xilinx Ml405 NFS mount problem

Wed Apr 2 07:42:57 EST 2008

Dear Robert and all friends,

A little more progress on my problem. I just found that if I disable the hardware check-sum offloading options, the root file system could be mounted then. In combination with the previous information of "UDP bad checksum" I mentioned, it seems that you are absolutely right! The problem is on the hardware checksum logic!

For this problem, maybe it will be better if xilinx could solve it. I am not pretty sure if we can rely on a stricter timing constraint. After all, we are not the original designer of the LL_TEMAC control logic. 

Any other idea or suggestion? Thanks in advance.

BR
Ming
> Subject: RE: xilinx Ml405 NFS mount problem> From: rwoodworth at securics.com> To: eemingliu at hotmail.com> CC: john.linn at xilinx.com; linuxppc-embedded at ozlabs.org> Date: Tue, 1 Apr 2008 10:50:18 -0600> > I think you may be suffering from the latest LL_TEMAC packet loss> problem. (NFS/UDP really does not like packet loss)> > > Let me guess. > You are using a base system from "Base System Builder Wizard"?> EDK 9.2i. Default syntheses/P&R options.> > I have seen a massive packet loss problems on my ML403 and two other> boards I have with an FX60.> > This is probably a hardware problem.> Xilinx has acknowledged an LL_TEMAC problem to me but has not provided a> fix. I have heard that things are better with EDK/ISE-10.1 but I have> not tested it.> > > The vendor of one of my boards (Pico) has fixed the problem on the FX60> by highly constraining the timing of the LL_TEMAC in map/PR. On my> ML403 I used similar constraints and it fixed the problem, but only if> the device is plugged into a GigE switch. The problem is still there> with the same .bit file on a 100-T switch. > > > Are you on a GigE switch?> > > > Rob.> > > > > > > On Tue, 2008-04-01 at 16:15 +0000, MingLiu wrote:> > Dear John,> > > > Thank you for your replying. > > > > >It’s not obvious to me what the problem is as I don’t see any driver> > failures. Have you >tried using a ramdisk and then seeing if the> > network is working before using NFS root? > > > > Not yet. I will try it soon. However from the information on the> > LL_TEMAC, it seems everything is fine and it should work. > > > > > > > > >And I’m assuming you have used the NFS root before so you know that> > it’s good for sure.> > > > > > > > >I test on the ML405 with NFS root and haven’t seen this problem, but> > my setup is a little different. I use DHCP rather than >a static IP,> > but other than that it’s similar.> > > > > > > > Yes. I used NFS before. I can make sure my NFS server works well. Also> > in principle, static IP should get a same result as DHCP, I think. > > > > > > > > >How long has it been since you pulled from the Xilinx Git tree?> > > > > > > > I just pulled the Xilinx tree quite recently. I am using a latest> > kernel.> > > > > > > > BR > > > > Ming> > > > > > > > > > > > And I’m assuming you have used the NFS root before so you know> > that it’s good for sure.> > > > > > > > I test on the ML405 with NFS root and haven’t seen this> > problem, but my setup is a little different. I use DHCP> > rather than a static IP, but other than that it’s similar.> > > > > > > > I’m assuming that you accidentally got 2 different powerup> > outputs in the message below as the 1st stops and a 2nd starts> > in the middle.> > > > > > > > How long has it been since you pulled from the Xilinx Git> > tree?> > > > > > > > Thanks,> > > > John> > > > > > > > > > ______________________________________________________________> > From: linuxppc-embedded-bounces> > +john.linn=xilinx.com at ozlabs.org> > [mailto:linuxppc-embedded-bounces> > +john.linn=xilinx.com at ozlabs.org] On Behalf Of MingLiu> > Sent: Tuesday, April 01, 2008 8:12 AM> > To: linuxppc-embedded at ozlabs.org> > Subject: xilinx Ml405 NFS mount problem> > > > > > > > > > Dear friends,> > > > I am bringing up my kernel from Xilinx git tree. Unfortunately I met some> > problem when mounting the root file system. Here is the information> > listed. I will appreciate a lot if someone can help me out of the trouble. > > Thanks a lot!> > > > > > loaded at: 00400000 0059F19C> > board data at: 0059D120 0059D19C> > relocated to: 004050C8 00405144> > zimage at: 00405F3F 0059C025> > avail ram: 005A0000 08000000> > > > Linux/PPC load: root=/dev/nfs> > ip=192.168.0.4:192.168.0.3:192.168.0.3:255.255.255.0 rw> > nfsroot=192.168.0.3:/home/mingliu/ml403_rootfs console=ttyUL0,38400> > mem=32M> > Uncompressing Linux...done.> > Now booting the kernel> > Linux version 2.6.24-rc8-xlnx-g1db182b8-dirty (mingliu at cca01) (gcc version> > 3.4.1) #7 Tue Apr 1 14:55:25 CEST 2008> > Xilinx Generic PowerPC board support package (Xilinx ML405) (Virtex-4 FX)> > Zone PFN ranges:> > DMA 0 -> 8192> > > > Normal 8192 -> 8192> > > > HighMem 8192 -> 8192> > Movable zone start PFN for each node> > early_node_map[1] active PFN ranges> > 0: 0 -> 8192> > Built 1 zonelists in Zone order, mobility grouping on. Total pages: 8128> > Kernel command line: root=/de v/nfs> > ip=192.168.0.4:192.168.0.3:192.168.0.3:255.255.255.0 rw> > nfsroot=192.168.0.3:/home/mingliu/ml403_rootfs console=ttyUL0,38400> > mem=32M> > Xilinx INTC #0 at 0x81800000 mapped to 0xFDFFF000> > PID hash table entries: 128 (order: 7, 512 bytes)> > Console: colour dummy device 80x25> > Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)> > Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)> > Memory: 28884k available (2552k kernel code, 944k data, 84k init, 0k highmem)> > SLUB: Genslabs=11, HWalign=32, Order=0-1, MinObjects=4, CPUs=1, Nodes=1> > Mount-cache hash table entries: 512> > net_namespace: 64 bytes> > NET: Registered protocol family 16> > Registering device uartlite:0> > Fixup MAC address for xilinx_lltemac:0> > Regis tering device xilinx_lltemac:0> > NET: Registered protocol family 2> > IP route cache hash table entries: 1024 (order: 0, 4096 bytes)> > TCP established hash table entries: 1024 (order: 1, 8192 bytes)> > TCP bind hash table entries: 1024 (order: 0, 4096 bytes)> > TCP: Hash tables configured (established 1024 bind 1024)> > TCP reno registered> > sysctl table check failed: /kernel/l2cr .1.31 Missing strategy> > Call Trace:> > [c1c0fe50] [c0008b70] show_stack+0x40/0x194 (unreliable)> > [c1c0fe90] [c003aed4] set_fail+0x68/0x80> > [c1c0feb0] [c003b4ec] sysctl_check_table+0x600/0x77c> > [c1c0fef0] [c003b4d4] sysctl_check_table+0x5e8/0x77c> > [c1c0ff30] [c002605c] register_sysctl_table+0x64/0xb4> > [c1c0ff50] [c034579c] register_ppc_htab_sysctl+0x18/0x2c> > [c1c0ff60] [c034482c] kernel_init+0x94/0x2bc> > [c1c0fff0] [c0004d58] kernel_thread+0x44/0x60> > Installing knfsd (copyright (C) 1996 okir at monad.swb.de).> > fuse init (API version 7.9)> > io scheduler noop registered> > io scheduler anticipatory registered> > io scheduler deadline registered> > io scheduler cfq registered (default)> > uartlite.0: ttyUL0 at MM IO 0x84000003 (irq = 3) is a uartlite> > console [ttyUL0] enabled> > loop: module loaded> > nbd: registered device at major 43> > xilinx_lltemac xilinx_lltemac.0: MAC address is now 0: a:35: 1: 2: 3> > xilinx_lltemac xilinx_lltemac.0: XLlTemac: using DMA mode.> > XLlTemac: Dma base address: phy: 0x84600100, virt: 0xc3008100> > XLlTemac: buffer descriptor size: 32768 (0x8000)> > XLlTemac: Allocating DMA descriptors with kmalloc<6>XLlTemac:> > (buffer_descriptor_init) phy: 0x1d18000, virt: 0xc1d18000, size: 0x8000> > XTemac: PHY detected at address 7.> > xilinx_lltemac xilinx_lltemac.0: eth0: Xilinx TEMAC at 0x81C00000 mapped> > to 0xC3004000, irq=2> > console [netcon0] enabled> > Linux version 2.6.24-rc8-xlnx-g1db182b8-dirty (mingliu at cca01) (gcc version> > 3.4.1) #7 Tue Apr 1 14:55:25 CEST 2008> > > > Xilinx Generic PowerPC board support package (Xilinx ML405)> > (Virtex-4 FX)> > > > Zone PFN ranges:> > DMA 0 -> 8192> > Normal 8192 -> 8192> > HighMem 8192 -> 8192> > Movable zone start PFN for each node> > early_node_map[1] active PFN range> > s> > 0: 0 -> 8192> > Built 1 zonelists in Zone order, mobility grouping on. Total pages: 8128> > Kernel command line: root=/dev/nfs> > ip=192.168.0.4:192.168.0.3:192.168.0.3:255.255.255.0 rw> > nfsroot=192.168.0.3:/home/mingliu/ml403_rootfs console=ttyUL0,38400> > mem=32M> > Xilinx INTC #0 at 0x81800000 mapped to 0xFDFFF000> > PID hash table entries: 128 (order: 7, 512 bytes)> > Console: colour dummy device 80x25> > Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)> > Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)> > Memory: 28884k available (2552k kernel code, 944k data, 84k init, 0k highmem)> > SLUB: Genslabs=11, HWalign=32, Order=0-1, MinObjects=4, CPUs=1, Nodes=1> > Mount-cache hash table entries: 512> > n> > et_namespace: 64 bytes> > NET: Registered protocol family 16> > Registering device uartlite:0> > Fixup MAC address for xilinx_lltemac:0> > Registering device xilinx_lltemac:0> > NET: Registered protocol family 2> > IP route cache hash table entries: 1024 (order: 0, 4096 bytes)> > TCP established hash table entries: 1024 (order: 1, 8192 bytes)> > TCP bind hash table entries: 1024> > (order: 0, 4096 bytes)> > TCP: Hash tables configured (established 1024 bind 1024)> > TCP reno registered> > sysctl table check failed: /kernel/l2cr .1.31 Missing strategy> > Call Trace:> > [c1c0fe50] [c0008b70] show_stack+0x40/0x194 (unreliable)> > [c1c0fe90] [c003aed4] set_fail+0x68/0x80> > [c1c0feb0] [c003b4ec] sysctl_check_table+0x600/0x77c> > [c1c0fef0] [c003b4d4] sysctl_c> > heck_table+0x5e8/0x77c> > [c1c0ff30] [c002605c] register_sysctl_table+0x64/0xb4> > [c1c0ff50] [c034579c] register_ppc_htab_sysctl+0x18/0x2c> > [c1c0ff60] [c034482c] kernel_init+0x94/0x2bc> > [c1c0fff0] [c0004d58] kernel_thread+0x44/0x60> > Installing knfsd (copyright (C) 1996 okir at monad.swb.de).> > fuse init (API version 7.9)> > io scheduler noop registered<> > /SPAN>> > io scheduler anticipatory registered> > io scheduler deadline registered> > io scheduler cfq registered (default)> > uartlite.0: ttyUL0 at MMIO 0x84000003 (irq = 3) is a uartlite> > console [ttyUL0] enabled> > loop: module loaded> > nbd: registered device at major 43> > xilinx_lltemac xilinx_lltemac.0: MAC address is now 0: a:35: 1: 2: 3> > xilinx_lltemac xilinx_lltemac.0: XLlTemac: using DMA mode.> > XLlTemac: Dma base address: phy: 0x84600100, virt: 0xc3008100> > XLlTemac: buffer descriptor size: 32768 (0x8000)> > XLlTemac: Allocating DMA descriptors with kmalloc<6>XLlTemac:> > (buffer_descriptor_init) phy: 0x1d18000, virt: 0xc1d18000, size: 0x8000> > XTemac: PHY detected at address 7.> > xilinx_lltemac xilinx_lltemac.0: eth0: Xilinx TEMAC at 0x81C00000 mapped> > <> > SPAN style="FONT-SIZE: 12pt">to 0xC3004000, irq=2> > console [netcon0] enabled> > netconsole: network logging started> > Generic platform RAM MTD, (c) 2004 Simtec Electronics> > mice: PS/2 mouse device common for all mice> > TCP cubic registered> > NET: Registered protocol family 1> > NET: Registered protocol family 17> > RPC: Registered udp transport module.> > RPC: Registered tcp transport module.> > eth0: XLlTemac: Options: 0x3fa> > eth0: XLlTemac: allocating interrupt 0 for dma mode tx.> > eth0: XLlTemac: allocating interrupt 1 for dma mode rx.> > eth0: XLlTemac: speed set to 1000Mb/s> > eth0: XLlTemac: Send Threshold = 24, Receive Threshold = 4> > eth0: XLlTemac: Send Wait bound = 254, Receive Wait bound = 254> > IP-Config: Complete:> > > > device=eth0, addr=192.168.0.4, mask=255.255.255.0, gw=192.168.0.3,> > host=192.168.0.4, domain=, nis-domain=(none),> > bootserver=192.168.0.3, rootserver=192.168.0.3, rootpath=> > Looking up port of RPC 100003/2 on 192.168.0.3> > rpcbind: server 192.168.0.3 not responding, timed out> > Root-NFS: Unable to get nfsd port number from server, using default> > Looking up port of RPC 10000> > 5/1 on 192.168.0.3> > rpcbind: server 192.168.0.3 not responding, timed out> > Root-NFS: Unable to get mountd port number from server, using default> > mount: server 192.168.0.3 not responding, timed out> > Root-NFS: Server returned error -5 while mounting /home/mingliu/ml403_rootfs> > VFS: Unable to mount root fs via NFS, trying floppy.> > VFS: Cannot open root device "nfs" or unknown-block(2,0)> > Please append a correct "root=" boot option; here are > > the available> > partitions:> > Kernel panic - not syncing: VFS: Unable to mount root fs on> > unknown-block(2,0)> > Rebooting in 180 seconds..> > > > > > BR> > Ming> > > > > > > > > > ______________________________________________________________> > Windows Live Writer，支持离线撰写博客内容，随时随地想写就写。> > 立即使用！> > > > > > > > > > ______________________________________________________________________> > 使用新一代 Windows Live Messenger 轻松交流和共享！ 立即体验！ > > _______________________________________________> > Linuxppc-embedded mailing list> > Linuxppc-embedded at ozlabs.org> > https://ozlabs.org/mailman/listinfo/linuxppc-embedded> 
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