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Commit 4c6e052a authored by Aaron Durbin's avatar Aaron Durbin Committed by Andi Kleen
Browse files

[PATCH] MMCONFIG and new Intel motherboards 



On Sat, Sep 09, 2006 at 04:14:29PM +0200, Andi Kleen wrote:
> [patch] Looks reasonable, but probably not for 2.6.18 because this stuff
> is already too fragile and it is probably too risky to do any big changes now
> since not enough testing time is left. Can you please resubmit
> it with proper description and signed-off-by line? I can queue it for .19 then
>
> -Andi

Patch inserts PCI memory mapped config region(s) into the resource map.  This
will allow for the MMCCONFIG regions to be marked as busy in the iomem
address space as well as the regions(s) showing up in /proc/iomem.

Signed-off-by: default avatarAaron Durbin <adurbin@google.com>
Signed-off-by: default avatarAndi Kleen <ak@suse.de>
parent 56dd669a

arch/x86_64/pci/mmconfig.c

+32 −0
Original line number Diff line number Diff line
@@ -163,6 +163,37 @@ static __init void unreachable_devices(void) 
	}

}



static __init void pci_mmcfg_insert_resources(void)

{

#define PCI_MMCFG_RESOURCE_NAME_LEN 19

	int i;

	struct resource *res;

	char *names;

	unsigned num_buses;



	res = kcalloc(PCI_MMCFG_RESOURCE_NAME_LEN + sizeof(*res),

			pci_mmcfg_config_num, GFP_KERNEL);



	if (!res) {

		printk(KERN_ERR "PCI: Unable to allocate MMCONFIG resources\n");

		return;

	}



	names = (void *)&res[pci_mmcfg_config_num];

	for (i = 0; i < pci_mmcfg_config_num; i++, res++) {

		num_buses = pci_mmcfg_config[i].end_bus_number -

		    pci_mmcfg_config[i].start_bus_number + 1;

		res->name = names;

		snprintf(names, PCI_MMCFG_RESOURCE_NAME_LEN, "PCI MMCONFIG %u",

			pci_mmcfg_config[i].pci_segment_group_number);

		res->start = pci_mmcfg_config[i].base_address;

		res->end = res->start + (num_buses << 20) - 1;

		res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;

		insert_resource(&iomem_resource, res);

		names += PCI_MMCFG_RESOURCE_NAME_LEN;

	}

}



void __init pci_mmcfg_init(int type)

{

	int i;
@@ -206,6 +237,7 @@ void __init pci_mmcfg_init(int type) 
	}



	unreachable_devices();

	pci_mmcfg_insert_resources();



	raw_pci_ops = &pci_mmcfg;

	pci_probe = (pci_probe & ~PCI_PROBE_MASK) | PCI_PROBE_MMCONF;