[PATCH] MMCONFIG and new Intel motherboards (4c6e052a) · Commits · 戴 / test

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:

Aaron Durbin <adurbin@google.com> Signed-off-by:

Andi Kleen <ak@suse.de>

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;

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