Questions about porting 3.3 on 875P

From: Alexandre H <openbsdah(at)wanadoo.fr>
Date: Thu May 29 2003 - 14:47:39 EDT

Questions about porting 3.3 on 875P (ICH5, 82547)

Before the questions you need a brief explanation : I have bought a motherboard for using OpenBSD 3.3, an IC7-G with the chipset 875P (integrating ICH5 & intel network 82547) for my personnal usage.
But, i know well before, the ICH5 and the 82547 is not apparently supported actually.
Before buying the mobo i have read the doc of the ICH4 and ICH5 (intel website). In fact, there are 3 main diffs : ICH5 have one more USB UHCI, SATA support and RAID0 IDE (for ICH5R uniquely). If you want to know more, download the datasheet 25251601.pdf here http://www.intel.com/design/chipsets/datashts/252516.htm and download the PRM 29860004.pdf :
http://www.intel.com/design/chipsets/manuals/298600.htm

For testing i have changed, in /usr/src/sys/dev/pci/pcidevs.h, the id of the 82801DB for having the LPC (0x24d0), IDE (0x24db), SMBUS (0x24d3) , USB (0x24d2, 0x24d4, 0x24d7, 0x24dd) and AC97 (0x24d5). And now the IDE and AC97 seem working correctly, i have not tested the USB but i think it will work too (test soon). So for IDE and AC97 it semms that there is no diff between ICH4 and ICH5 (the ICH5 inherit from the ICH4). For the moment i am happy with this (IDE OK, sound OK, USB normaly OK but test soon).

Now i need the network with the 82547.
You must know that the 82547 is not connected with the ICH5 but directly with the MCH through the CSA bus so there are no direct link with the ICH5 (it's "like" the AGP). The benefit is less burden on PCI and CPU and having full duplex with gigabit (all idem for other speed). Don't be afraid, luckily, according to intel, this bus is invisible from the OS and the 82547 is accessible like other pci devices, read this intel.com/design/network/products/lan/controllers/82547ei.htm Note the name with other doc : 82547EI and 82547 are synonym.

I have found the last drivers for freebsd here : http://downloadfinder.intel.com/scripts-df/Detail_Desc.asp?strState=LIVE &PrdMap=prd838&DwnldID=5603&agr=Y
You must know two importants things about this sources : Don't be afraid when you read the README, the 82547 is supported, look the source. If you look the source you well see that it supports the 82541 too !
But it doesn't compile, i think that we can't use it directly with OpenBSD, for exemple the file bsd.mod.mk is missing but we can add net/ehternet.h (in the FreeBSD-current) because it has no dependancie with other file.
If i put the source in sys/dev/pci make depend doesn't find

net/ethernet.h
sys/bus.h
sys/rman.h

machine/resource.h
vm/vm.h
vm/pmap.h
machine/clock.h
pci/pcivar.h
pci/pcireg.h
opt_bdg.h
I try to resolve this dependancies but i don't succeed, i spend too many time for this "little" problem and i now i don't have the time to continue. I try to put the source in dev/em like freebsd but it change nothing. It's a pity to have the driver, to be near the success and fail for a probleme like this ! I am skilled in C but i am not a permanent OS developper, just occasional in the past.

Now the questions :
0] Somebody have made something with the ICFH5 or the 82547 ? Yes i know, i shall have ask before, i am perfectly aware for all the drawbacks, i know too much.

1. Somebody can adapte the 82547 driver (and implicitly 82541) ? If yes and if you succeed the compilation, send me the sources i will test it.
2. What is the tool for editing pcidevs.h and pcidevs_data.h ?

This task will be a good thing for OpenBSD 3.3 because it will work with the 865 too, it has the ICH5 and optionaly the 82547. For a "little" effort OpenBSD can support the last ICH and two new gigabit ethernet controllers !

Thanks. Received on Thu May 29 12:57:31 2003