From: Andi Kleen <ak@suse.de>
Date: Tue, 26 Sep 2006 08:52:40 +0000 (+0200)
Subject: [PATCH] i386: Add MMCFG resources to i386 too
X-Git-Tag: firefly_0821_release~33451^2~21
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=de09bddb9d6f96785be470c832b881e6d72d589f;p=firefly-linux-kernel-4.4.55.git

[PATCH] i386: Add MMCFG resources to i386 too

Following earlier x86-64 patch

Cc: gregkh@suse.de

Signed-off-by: Andi Kleen <ak@suse.de>
---

diff --git a/arch/i386/pci/mmconfig.c b/arch/i386/pci/mmconfig.c
index 2c4f585510c9..05be8db58a8c 100644
--- a/arch/i386/pci/mmconfig.c
+++ b/arch/i386/pci/mmconfig.c
@@ -151,6 +151,38 @@ static struct pci_raw_ops pci_mmcfg = {
 	.write =	pci_mmcfg_write,
 };
 
+
+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;
+	}
+}
+
 /* K8 systems have some devices (typically in the builtin northbridge)
    that are only accessible using type1
    Normally this can be expressed in the MCFG by not listing them
@@ -187,6 +219,8 @@ static __init void unreachable_devices(void)
 	}
 }
 
+
+
 void __init pci_mmcfg_init(int type)
 {
 	if ((pci_probe & PCI_PROBE_MMCONF) == 0)
@@ -214,4 +248,5 @@ void __init pci_mmcfg_init(int type)
 	pci_probe = (pci_probe & ~PCI_PROBE_MASK) | PCI_PROBE_MMCONF;
 
 	unreachable_devices();
+	pci_mmcfg_insert_resources();
 }