CONFIG_JBD_DEBUG is not set
# CONFIG_FAT_FS is not set
# CONFIG_MSDOS_FS is not set
# CONFIG_UMSDOS_FS is not set
# CONFIG_VFAT_FS is not set
# CONFIG_EFS_FS is not set
# CONFIG_JFFS_FS is not set
# CONFIG_JFFS2_FS is not set
# CONFIG_CRAMFS is not set
# CONFIG_TMPFS is not set
CONFIG_RAMFS=y
# CONFIG_ISO9660_FS is not set
# CONFIG_JOLIET is not set
# CONFIG_ZISOFS is not set
# CONFIG_JFS_FS is not set
# CONFIG_JFS_DEBUG is not set
# CONFIG_JFS_STATISTICS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_VXFS_FS is not set
# CONFIG_NTFS_FS is not set
# CONFIG_NTFS_RW is not set
# CONFIG_HPFS_FS is not set
CONFIG_PROC_FS=y
# CONFIG_DEVFS_FS is not set
# CONFIG_DEVFS_MOUNT is not set
# CONFIG_DEVFS_DEBUG is not set
# CONFIG_DEVPTS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_QNX4FS_RW is not set
CONFIG_ROMFS_FS=y
CONFIG_EXT2_FS=y
# CONFIG_SYSV_FS is not set
# CONFIG_UDF_FS is not set
# CONFIG_UDF_RW is not set
# CONFIG_UFS_FS is not set
# CONFIG_UFS_FS_WRITE is not set

#
# Network File Systems
#
# CONFIG_CODA_FS is not set
# CONFIG_INTERMEZZO_FS is not set
CONFIG_NFS_FS=y
CONFIG_NFS_V3=y
# CONFIG_NFS_DIRECTIO is not set
# CONFIG_ROOT_NFS is not set
# CONFIG_NFSD is not set
# CONFIG_NFSD_V3 is not set
# CONFIG_NFSD_TCP is not set
CONFIG_SUNRPC=y
CONFIG_LOCKD=y
CONFIG_LOCKD_V4=y
# CONFIG_SMB_FS is not set
# CONFIG_NCP_FS is not set
# CONFIG_NCPFS_PACKET_SIGNING is not set
# CONFIG_NCPFS_IOCTL_LOCKING is not set
# CONFIG_NCPFS_STRONG is not set
# CONFIG_NCPFS_NFS_NS is not set
# CONFIG_NCPFS_OS2_NS is not set
# CONFIG_NCPFS_SMALLDOS is not set
# CONFIG_NCPFS_NLS is not set
# CONFIG_NCPFS_EXTRAS is not set
# CONFIG_ZISOFS_FS is not set

#
# Partition Types
#
# CONFIG_PARTITION_ADVANCED is not set
# CONFIG_SMB_NLS is not set
# CONFIG_NLS is not set

#
# Sound
#
# CONFIG_SOUND is not set

#
# USB support
#
# CONFIG_USB is not set

#
# Kernel hacking
#
CONFIG_FULLDEBUG=y
# CONFIG_MAGIC_SYSRQ is not set
# CONFIG_PROFILE is not set
# CONFIG_NO_KERNEL_MSG is not set

#
# Cryptographic options
#
# CONFIG_CRYPTO is not set

#
# Library routines
#
# CONFIG_CRC32 is not set
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=y