[coreboot] !! Resource didn't fit !! / Porting coreboot to the Supermicro X9SPU-F mainboard

[Renze Nicolai]

Hello everyone,

A small update: The serial port (finally) works! (apparently a kconfig
entry was needed for the superio code to actually enable the serial
port when it is enabled in code)

However the actual problem still remains:
The bootlog reports that something is wrong with the PCI(e) resources
and when the pci resources are being enabled the boot stops.

Bootlog can be found here:
https://github.com/rnplus/coreboot-dev-supermicro-x9spu-f/blob/master/i
nfo/bootlog

The board code as it is now can be found here:
https://github.com/rnplus/coreboot-dev-supermicro-x9spu-f/tree/master/c
oreboot-x9spu-f/src/mainboard/supermicro/x9spu-f

What controls the pci resources? And where could the problem be?

Also I don't understand where the "subsystemid" values in the device
tree come from and what they are used for. If someone could explain
that to me it would help as well.

Greetings,
Renze Nicolai



On Sat, 2017-01-14 at 21:31 +0100, Renze Nicolai wrote:
> Hello everyone,
> 
> I am trying to port coreboot to the Supermicro X9SPU-F mainboard,
> starting with the code for the ga-b75m-d3v mainboard (which is also
> based on the Intel C216 chipset).
> 
> I've put the code here:
> https://github.com/rnplus/coreboot-dev-supermicro-x9spu-f/tree/master
> /c
> oreboot-x9spu-f/src/mainboard/supermicro/x9spu-f
> 
> And I've put all the information that might be needed here:
> https://github.com/rnplus/coreboot-dev-supermicro-x9spu-f/tree/master
> /i
> nfo
> 
> Including a bootlog extracted using the PC speaker:
> https://github.com/rnplus/coreboot-dev-supermicro-x9spu-f/blob/master
> /i
> nfo/bootlog
> 
> I did not get the serial ports to work yet. The mainboard has both a
> WPCM450 and a NCT6776F superio chip. I think the serial port on the
> back of the machine is connected to the NCT6776F chip, which is
> driven
> by the WPCM450.
> 
> If anyone knows what I did wrong with the superio chips please do
> tell
> me!
> 
> But the main problem is with the PCI express config: The board stops
> booting when it tries to enable the resources for PCI 00:1c.6
> 
> Earlier in the bootlog this message appears:
> 
> ----
> 
> Setting resources...
> DOMAIN: 0000 io: base:65 size:203a align:12 gran:0 limit:2f7
> !! Resource didn't fit !!
> aligned base 1000 size 1000 limit 2f7      
> 1fff needs to be <= 2f7 (limit)
> PCI: 00:1c.6 1c *  [0x0 - 0xfff] io      
> PCI: 00:1c.6 1c *  [0x0 - 0xfff] io
> !! Resource didn't fit !!
> aligned base 1000 size 1000 limit 2f7
> 1fff needs to be <= 2f7 (limit)
> PCI: 00:1c.7 1c *  [0x1000 - 0x1fff] io
> ...
> !! Resource didn't fit !!
> aligned base 1000 size 20 limit 2f7
> 101f needs to be <= 2f7 (limit)
> PCI: 05:00.0 18 *  [0x0 - 0x1f] io
> 
> ----
> 
> Where could these errors be coming from and how can I solve them?
> Did I make some kind of mistake in the devicetree.cb?
> 
> Also: where do the values used in the "subsystemid" lines in the
> devicetree come from?
> 
> 
> Thank you!
> 
> Greetings,
> Renze Nicolai
>