October 2003 - ixp1200 - lists.cs.princeton.edu

How do I get IXP EB's ethernet address?
by 조준우 16 Oct '03

16 Oct '03

Hello. I use IXP1200 Evaluation board. I want to know ethrenet(MAC) address of port0. How do I get that ethernet address? Thanks.

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How to signal from Pentium to IXP EB?
by 조준우 14 Oct '03

14 Oct '03

Hello. I use IXP1200 EB attached(on PCI slot) to Pentium PC. How can I signal from Pentium PC to MICROENGINE in IXP EB? I searched VERA code to find the method. But I failed to find until now. Is there a good method? Like using some register or using interrupt? I think "polling" method now. Namely, PC writes a flag into SDRAM or SRAM region and MicroEngine check that flag continually. But I think that interrupt is more polished method. ^^ Plz give me any method about signalling from PC to IXP EB. Peformance is most important for my application. Thanks!

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How to signal from Pentium to IXP EB?
by 조준우 13 Oct '03

13 Oct '03

Hello. I use IXP1200 EB attached(on PCI slot) to Pentium PC. How can I signal Pentium PC to MICROENGINE in IXP EB? I searched VERA code to find the method. But I failed until now. Is there a good method? Like using some register or using interrupt? I think "polling" method now. Namely, writing to SDRAM or SRAM region and check that region continually. But I think that interrupt is more polished method. ^^ Anyway plz give me answer. Peformance is most important for my application. Thanks

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configure IXF440 ports
by tstevens 10 Oct '03

10 Oct '03

Hi, In order to investigate the packet loss issue on our ENP-2505 board, we would like to know how we can set the IXF440 ports fixed, thus turning off the autonegotiation. Does anyone know how to configure these (4) ports? Thank you in advance. Kind regards, Tim

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Whered do I get microcode assember?
by 조준우 07 Oct '03

07 Oct '03

Hello Until now, I only use StrongARM on IXP machine. Now, I want to use MicroEngines... But I don't find Microcode assember. I use IXP1200 Evaluation board and have SW development kit CDs. Whered do I get in-line microcode assember? 'In-line' means that assember operates at Linux machine. From SDK CD? or internet? Please answer anything about microcode assember, thanks!

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Where do I get microcode assembler?
by 조준우 07 Oct '03

07 Oct '03

Hello Until now, I only use StrongARM on IXP machine. Now, I want to use MicroEngines... But I don't find Microcode assember. I use IXP1200 Evaluation board and have SW development kit CDs. Whered do I get in-line microcode assember? 'In-line' means that assember operates at Linux machine. Please answer.. thanks!

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DMA transfers to host?
by Øyvind Hvamstad 06 Oct '03

06 Oct '03

Hi. I would like to know how to send data from the ENP-2505s sdram to the host disk. I read from the archive that it is possible to communicate between different pci devices, but I need more information on the subject. What exactly does the pci_dma instruction do? Can I use this to send data to the host? How can I fetch data from the host? -- Øyvind Hvamstad <oyvindh(a)ifi.uio.no>

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packet loss on IXF440 ports
by Koert Vlaeminck 06 Oct '03

06 Oct '03

Hi, Recently, we configured a Radisys ENP-2505 Intel IXP1200 evaluation board (revision C0) running the linux kernel (2.3.99) provided by the Intel IXA SDK. When trying to run the example count application from the Intel IXA SDK 2.01, we noticed the following problems: 1/ when using a 10 mbit hub between the IXF440 ports and the traffic generator (linux host), no data is received in the ENP-2505. Seems like the 10/100 mbit half-/full-duplex autonegotiation does not work properly (10mbit link LED is lit however). 2/ when using a crossover cable between the traffic generator and one of the ports of the ENP-2505 (thus 100 mbit full-duplex), the application seems to work (on that one port of course), but we notice a packet loss (about 20%). The cable is tested between two regular PCs and is fine. Generating packets with ping (without parameters) or with ping -f (more intensive) does not influence the packet loss rate, so sending one or hundred packets each second does not seem to matter. The same problem is encountered with the more advanced examples such as the L3-forwarder, which makes me think the IXA SDK provided Ingress ACEs are not suitable for the ENP boards. Has anyone encountered (and solved) one of these problems? Any help would be greatly appreciated. Kind regards, Tim & Koert

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Re: [ixp1200] WWBump Code in 'Network System Design'
by Shyamal Pandya 04 Oct '03

04 Oct '03

Hi Lim, I don't have this book but let me give it a shot. >1. alu[dpoff, dpoff, +, 16] ; Add Ether+TCP offsets >2. Buf_GetData[base, dl_buffer_handle] ; Get buffer base address >3. DL_GetBufferOffset[boff] ; Get data offset in buf. >4. alu[boff, boff, +, dpoff] ; Compute byte address >5. alu_shf[boff, --, B, boff, >>3] ; Convert to Q-Word addr. >6. sdram[read, $$hdr0, base, boff, 1], ctx_swap ; Read 8 bytes > >Assume the packet reach at the IX_Bus interface. [This is a big >assumption... and is it correct? If not, when dispatch loop runs the WWBump >macro, the entire packet is currently in SDRAM? ] >From the above code it is pretty clear that the packet is already in the SDRAM. There should be code somewhere that handles packet reception and transfer from port --> rfifo --> SDRAM. Since it is pretty generic it should be provided at one place and then not repeated. The dispatch loop must call the Ingress macro which performs the packet reception before it will call the WWBump macro. > >Line 2 get the SDRAM base address for the xfer reg to copy packet data >into. > >Line 3 get the packet offset currently located in buffer (rfifo? SDRAM?), >and i wonder how, by this command, the rfifo (SDRAM?) will know which is >the correct current packet offset to return, amongst so many packets >resided in rfifo (SDRAM?). > The dl_buffer_handle is the buffer handle for one particular packet, and it is set some where before the above code, probably by Ingress. You will have to look at the dispatch loop and follow the macros to understand. The SDRAM doesn't return anything, the offset is calculated by your code that puts the data in the SDRAM in the first place. Look at the code for dispatch loop macros for a better idea. >Assume IP header = 20 bytes, dpoff = 36 bytes. >Line 4 & 5 calculate dpoff and convert to quadword. In this context, SDRAM >should read from 32 - 39 bytes. But, how does the SDRAM knows to read from >32 bytes, instead of 36 bytes?? Is there an internal mechanism to convert?? > Line 5 converts the boff to a quadword, by dividing it by 8 (>>3). So a value of 36 will turn into 4 after line 5. The 4th quadword starts with byte 32. Again, it is your code that is doing the conversion, and no internal mechanism. >Line 6, this line, make me confuse, i assume, this line actually read >packet data from SDRAM into transfer register, where the packet data >offset, is at base+boff. So, the previous assumption --> data is in rfifo >is wrong. Then, which part of the code in WWBump, where microengine >instructs IX-Bus to transfer packet into SDRAM?? > If WWBump doesn't have the code, I guess there is some code (probably EthernetIngress) that does the stuff. Look at the dispatch loop to see what is called before WWBump. That's what I can assume, someone who has the book will be able to shed more light on the code. -- Shyamal Pandya Addr: 920 S Terrace Rd #102 Tempe AZ 85281 Phone: 1-480-966-1982 _________________________________________________________________ Share your photos without swamping your Inbox. Get Hotmail Extra Storage today! http://join.msn.com/?PAGE=features/es

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Debugging code running on hardware using developers workbench
by Craig Wampler 04 Oct '03

04 Oct '03

Hi - I was wondering if anyone has successfully used Developer Workbench to debug the ixp hardware (breakpoints, memory watch, etc) running linux. I've looked for a while, but the documentation from the developer's workbench doesn't really tell you what to do if it doesn't work, or how exactly it is supposed to work. If you have gotten it to work, or think that you know how, could you send me detailed directions or point me to some detailed directions. I have tried connecting by putting in the ip address (and I tried dns host name too) of the host that contains the IXP card into the Workbench's hardware options (and I selected to connect over ethernet). I tried it both from several hops away, and from the same switch the IXP is on. When I was on the same switch, I tried connecting both the the computer the IXP card is in, and the IP address who's ARP entry sends packets to the IXP card. Neither works. Our host machine and the StrongARM on the IXP are both running Linux. The machine I'm trying to connect from is running windows XP. If it's not possible to connect over ethernet, does anyone know of a way to connect Developers Workbench to the IXP card using a serial cable, if the card isn't running VxWorks? Thanks in advance, Craig Wampler CS Undergrad GA Tech

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