Re: Xorg panics the system (radeondrm) on startup: 5.0_RC3

[Rafal Boni <rafal%pobox.com@localhost>]

On Mon, Apr 13, 2009 at 12:49:27PM +0100, Hugo Silva wrote:
> Hi list,
> 
> I'm seeing a panic while starting Xorg:
> 
> 
> uname:
> NetBSD laptop 5.0_RC3 NetBSD 5.0_RC3 (LAPTOP-20090409) #1: Fri Apr 10 
> 13:16:18 WEST 2009  root@laptop:/usr/obj/sys/arch/i386/compile/LAPTOP i386
> 
> selected dmesg:
> agp0 at pchb0: can't find internal VGA device config space
> (...)
> radeondrm0 at vga0: ATI Radeon RV350 Mobility 9600 M10 NP (unit 0)

I think our DRM code has trouble with non-intel graphics cards attached
behind intel AGP bridges.  There's a bit of code in sys/dev/pci/agp_i810.c
that looks like the following:

        if (pci_find_device(&isc->vga_pa, agp_i810_vgamatch) == 0) {
#if NAGP_INTEL > 0
                const struct pci_attach_args *pa = aux;

                switch (PCI_PRODUCT(pa->pa_id)) {
                case PCI_PRODUCT_INTEL_82840_HB:
                case PCI_PRODUCT_INTEL_82865_HB:
                case PCI_PRODUCT_INTEL_82845G_DRAM:
                case PCI_PRODUCT_INTEL_82815_FULL_HUB:
                        return agp_intel_attach(parent, self, aux);
                }
#endif
                aprint_error(": can't find internal VGA device config space\n");
                free(isc, M_AGP);
                return ENOENT;
        }

I suspect you want to end up calling agp_intel_attach() vs. falling into
the default case, but that might require adding knowledge of newer Intel
AGP host interfaces in agp_intel.c.  That'a about all I know about it :)

It might be as easy as adding a case for the PCI ID of your AGP host 
interface (I assume this is pcbh0 in your case) to the above case, or it
 might require work in agp_intel.c as well.

> [drm:pid0:radeon_driver_load] AGP card detected
> [drm:pid0:drm_agp_init] agp_available = 1
> radeondrm0: AGP at 0x00000000 0MB
> [drm:pid0:drm_mtrr_add] offset=0 size=0

Yeah, this looks like it's unhappy... 0MB at address 0.. hmmm.

--rafal

-- 
  Time is an illusion; lunchtime, doubly so.     |/\/\|           Rafal Boni
                   -- Ford Prefect               |\/\/|      
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