Subject: Re: onboard pci ethernet controller(i82551)without eprom(linuxppc2.2.4 MPC5200)

From: Joshua Lamorie <[email-masked]>
Date: Wed, 02 Nov 2005 10:21:30 -0500

您好,

I am using the same chip connected through PCI to a Virtex-II Pro (PPC 
405).  I do not have an EEPROM connected to the chip.  However, I am 
having problem with the code because it seems to be built specifically 
for processors that have coherent cache.  So each time the code tries to 
execute I get a kernel panic. (kernel 2.4.26, with RTAI patch)

This occurs because in many places it executes a bottom-half spin lock 
before calling pci_free_consistent.  This increments the bottom-half 
counter and so when pci_free_consistent is called it calls BUG(); and 
the whole thing goes Tango Uniform.  I'm about to go through and try to 
fix this, but it seems like an extremely dangerous thing for me to play 
with.

I seem to be able to get the eepro100.c code to work, but I was hoping 
to use the e100 driver to program an EEPROM on the board.

谢谢

Joshua

ÏÄÓê wrote:

>After i modified e100_init() in e100_main.c , the pci ethernet card could been found :
>
>bash-2.05b# ifconfig -a
>eth0      Link encap:Ethernet  HWaddr FF:FF:FF:FF:FF:FF
>          BROADCAST MULTICAST  MTU:1500  Metric:1
>          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
>          collisions:0 txqueuelen:1000
>          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
>          Memory:40000000-40000038
>
>eth1      Link encap:Ethernet  HWaddr 00:04:9F:00:15:2B
>          inet addr:198.87.102.215  Bcast:198.87.102.255  Mask:255.255.255.0
>          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>          RX packets:12606 errors:42 dropped:0 overruns:0 frame:0
>          TX packets:7668 errors:3 dropped:0 overruns:3 carrier:0
>          collisions:0 txqueuelen:1000
>          RX bytes:10596597 (10.1 Mb)  TX bytes:1218624 (1.1 Mb)
>          Interrupt:43
>
>lo        Link encap:Local Loopback
>          inet addr:127.0.0.1  Mask:255.0.0.0
>          UP LOOPBACK RUNNING  MTU:16436  Metric:1
>          RX packets:4 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
>          collisions:0 txqueuelen:0
>
>But i still could not config eth0:
>
>bash-2.05b# ifconfig eth0 198.87.102.140
>SIOCSIFFLAGS: Resource temporarily unavailable
>
>I noticed that there was message as blow during kernel bootup:
>
>POSIX conformance testing by UNIFIX
>PCI: Probing PCI hardware
>PCI: Cannot allocate resource region 0 of device 00:1a.0
>Linux NET4.0 for Linux 2.4
>
>Intel(R) PRO/100 Network Driver - version 2.3.38-k1
>Copyright (c) 2004 Intel Corporation
>
>PCI: Enabling device 00:18.0 (0006 -> 0007)
>e100: eth0: Intel(R) PRO/100 Network Connection
>Hardware receive checksums enabled
>
>IP-Config: Failed to open eth0
>
>what is wrong?
>
>Best regards
>
>Xiayu
>
>
>
>
>
>
>
>_______________________________________________
>Linuxppc-embedded mailing list
>[email-masked]
>https://ozlabs.org/mailman/listinfo/linuxppc-embedded
>
>  
>

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