[ixp1200] peth driver question, need help

[huangtao]

I have always start the microengine,   I can ping to another ip address, but if the speed is a litter high, peth will drop 
some packet. this error is occured below:

in the peth_start_xmit function of source file peth.c
     ....
    /* Get a new descriptor where we can write the packet data */
    sram_pop(freelist, &descriptor);
    descriptor = PETH_DESC_CORETOUENG(descriptor);     ------> this descriptor is 0
     ....
    PETH_DESC_POSTPOP(descriptor);

    /* Sanity check */
    if (!PETH_VALID_DESCRIPTOR(descriptor)) {
      logMsg("Bad descriptor %x, dropping outgoing packet\n", descriptor);    -----> so have a error message
      pethFreeDescriptor(freelist, descriptor);
      goto errorAndCleanTXD;                      ---->xmit packet is droped
    }
     ....

who can help me pls.

Best Regard

----- Original Message ----- 
From: "Jimmy Brian Christanthio" <jimmy at soft-v.com>
To: <ixp1200 at CS.Princeton.EDU>
Sent: Monday, February 17, 2003 1:55 PM
Subject: RE: [ixp1200] peth driver question, need help


> We are using Embedded Linux tools and Peth from Viosoft Corp. We have no
> problems running PETH and applications utilising the PETH. If you would
> like more information, you could contact Viosoft or their distributors. 
> 
> 1. Did you start your microengine?
> 
> 2. If yes, check status, usually it is fault in microengine. 
> 
> Let me know if you need further information. 
> 
> -----Original Message-----
> From: owner-ixp1200 at CS.Princeton.EDU
> [mailto:owner-ixp1200 at CS.Princeton.EDU] On Behalf Of huangtao
> Sent: Saturday, February 15, 2003 11:34 AM
> To: ixp1200 at CS.Princeton.EDU
> Subject: [ixp1200] peth driver question, need help
> 
> 
> I use peth driver with ixp1200, and meet this error message. 
> this error will drop some output packet occasionally, who will tell 
> me what is happend, thanks very much
> 
> this error is below:
> 
> $ insmod ue.o
> $ insmod octmac.o
> $ insmod giga_drv.o
> $ rs_udebug
> $ load
> $ ping 1.2.1.1
> 
> then I meet the error message like that:
> 
> peth_start_xmit called
> peth_start_xmit: new descriptor = 0
> Bad descriptor 0, dropping outgoing packet
> pethFreeDescriptor: descriptor = 0
> pethFreeDescriptor: Bad descriptor 0
> 
> 
> Best Regard 
> 
>