Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6

* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6: (28 commits)
  PCI: make arch/i386/pci/common.c:pci_bf_sort static
  PCI: ibmphp_pci.c: fix NULL dereference
  pciehp: remove unnecessary pci_disable_msi
  pciehp: remove unnecessary free_irq
  PCI: rpaphp: change device tree examination
  PCI: Change memory allocation for acpiphp slots
  i2c-i801: SMBus patch for Intel ICH9
  PCI: irq: irq and pci_ids patch for Intel ICH9
  PCI: pci_{enable,disable}_device() nestable ports
  PCI: switch pci_{enable,disable}_device() to be nestable
  PCI: arch/i386/kernel/pci-dma.c: ioremap balanced with iounmap
  pci/i386: style cleanups
  PCI: Block on access to temporarily unavailable pci device
  pci: fix __pci_register_driver error handling
  pci: clear osc support flags if no _OSC method
  acpiphp: fix missing acpiphp_glue_exit()
  acpiphp: fix use of list_for_each macro
  Altix: Initial ACPI support - ROM shadowing.
  Altix: SN ACPI hotplug support.
  Altix: Add initial ACPI IO support
  ...

54 files changed, 1400 insertions, 959 deletions

diff --git a/arch/i386/kernel/pci-dma.c b/arch/i386/kernel/pci-dma.c
index 25fe6685393..5c8c6ef1fc5 100644
--- a/arch/i386/kernel/pci-dma.c
+++ b/arch/i386/kernel/pci-dma.c
@@ -75,7 +75,7 @@ EXPORT_SYMBOL(dma_free_coherent);
 int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
 				dma_addr_t device_addr, size_t size, int flags)
 {
-	void __iomem *mem_base;
+	void __iomem *mem_base = NULL;
 	int pages = size >> PAGE_SHIFT;
 	int bitmap_size = (pages + 31)/32;
 
@@ -114,6 +114,8 @@ int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
  free1_out:
 	kfree(dev->dma_mem->bitmap);
  out:
+	if (mem_base)
+		iounmap(mem_base);
 	return 0;
 }
 EXPORT_SYMBOL(dma_declare_coherent_memory);
diff --git a/arch/i386/pci/common.c b/arch/i386/pci/common.c
index cdfcf971098..53ca6e89798 100644
--- a/arch/i386/pci/common.c
+++ b/arch/i386/pci/common.c
@@ -20,7 +20,7 @@
 unsigned int pci_probe = PCI_PROBE_BIOS | PCI_PROBE_CONF1 | PCI_PROBE_CONF2 |
 				PCI_PROBE_MMCONF;
 
-int pci_bf_sort;
+static int pci_bf_sort;
 int pci_routeirq;
 int pcibios_last_bus = -1;
 unsigned long pirq_table_addr;
diff --git a/arch/i386/pci/fixup.c b/arch/i386/pci/fixup.c
index c1949ff38d6..cde1170b01a 100644
--- a/arch/i386/pci/fixup.c
+++ b/arch/i386/pci/fixup.c
@@ -74,52 +74,6 @@ static void __devinit  pci_fixup_ncr53c810(struct pci_dev *d)
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C810, pci_fixup_ncr53c810);
 
-static void __devinit pci_fixup_ide_bases(struct pci_dev *d)
-{
-	int i;
-
-	/*
-	 * PCI IDE controllers use non-standard I/O port decoding, respect it.
-	 */
-	if ((d->class >> 8) != PCI_CLASS_STORAGE_IDE)
-		return;
-	DBG("PCI: IDE base address fixup for %s\n", pci_name(d));
-	for(i=0; i<4; i++) {
-		struct resource *r = &d->resource[i];
-		if ((r->start & ~0x80) == 0x374) {
-			r->start |= 2;
-			r->end = r->start;
-		}
-	}
-}
-DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pci_fixup_ide_bases);
-
-static void __devinit  pci_fixup_ide_trash(struct pci_dev *d)
-{
-	int i;
-
-	/*
-	 * Runs the fixup only for the first IDE controller
-	 * (Shai Fultheim - shai@ftcon.com)
-	 */
-	static int called = 0;
-	if (called)
-		return;
-	called = 1;
-
-	/*
-	 * There exist PCI IDE controllers which have utter garbage
-	 * in first four base registers. Ignore that.
-	 */
-	DBG("PCI: IDE base address trash cleared for %s\n", pci_name(d));
-	for(i=0; i<4; i++)
-		d->resource[i].start = d->resource[i].end = d->resource[i].flags = 0;
-}
-DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5513, pci_fixup_ide_trash);
-DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_10, pci_fixup_ide_trash);
-DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_11, pci_fixup_ide_trash);
-DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_9, pci_fixup_ide_trash);
-
 static void __devinit  pci_fixup_latency(struct pci_dev *d)
 {
 	/*
diff --git a/arch/i386/pci/i386.c b/arch/i386/pci/i386.c
index 98580292f0d..43005f04442 100644
--- a/arch/i386/pci/i386.c
+++ b/arch/i386/pci/i386.c
@@ -104,16 +104,24 @@ static void __init pcibios_allocate_bus_resources(struct list_head *bus_list)
 	/* Depth-First Search on bus tree */
 	list_for_each_entry(bus, bus_list, node) {
 		if ((dev = bus->self)) {
-			for (idx = PCI_BRIDGE_RESOURCES; idx < PCI_NUM_RESOURCES; idx++) {
+			for (idx = PCI_BRIDGE_RESOURCES;
+			    idx < PCI_NUM_RESOURCES; idx++) {
 				r = &dev->resource[idx];
 				if (!r->flags)
 					continue;
 				pr = pci_find_parent_resource(dev, r);
-				if (!r->start || !pr || request_resource(pr, r) < 0) {
-					printk(KERN_ERR "PCI: Cannot allocate resource region %d of bridge %s\n", idx, pci_name(dev));
-					/* Something is wrong with the region.
-					   Invalidate the resource to prevent child
-					   resource allocations in this range. */
+				if (!r->start || !pr ||
+				    request_resource(pr, r) < 0) {
+					printk(KERN_ERR "PCI: Cannot allocate "
+						"resource region %d "
+						"of bridge %s\n",
+						idx, pci_name(dev));
+					/*
+					 * Something is wrong with the region.
+					 * Invalidate the resource to prevent
+					 * child resource allocations in this
+					 * range.
+					 */
 					r->flags = 0;
 				}
 			}
@@ -131,7 +139,7 @@ static void __init pcibios_allocate_resources(int pass)
 
 	for_each_pci_dev(dev) {
 		pci_read_config_word(dev, PCI_COMMAND, &command);
-		for(idx = 0; idx < 6; idx++) {
+		for (idx = 0; idx < PCI_ROM_RESOURCE; idx++) {
 			r = &dev->resource[idx];
 			if (r->parent)		/* Already allocated */
 				continue;
@@ -142,11 +150,15 @@ static void __init pcibios_allocate_resources(int pass)
 			else
 				disabled = !(command & PCI_COMMAND_MEMORY);
 			if (pass == disabled) {
-				DBG("PCI: Resource %08lx-%08lx (f=%lx, d=%d, p=%d)\n",
+				DBG("PCI: Resource %08lx-%08lx "
+				    "(f=%lx, d=%d, p=%d)\n",
 				    r->start, r->end, r->flags, disabled, pass);
 				pr = pci_find_parent_resource(dev, r);
 				if (!pr || request_resource(pr, r) < 0) {
-					printk(KERN_ERR "PCI: Cannot allocate resource region %d of device %s\n", idx, pci_name(dev));
+					printk(KERN_ERR "PCI: Cannot allocate "
+						"resource region %d "
+						"of device %s\n",
+						idx, pci_name(dev));
 					/* We'll assign a new address later */
 					r->end -= r->start;
 					r->start = 0;
@@ -156,12 +168,16 @@ static void __init pcibios_allocate_resources(int pass)
 		if (!pass) {
 			r = &dev->resource[PCI_ROM_RESOURCE];
 			if (r->flags & IORESOURCE_ROM_ENABLE) {
-				/* Turn the ROM off, leave the resource region, but keep it unregistered. */
+				/* Turn the ROM off, leave the resource region,
+				 * but keep it unregistered. */
 				u32 reg;
-				DBG("PCI: Switching off ROM of %s\n", pci_name(dev));
+				DBG("PCI: Switching off ROM of %s\n",
+					pci_name(dev));
 				r->flags &= ~IORESOURCE_ROM_ENABLE;
-				pci_read_config_dword(dev, dev->rom_base_reg, &reg);
-				pci_write_config_dword(dev, dev->rom_base_reg, reg & ~PCI_ROM_ADDRESS_ENABLE);
+				pci_read_config_dword(dev,
+						dev->rom_base_reg, &reg);
+				pci_write_config_dword(dev, dev->rom_base_reg,
+						reg & ~PCI_ROM_ADDRESS_ENABLE);
 			}
 		}
 	}
@@ -173,9 +189,11 @@ static int __init pcibios_assign_resources(void)
 	struct resource *r, *pr;
 
 	if (!(pci_probe & PCI_ASSIGN_ROMS)) {
-		/* Try to use BIOS settings for ROMs, otherwise let
-		   pci_assign_unassigned_resources() allocate the new
-		   addresses. */
+		/*
+		 * Try to use BIOS settings for ROMs, otherwise let
+		 * pci_assign_unassigned_resources() allocate the new
+		 * addresses.
+		 */
 		for_each_pci_dev(dev) {
 			r = &dev->resource[PCI_ROM_RESOURCE];
 			if (!r->flags || !r->start)
@@ -215,9 +233,9 @@ int pcibios_enable_resources(struct pci_dev *dev, int mask)
 
 	pci_read_config_word(dev, PCI_COMMAND, &cmd);
 	old_cmd = cmd;
-	for(idx = 0; idx < PCI_NUM_RESOURCES; idx++) {
+	for (idx = 0; idx < PCI_NUM_RESOURCES; idx++) {
 		/* Only set up the requested stuff */
-		if (!(mask & (1<<idx)))
+		if (!(mask & (1 << idx)))
 			continue;
 
 		r = &dev->resource[idx];
@@ -227,7 +245,9 @@ int pcibios_enable_resources(struct pci_dev *dev, int mask)
 				(!(r->flags & IORESOURCE_ROM_ENABLE)))
 			continue;
 		if (!r->start && r->end) {
-			printk(KERN_ERR "PCI: Device %s not available because of resource collisions\n", pci_name(dev));
+			printk(KERN_ERR "PCI: Device %s not available "
+				"because of resource collisions\n",
+				pci_name(dev));
 			return -EINVAL;
 		}
 		if (r->flags & IORESOURCE_IO)
@@ -236,7 +256,8 @@ int pcibios_enable_resources(struct pci_dev *dev, int mask)
 			cmd |= PCI_COMMAND_MEMORY;
 	}
 	if (cmd != old_cmd) {
-		printk("PCI: Enabling device %s (%04x -> %04x)\n", pci_name(dev), old_cmd, cmd);
+		printk("PCI: Enabling device %s (%04x -> %04x)\n",
+			pci_name(dev), old_cmd, cmd);
 		pci_write_config_word(dev, PCI_COMMAND, cmd);
 	}
 	return 0;
@@ -258,7 +279,8 @@ void pcibios_set_master(struct pci_dev *dev)
 		lat = pcibios_max_latency;
 	else
 		return;
-	printk(KERN_DEBUG "PCI: Setting latency timer of device %s to %d\n", pci_name(dev), lat);
+	printk(KERN_DEBUG "PCI: Setting latency timer of device %s to %d\n",
+		pci_name(dev), lat);
 	pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat);
 }
 
diff --git a/arch/i386/pci/irq.c b/arch/i386/pci/irq.c
index 69163998ade..e65551cd821 100644
--- a/arch/i386/pci/irq.c
+++ b/arch/i386/pci/irq.c
@@ -543,6 +543,12 @@ static __init int intel_router_probe(struct irq_router *r, struct pci_dev *route
 		case PCI_DEVICE_ID_INTEL_ICH8_2:
 		case PCI_DEVICE_ID_INTEL_ICH8_3:
 		case PCI_DEVICE_ID_INTEL_ICH8_4:
+		case PCI_DEVICE_ID_INTEL_ICH9_0:
+		case PCI_DEVICE_ID_INTEL_ICH9_1:
+		case PCI_DEVICE_ID_INTEL_ICH9_2:
+		case PCI_DEVICE_ID_INTEL_ICH9_3:
+		case PCI_DEVICE_ID_INTEL_ICH9_4:
+		case PCI_DEVICE_ID_INTEL_ICH9_5:
 			r->name = "PIIX/ICH";
 			r->get = pirq_piix_get;
 			r->set = pirq_piix_set;
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index b30be7c48ba..f4edfbf2713 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -469,10 +469,11 @@ pcibios_fixup_resources(struct pci_dev *dev, int start, int limit)
 	}
 }
 
-static void __devinit pcibios_fixup_device_resources(struct pci_dev *dev)
+void __devinit pcibios_fixup_device_resources(struct pci_dev *dev)
 {
 	pcibios_fixup_resources(dev, 0, PCI_BRIDGE_RESOURCES);
 }
+EXPORT_SYMBOL_GPL(pcibios_fixup_device_resources);
 
 static void __devinit pcibios_fixup_bridge_resources(struct pci_dev *dev)
 {
@@ -493,6 +494,7 @@ pcibios_fixup_bus (struct pci_bus *b)
 	}
 	list_for_each_entry(dev, &b->devices, bus_list)
 		pcibios_fixup_device_resources(dev);
+	platform_pci_fixup_bus(b);
 
 	return;
 }
@@ -738,75 +740,44 @@ int ia64_pci_legacy_write(struct pci_bus *bus, u16 port, u32 val, u8 size)
 	return ret;
 }
 
+/* It's defined in drivers/pci/pci.c */
+extern u8 pci_cache_line_size;
+
 /**
- * pci_cacheline_size - determine cacheline size for PCI devices
- * @dev: void
+ * set_pci_cacheline_size - determine cacheline size for PCI devices
  *
  * We want to use the line-size of the outer-most cache.  We assume
  * that this line-size is the same for all CPUs.
  *
  * Code mostly taken from arch/ia64/kernel/palinfo.c:cache_info().
- *
- * RETURNS: An appropriate -ERRNO error value on eror, or zero for success.
  */
-static unsigned long
-pci_cacheline_size (void)
+static void __init set_pci_cacheline_size(void)
 {
 	u64 levels, unique_caches;
 	s64 status;
 	pal_cache_config_info_t cci;
-	static u8 cacheline_size;
-
-	if (cacheline_size)
-		return cacheline_size;
 
 	status = ia64_pal_cache_summary(&levels, &unique_caches);
 	if (status != 0) {
-		printk(KERN_ERR "%s: ia64_pal_cache_summary() failed (status=%ld)\n",
-		       __FUNCTION__, status);
-		return SMP_CACHE_BYTES;
+		printk(KERN_ERR "%s: ia64_pal_cache_summary() failed "
+			"(status=%ld)\n", __FUNCTION__, status);
+		return;
 	}
 
-	status = ia64_pal_cache_config_info(levels - 1, /* cache_type (data_or_unified)= */ 2,
-					    &cci);
+	status = ia64_pal_cache_config_info(levels - 1,
+				/* cache_type (data_or_unified)= */ 2, &cci);
 	if (status != 0) {
-		printk(KERN_ERR "%s: ia64_pal_cache_config_info() failed (status=%ld)\n",
-		       __FUNCTION__, status);
-		return SMP_CACHE_BYTES;
+		printk(KERN_ERR "%s: ia64_pal_cache_config_info() failed "
+			"(status=%ld)\n", __FUNCTION__, status);
+		return;
 	}
-	cacheline_size = 1 << cci.pcci_line_size;
-	return cacheline_size;
+	pci_cache_line_size = (1 << cci.pcci_line_size) / 4;
 }
 
-/**
- * pcibios_prep_mwi - helper function for drivers/pci/pci.c:pci_set_mwi()
- * @dev: the PCI device for which MWI is enabled
- *
- * For ia64, we can get the cacheline sizes from PAL.
- *
- * RETURNS: An appropriate -ERRNO error value on eror, or zero for success.
- */
-int
-pcibios_prep_mwi (struct pci_dev *dev)
-{
-	unsigned long desired_linesize, current_linesize;
-	int rc = 0;
-	u8 pci_linesize;
-
-	desired_linesize = pci_cacheline_size();
-
-	pci_read_config_byte(dev, PCI_CACHE_LINE_SIZE, &pci_linesize);
-	current_linesize = 4 * pci_linesize;
-	if (desired_linesize != current_linesize) {
-		printk(KERN_WARNING "PCI: slot %s has incorrect PCI cache line size of %lu bytes,",
-		       pci_name(dev), current_linesize);
-		if (current_linesize > desired_linesize) {
-			printk(" expected %lu bytes instead\n", desired_linesize);
-			rc = -EINVAL;
-		} else {
-			printk(" correcting to %lu\n", desired_linesize);
-			pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, desired_linesize / 4);
-		}
-	}
-	return rc;
+static int __init pcibios_init(void)
+{
+	set_pci_cacheline_size();
+	return 0;
 }
+
+subsys_initcall(pcibios_init);
diff --git a/arch/ia64/sn/kernel/Makefile b/arch/ia64/sn/kernel/Makefile
index 2d78f34dd76..0a59371d347 100644
--- a/arch/ia64/sn/kernel/Makefile
+++ b/arch/ia64/sn/kernel/Makefile
@@ -4,13 +4,14 @@
 # License.  See the file "COPYING" in the main directory of this archive
 # for more details.
 #
-# Copyright (C) 1999,2001-2005 Silicon Graphics, Inc.  All Rights Reserved.
+# Copyright (C) 1999,2001-2006 Silicon Graphics, Inc.  All Rights Reserved.
 #
 
 CPPFLAGS += -I$(srctree)/arch/ia64/sn/include
 
 obj-y				+= setup.o bte.o bte_error.o irq.o mca.o idle.o \
-				   huberror.o io_init.o iomv.o klconflib.o pio_phys.o \
+				   huberror.o io_acpi_init.o io_common.o \
+				   io_init.o iomv.o klconflib.o pio_phys.o \
 				   sn2/
 obj-$(CONFIG_IA64_GENERIC)      += machvec.o
 obj-$(CONFIG_SGI_TIOCX)		+= tiocx.o
diff --git a/arch/ia64/sn/kernel/io_acpi_init.c b/arch/ia64/sn/kernel/io_acpi_init.c
new file mode 100644
index 00000000000..99d7f278612
--- /dev/null
+++ b/arch/ia64/sn/kernel/io_acpi_init.c
@@ -0,0 +1,231 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2006 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#include <asm/sn/types.h>
+#include <asm/sn/addrs.h>
+#include <asm/sn/pcidev.h>
+#include <asm/sn/pcibus_provider_defs.h>
+#include <asm/sn/sn_sal.h>
+#include "xtalk/hubdev.h"
+#include <linux/acpi.h>
+
+
+/*
+ * The code in this file will only be executed when running with
+ * a PROM that has ACPI IO support. (i.e., SN_ACPI_BASE_SUPPORT() == 1)
+ */
+
+
+/*
+ * This value must match the UUID the PROM uses
+ * (io/acpi/defblk.c) when building a vendor descriptor.
+ */
+struct acpi_vendor_uuid sn_uuid = {
+	.subtype = 0,
+	.data	= { 0x2c, 0xc6, 0xa6, 0xfe, 0x9c, 0x44, 0xda, 0x11,
+		    0xa2, 0x7c, 0x08, 0x00, 0x69, 0x13, 0xea, 0x51 },
+};
+
+/*
+ * Perform the early IO init in PROM.
+ */
+static s64
+sal_ioif_init(u64 *result)
+{
+	struct ia64_sal_retval isrv = {0,0,0,0};
+
+	SAL_CALL_NOLOCK(isrv,
+			SN_SAL_IOIF_INIT, 0, 0, 0, 0, 0, 0, 0);
+	*result = isrv.v0;
+	return isrv.status;
+}
+
+/*
+ * sn_hubdev_add - The 'add' function of the acpi_sn_hubdev_driver.
+ *		   Called for every "SGIHUB" or "SGITIO" device defined
+ *		   in the ACPI namespace.
+ */
+static int __init
+sn_hubdev_add(struct acpi_device *device)
+{
+	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+	u64 addr;
+	struct hubdev_info *hubdev;
+	struct hubdev_info *hubdev_ptr;
+	int i;
+	u64 nasid;
+	struct acpi_resource *resource;
+	int ret = 0;
+	acpi_status status;
+	struct acpi_resource_vendor_typed *vendor;
+	extern void sn_common_hubdev_init(struct hubdev_info *);
+
+	status = acpi_get_vendor_resource(device->handle, METHOD_NAME__CRS,
+					  &sn_uuid, &buffer);
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_ERR
+		       "sn_hubdev_add: acpi_get_vendor_resource() failed: %d\n",
+		        status);
+		return 1;
+	}
+
+	resource = buffer.pointer;
+	vendor = &resource->data.vendor_typed;
+	if ((vendor->byte_length - sizeof(struct acpi_vendor_uuid)) !=
+	    sizeof(struct hubdev_info *)) {
+		printk(KERN_ERR
+		       "sn_hubdev_add: Invalid vendor data length: %d\n",
+		        vendor->byte_length);
+		ret = 1;
+		goto exit;
+	}
+
+	memcpy(&addr, vendor->byte_data, sizeof(struct hubdev_info *));
+	hubdev_ptr = __va((struct hubdev_info *) addr);
+
+	nasid = hubdev_ptr->hdi_nasid;
+	i = nasid_to_cnodeid(nasid);
+	hubdev = (struct hubdev_info *)(NODEPDA(i)->pdinfo);
+	*hubdev = *hubdev_ptr;
+	sn_common_hubdev_init(hubdev);
+
+exit:
+	kfree(buffer.pointer);
+	return ret;
+}
+
+/*
+ * sn_get_bussoft_ptr() - The pcibus_bussoft pointer is found in
+ *			  the ACPI Vendor resource for this bus.
+ */
+static struct pcibus_bussoft *
+sn_get_bussoft_ptr(struct pci_bus *bus)
+{
+	u64 addr;
+	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+	acpi_handle handle;
+	struct pcibus_bussoft *prom_bussoft_ptr;
+	struct acpi_resource *resource;
+	acpi_status status;
+	struct acpi_resource_vendor_typed *vendor;
+
+
+	handle = PCI_CONTROLLER(bus)->acpi_handle;
+	status = acpi_get_vendor_resource(handle, METHOD_NAME__CRS,
+					  &sn_uuid, &buffer);
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_ERR "get_acpi_pcibus_ptr: "
+		       "get_acpi_bussoft_info() failed: %d\n",
+		       status);
+		return NULL;
+	}
+	resource = buffer.pointer;
+	vendor = &resource->data.vendor_typed;
+
+	if ((vendor->byte_length - sizeof(struct acpi_vendor_uuid)) !=
+	     sizeof(struct pcibus_bussoft *)) {
+		printk(KERN_ERR
+		       "get_acpi_bussoft_ptr: Invalid vendor data "
+		       "length %d\n", vendor->byte_length);
+		kfree(buffer.pointer);
+		return NULL;
+	}
+	memcpy(&addr, vendor->byte_data, sizeof(struct pcibus_bussoft *));
+	prom_bussoft_ptr = __va((struct pcibus_bussoft *) addr);
+	kfree(buffer.pointer);
+
+	return prom_bussoft_ptr;
+}
+
+/*
+ * sn_acpi_bus_fixup
+ */
+void
+sn_acpi_bus_fixup(struct pci_bus *bus)
+{
+	struct pci_dev *pci_dev = NULL;
+	struct pcibus_bussoft *prom_bussoft_ptr;
+	extern void sn_common_bus_fixup(struct pci_bus *,
+					struct pcibus_bussoft *);
+
+	if (!bus->parent) {	/* If root bus */
+		prom_bussoft_ptr = sn_get_bussoft_ptr(bus);
+		if (prom_bussoft_ptr == NULL) {
+			printk(KERN_ERR
+			       "sn_pci_fixup_bus: 0x%04x:0x%02x Unable to "
+			       "obtain prom_bussoft_ptr\n",
+			       pci_domain_nr(bus), bus->number);
+			return;
+		}
+		sn_common_bus_fixup(bus, prom_bussoft_ptr);
+	}
+	list_for_each_entry(pci_dev, &bus->devices, bus_list) {
+		sn_pci_fixup_slot(pci_dev);
+	}
+}
+
+/*
+ * sn_acpi_slot_fixup - Perform any SN specific slot fixup.
+ *			At present there does not appear to be
+ *			any generic way to handle a ROM image
+ *			that has been shadowed by the PROM, so
+ *			we pass a pointer to it	within the
+ *			pcidev_info structure.
+ */
+
+void
+sn_acpi_slot_fixup(struct pci_dev *dev, struct pcidev_info *pcidev_info)
+{
+	void __iomem *addr;
+	size_t size;
+
+	if (pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE]) {
+		/*
+		 * A valid ROM image exists and has been shadowed by the
+		 * PROM. Setup the pci_dev ROM resource to point to
+		 * the shadowed copy.
+		 */
+		size = dev->resource[PCI_ROM_RESOURCE].end -
+				dev->resource[PCI_ROM_RESOURCE].start;
+		addr =
+		     ioremap(pcidev_info->pdi_pio_mapped_addr[PCI_ROM_RESOURCE],
+			     size);
+		dev->resource[PCI_ROM_RESOURCE].start = (unsigned long) addr;
+		dev->resource[PCI_ROM_RESOURCE].end =
+						(unsigned long) addr + size;
+		dev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_BIOS_COPY;
+	}
+}
+
+static struct acpi_driver acpi_sn_hubdev_driver = {
+	.name = "SGI HUBDEV Driver",
+	.ids = "SGIHUB,SGITIO",
+	.ops = {
+		.add = sn_hubdev_add,
+		},
+};
+
+
+/*
+ * sn_io_acpi_init - PROM has ACPI support for IO, defining at a minimum the
+ *		     nodes and root buses in the DSDT. As a result, bus scanning
+ *		     will be initiated by the Linux ACPI code.
+ */
+
+void __init
+sn_io_acpi_init(void)
+{
+	u64 result;
+	s64 status;
+
+	acpi_bus_register_driver(&acpi_sn_hubdev_driver);
+	status = sal_ioif_init(&result);
+	if (status || result)
+		panic("sal_ioif_init failed: [%lx] %s\n",
+		      status, ia64_sal_strerror(status));
+}
diff --git a/arch/ia64/sn/kernel/io_common.c b/arch/ia64/sn/kernel/io_common.c
new file mode 100644
index 00000000000..d4dd8f4b6b8
--- /dev/null
+++ b/arch/ia64/sn/kernel/io_common.c
@@ -0,0 +1,613 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2006 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#include <linux/bootmem.h>
+#include <asm/sn/types.h>
+#include <asm/sn/addrs.h>
+#include <asm/sn/sn_feature_sets.h>
+#include <asm/sn/geo.h>
+#include <asm/sn/io.h>
+#include <asm/sn/l1.h>
+#include <asm/sn/module.h>
+#include <asm/sn/pcibr_provider.h>
+#include <asm/sn/pcibus_provider_defs.h>
+#include <asm/sn/pcidev.h>
+#include <asm/sn/simulator.h>
+#include <asm/sn/sn_sal.h>
+#include <asm/sn/tioca_provider.h>
+#include <asm/sn/tioce_provider.h>
+#include "xtalk/hubdev.h"
+#include "xtalk/xwidgetdev.h"
+#include <linux/acpi.h>
+#include <asm/sn/sn2/sn_hwperf.h>
+#include <asm/sn/acpi.h>
+
+extern void sn_init_cpei_timer(void);
+extern void register_sn_procfs(void);
+extern void sn_acpi_bus_fixup(struct pci_bus *);
+extern void sn_bus_fixup(struct pci_bus *);
+extern void sn_acpi_slot_fixup(struct pci_dev *, struct pcidev_info *);
+extern void sn_more_slot_fixup(struct pci_dev *, struct pcidev_info *);
+extern void sn_legacy_pci_window_fixup(struct pci_controller *, u64, u64);
+extern void sn_io_acpi_init(void);
+extern void sn_io_init(void);
+
+
+static struct list_head sn_sysdata_list;
+
+/* sysdata list struct */
+struct sysdata_el {
+	struct list_head entry;
+	void *sysdata;
+};
+
+int sn_ioif_inited;		/* SN I/O infrastructure initialized? */
+
+struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES];	/* indexed by asic type */
+
+/*
+ * Hooks and struct for unsupported pci providers
+ */
+
+static dma_addr_t
+sn_default_pci_map(struct pci_dev *pdev, unsigned long paddr, size_t size, int type)
+{
+	return 0;
+}
+
+static void
+sn_default_pci_unmap(struct pci_dev *pdev, dma_addr_t addr, int direction)
+{
+	return;
+}
+
+static void *
+sn_default_pci_bus_fixup(struct pcibus_bussoft *soft, struct pci_controller *controller)
+{
+	return NULL;
+}
+
+static struct sn_pcibus_provider sn_pci_default_provider = {
+	.dma_map = sn_default_pci_map,
+	.dma_map_consistent = sn_default_pci_map,
+	.dma_unmap = sn_default_pci_unmap,
+	.bus_fixup = sn_default_pci_bus_fixup,
+};
+
+/*
+ * Retrieve the DMA Flush List given nasid, widget, and device.
+ * This list is needed to implement the WAR - Flush DMA data on PIO Reads.
+ */
+static inline u64
+sal_get_device_dmaflush_list(u64 nasid, u64 widget_num, u64 device_num,
+			     u64 address)
+{
+	struct ia64_sal_retval ret_stuff;
+	ret_stuff.status = 0;
+	ret_stuff.v0 = 0;
+
+	SAL_CALL_NOLOCK(ret_stuff,
+			(u64) SN_SAL_IOIF_GET_DEVICE_DMAFLUSH_LIST,
+			(u64) nasid, (u64) widget_num,
+			(u64) device_num, (u64) address, 0, 0, 0);
+	return ret_stuff.status;
+}
+
+/*
+ * Retrieve the pci device information given the bus and device|function number.
+ */
+static inline u64
+sal_get_pcidev_info(u64 segment, u64 bus_number, u64 devfn, u64 pci_dev,
+		    u64 sn_irq_info)
+{
+	struct ia64_sal_retval ret_stuff;
+	ret_stuff.status = 0;
+	ret_stuff.v0 = 0;
+
+	SAL_CALL_NOLOCK(ret_stuff,
+			(u64) SN_SAL_IOIF_GET_PCIDEV_INFO,
+			(u64) segment, (u64) bus_number, (u64) devfn,
+			(u64) pci_dev,
+			sn_irq_info, 0, 0);
+	return ret_stuff.v0;
+}
+
+/*
+ * sn_pcidev_info_get() - Retrieve the pcidev_info struct for the specified
+ *			  device.
+ */
+inline struct pcidev_info *
+sn_pcidev_info_get(struct pci_dev *dev)
+{
+	struct pcidev_info *pcidev;
+
+	list_for_each_entry(pcidev,
+			    &(SN_PLATFORM_DATA(dev)->pcidev_info), pdi_list) {
+		if (pcidev->pdi_linux_pcidev == dev)
+			return pcidev;
+	}
+	return NULL;
+}
+
+/* Older PROM flush WAR
+ *
+ * 01/16/06 -- This war will be in place until a new official PROM is released.
+ * Additionally note that the struct sn_flush_device_war also has to be
+ * removed from arch/ia64/sn/include/xtalk/hubdev.h
+ */
+static u8 war_implemented = 0;
+
+static s64 sn_device_fixup_war(u64 nasid, u64 widget, int device,
+			       struct sn_flush_device_common *common)
+{
+	struct sn_flush_device_war *war_list;
+	struct sn_flush_device_war *dev_entry;
+	struct ia64_sal_retval isrv = {0,0,0,0};
+
+	if (!war_implemented) {
+		printk(KERN_WARNING "PROM version < 4.50 -- implementing old "
+		       "PROM flush WAR\n");
+		war_implemented = 1;
+	}
+
+	war_list = kzalloc(DEV_PER_WIDGET * sizeof(*war_list), GFP_KERNEL);
+	if (!war_list)
+		BUG();
+
+	SAL_CALL_NOLOCK(isrv, SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST,
+			nasid, widget, __pa(war_list), 0, 0, 0 ,0);
+	if (isrv.status)
+		panic("sn_device_fixup_war failed: %s\n",
+		      ia64_sal_strerror(isrv.status));
+
+	dev_entry = war_list + device;
+	memcpy(common,dev_entry, sizeof(*common));
+	kfree(war_list);
+
+	return isrv.status;
+}
+
+/*
+ * sn_common_hubdev_init() - This routine is called to initialize the HUB data
+ *			     structure for each node in the system.
+ */
+void __init
+sn_common_hubdev_init(struct hubdev_info *hubdev)
+{
+
+	struct sn_flush_device_kernel *sn_flush_device_kernel;
+	struct sn_flush_device_kernel *dev_entry;
+	s64 status;
+	int widget, device, size;
+
+	/* Attach the error interrupt handlers */
+	if (hubdev->hdi_nasid & 1)	/* If TIO */
+		ice_error_init(hubdev);
+	else
+		hub_error_init(hubdev);
+
+	for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++)
+		hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev;
+
+	if (!hubdev->hdi_flush_nasid_list.widget_p)
+		return;
+
+	size = (HUB_WIDGET_ID_MAX + 1) *
+		sizeof(struct sn_flush_device_kernel *);
+	hubdev->hdi_flush_nasid_list.widget_p =
+		kzalloc(size, GFP_KERNEL);
+	if (!hubdev->hdi_flush_nasid_list.widget_p)
+		BUG();
+
+	for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
+		size = DEV_PER_WIDGET *
+			sizeof(struct sn_flush_device_kernel);
+		sn_flush_device_kernel = kzalloc(size, GFP_KERNEL);
+		if (!sn_flush_device_kernel)
+			BUG();
+
+		dev_entry = sn_flush_device_kernel;
+		for (device = 0; device < DEV_PER_WIDGET;
+		     device++, dev_entry++) {
+			size = sizeof(struct sn_flush_device_common);
+			dev_entry->common = kzalloc(size, GFP_KERNEL);
+			if (!dev_entry->common)
+				BUG();
+			if (sn_prom_feature_available(PRF_DEVICE_FLUSH_LIST))
+				status = sal_get_device_dmaflush_list(
+					     hubdev->hdi_nasid, widget, device,
+					     (u64)(dev_entry->common));
+			else
+				status = sn_device_fixup_war(hubdev->hdi_nasid,
+							     widget, device,
+							     dev_entry->common);
+			if (status != SALRET_OK)
+				panic("SAL call failed: %s\n",
+				      ia64_sal_strerror(status));
+
+			spin_lock_init(&dev_entry->sfdl_flush_lock);
+		}
+
+		if (sn_flush_device_kernel)
+			hubdev->hdi_flush_nasid_list.widget_p[widget] =
+							 sn_flush_device_kernel;
+	}
+}
+
+void sn_pci_unfixup_slot(struct pci_dev *dev)
+{
+	struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev;
+
+	sn_irq_unfixup(dev);
+	pci_dev_put(host_pci_dev);
+	pci_dev_put(dev);
+}
+
+/*
+ * sn_pci_fixup_slot() - This routine sets up a slot's resources consistent
+ *			 with the Linux PCI abstraction layer. Resources
+ *			 acquired from our PCI provider include PIO maps
+ *			 to BAR space and interrupt objects.
+ */
+void sn_pci_fixup_slot(struct pci_dev *dev)
+{
+	int segment = pci_domain_nr(dev->bus);
+	int status = 0;
+	struct pcibus_bussoft *bs;
+ 	struct pci_bus *host_pci_bus;
+ 	struct pci_dev *host_pci_dev;
+	struct pcidev_info *pcidev_info;
+ 	struct sn_irq_info *sn_irq_info;
+ 	unsigned int bus_no, devfn;
+
+	pci_dev_get(dev); /* for the sysdata pointer */
+	pcidev_info = kzalloc(sizeof(struct pcidev_info), GFP_KERNEL);
+	if (!pcidev_info)
+		BUG();		/* Cannot afford to run out of memory */
+
+	sn_irq_info = kzalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
+	if (!sn_irq_info)
+		BUG();		/* Cannot afford to run out of memory */
+
+	/* Call to retrieve pci device information needed by kernel. */
+	status = sal_get_pcidev_info((u64) segment, (u64) dev->bus->number,
+				     dev->devfn,
+				     (u64) __pa(pcidev_info),
+				     (u64) __pa(sn_irq_info));
+	if (status)
+		BUG(); /* Cannot get platform pci device information */
+
+	/* Add pcidev_info to list in pci_controller.platform_data */
+	list_add_tail(&pcidev_info->pdi_list,
+		      &(SN_PLATFORM_DATA(dev->bus)->pcidev_info));
+
+	if (SN_ACPI_BASE_SUPPORT())
+		sn_acpi_slot_fixup(dev, pcidev_info);
+	else
+		sn_more_slot_fixup(dev, pcidev_info);
+	/*
+	 * Using the PROMs values for the PCI host bus, get the Linux
+ 	 * PCI host_pci_dev struct and set up host bus linkages
+ 	 */
+
+	bus_no = (pcidev_info->pdi_slot_host_handle >> 32) & 0xff;
+	devfn = pcidev_info->pdi_slot_host_handle & 0xffffffff;
+ 	host_pci_bus = pci_find_bus(segment, bus_no);
+ 	host_pci_dev = pci_get_slot(host_pci_bus, devfn);
+
+	pcidev_info->host_pci_dev = host_pci_dev;
+	pcidev_info->pdi_linux_pcidev = dev;
+	pcidev_info->pdi_host_pcidev_info = SN_PCIDEV_INFO(host_pci_dev);
+	bs = SN_PCIBUS_BUSSOFT(dev->bus);
+	pcidev_info->pdi_pcibus_info = bs;
+
+	if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
+		SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type];
+	} else {
+		SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider;
+	}
+
+	/* Only set up IRQ stuff if this device has a host bus context */
+	if (bs && sn_irq_info->irq_irq) {
+		pcidev_info->pdi_sn_irq_info = sn_irq_info;
+		dev->irq = pcidev_info->pdi_sn_irq_info->irq_irq;
+		sn_irq_fixup(dev, sn_irq_info);
+	} else {
+		pcidev_info->pdi_sn_irq_info = NULL;
+		kfree(sn_irq_info);
+	}
+}
+
+/*
+ * sn_common_bus_fixup - Perform platform specific bus fixup.
+ *			 Execute the ASIC specific fixup routine
+ *			 for this bus.
+ */
+void
+sn_common_bus_fixup(struct pci_bus *bus,
+		    struct pcibus_bussoft *prom_bussoft_ptr)
+{
+	int cnode;
+	struct pci_controller *controller;
+	struct hubdev_info *hubdev_info;
+	int nasid;
+	void *provider_soft;
+	struct sn_pcibus_provider *provider;
+	struct sn_platform_data *sn_platform_data;
+
+	controller = PCI_CONTROLLER(bus);
+	/*
+	 * Per-provider fixup.  Copies the bus soft structure from prom
+	 * to local area and links SN_PCIBUS_BUSSOFT().
+	 */
+
+	if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES) {
+		printk(KERN_WARNING "sn_common_bus_fixup: Unsupported asic type, %d",
+		       prom_bussoft_ptr->bs_asic_type);
+		return;
+	}
+
+	if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
+		return;	/* no further fixup necessary */
+
+	provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
+	if (provider == NULL)
+		panic("sn_common_bus_fixup: No provider registered for this asic type, %d",
+		      prom_bussoft_ptr->bs_asic_type);
+
+	if (provider->bus_fixup)
+		provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr,
+				 controller);
+	else
+		provider_soft = NULL;
+
+	/*
+	 * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
+	 * after this point.
+	 */
+	controller->platform_data = kzalloc(sizeof(struct sn_platform_data),
+					    GFP_KERNEL);
+	if (controller->platform_data == NULL)
+		BUG();
+	sn_platform_data =
+			(struct sn_platform_data *) controller->platform_data;
+	sn_platform_data->provider_soft = provider_soft;
+	INIT_LIST_HEAD(&((struct sn_platform_data *)
+			 controller->platform_data)->pcidev_info);
+	nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
+	cnode = nasid_to_cnodeid(nasid);
+	hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
+	SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
+	    &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
+
+	/*
+	 * If the node information we obtained during the fixup phase is
+	 * invalid then set controller->node to -1 (undetermined)
+	 */
+	if (controller->node >= num_online_nodes()) {
+		struct pcibus_bussoft *b = SN_PCIBUS_BUSSOFT(bus);
+
+		printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%u"
+		       "L_IO=%lx L_MEM=%lx BASE=%lx\n",
+		       b->bs_asic_type, b->bs_xid, b->bs_persist_busnum,
+		       b->bs_legacy_io, b->bs_legacy_mem, b->bs_base);
+		printk(KERN_WARNING "on node %d but only %d nodes online."
+		       "Association set to undetermined.\n",
+		       controller->node, num_online_nodes());
+		controller->node = -1;
+	}
+}
+
+void sn_bus_store_sysdata(struct pci_dev *dev)
+{
+	struct sysdata_el *element;
+
+	element = kzalloc(sizeof(struct sysdata_el), GFP_KERNEL);
+	if (!element) {
+		dev_dbg(dev, "%s: out of memory!\n", __FUNCTION__);
+		return;
+	}
+	element->sysdata = SN_PCIDEV_INFO(dev);
+	list_add(&element->entry, &sn_sysdata_list);
+}
+
+void sn_bus_free_sysdata(void)
+{
+	struct sysdata_el *element;
+	struct list_head *list, *safe;
+
+	list_for_each_safe(list, safe, &sn_sysdata_list) {
+		element = list_entry(list, struct sysdata_el, entry);
+		list_del(&element->entry);
+		list_del(&(((struct pcidev_info *)
+			     (element->sysdata))->pdi_list));
+		kfree(element->sysdata);
+		kfree(element);
+	}
+	return;
+}
+
+/*
+ * hubdev_init_node() - Creates the HUB data structure and link them to it's
+ *			own NODE specific data area.
+ */
+void hubdev_init_node(nodepda_t * npda, cnodeid_t node)
+{
+	struct hubdev_info *hubdev_info;
+	int size;
+	pg_data_t *pg;
+
+	size = sizeof(struct hubdev_info);
+
+	if (node >= num_online_nodes())	/* Headless/memless IO nodes */
+		pg = NODE_DATA(0);
+	else
+		pg = NODE_DATA(node);
+
+	hubdev_info = (struct hubdev_info *)alloc_bootmem_node(pg, size);
+
+	npda->pdinfo = (void *)hubdev_info;
+}
+
+geoid_t
+cnodeid_get_geoid(cnodeid_t cnode)
+{
+	struct hubdev_info *hubdev;
+
+	hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
+	return hubdev->hdi_geoid;
+}
+
+void sn_generate_path(struct pci_bus *pci_bus, char *address)
+{
+	nasid_t nasid;
+	cnodeid_t cnode;
+	geoid_t geoid;
+	moduleid_t moduleid;
+	u16 bricktype;
+
+	nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
+	cnode = nasid_to_cnodeid(nasid);
+	geoid = cnodeid_get_geoid(cnode);
+	moduleid = geo_module(geoid);
+
+	sprintf(address, "module_%c%c%c%c%.2d",
+		'0'+RACK_GET_CLASS(MODULE_GET_RACK(moduleid)),
+		'0'+RACK_GET_GROUP(MODULE_GET_RACK(moduleid)),
+		'0'+RACK_GET_NUM(MODULE_GET_RACK(moduleid)),
+		MODULE_GET_BTCHAR(moduleid), MODULE_GET_BPOS(moduleid));
+
+	/* Tollhouse requires slot id to be displayed */
+	bricktype = MODULE_GET_BTYPE(moduleid);
+	if ((bricktype == L1_BRICKTYPE_191010) ||
+	    (bricktype == L1_BRICKTYPE_1932))
+			sprintf(address, "%s^%d", address, geo_slot(geoid));
+}
+
+/*
+ * sn_pci_fixup_bus() - Perform SN specific setup of software structs
+ *			(pcibus_bussoft, pcidev_info) and hardware
+ *			registers, for the specified bus and devices under it.
+ */
+void __devinit
+sn_pci_fixup_bus(struct pci_bus *bus)
+{
+
+	if (SN_ACPI_BASE_SUPPORT())
+		sn_acpi_bus_fixup(bus);
+	else
+		sn_bus_fixup(bus);
+}
+
+/*
+ * sn_io_early_init - Perform early IO (and some non-IO) initialization.
+ *		      In particular, setup the sn_pci_provider[] array.
+ *		      This needs to be done prior to any bus scanning
+ *		      (acpi_scan_init()) in the ACPI case, as the SN
+ *		      bus fixup code will reference the array.
+ */
+static int __init
+sn_io_early_init(void)
+{
+	int i;
+
+	if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
+		return 0;
+
+	/*
+	 * prime sn_pci_provider[].  Individial provider init routines will
+	 * override their respective default entries.
+	 */
+
+	for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
+		sn_pci_provider[i] = &sn_pci_default_provider;
+
+	pcibr_init_provider();
+	tioca_init_provider();
+	tioce_init_provider();
+
+	/*
+	 * This is needed to avoid bounce limit checks in the blk layer
+	 */
+	ia64_max_iommu_merge_mask = ~PAGE_MASK;
+
+	sn_irq_lh_init();
+	INIT_LIST_HEAD(&sn_sysdata_list);
+	sn_init_cpei_timer();
+
+#ifdef CONFIG_PROC_FS
+	register_sn_procfs();
+#endif
+
+	printk(KERN_INFO "ACPI  DSDT OEM Rev 0x%x\n",
+	       acpi_gbl_DSDT->oem_revision);
+	if (SN_ACPI_BASE_SUPPORT())
+		sn_io_acpi_init();
+	else
+		sn_io_init();
+	return 0;
+}
+
+arch_initcall(sn_io_early_init);
+
+/*
+ * sn_io_late_init() - Perform any final platform specific IO initialization.
+ */
+
+int __init
+sn_io_late_init(void)
+{
+	struct pci_bus *bus;
+	struct pcibus_bussoft *bussoft;
+	cnodeid_t cnode;
+	nasid_t nasid;
+	cnodeid_t near_cnode;
+
+	if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
+		return 0;
+
+	/*
+	 * Setup closest node in pci_controller->node for
+	 * PIC, TIOCP, TIOCE (TIOCA does it during bus fixup using
+	 * info from the PROM).
+	 */
+	bus = NULL;
+	while ((bus = pci_find_next_bus(bus)) != NULL) {
+		bussoft = SN_PCIBUS_BUSSOFT(bus);
+		nasid = NASID_GET(bussoft->bs_base);
+		cnode = nasid_to_cnodeid(nasid);
+		if ((bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCP) ||
+		    (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCE)) {
+			/* TIO PCI Bridge: find nearest node with CPUs */
+			int e = sn_hwperf_get_nearest_node(cnode, NULL,
+							   &near_cnode);
+			if (e < 0) {
+				near_cnode = (cnodeid_t)-1; /* use any node */
+				printk(KERN_WARNING "pcibr_bus_fixup: failed "
+				       "to find near node with CPUs to TIO "
+				       "node %d, err=%d\n", cnode, e);
+			}
+			PCI_CONTROLLER(bus)->node = near_cnode;
+		} else if (bussoft->bs_asic_type == PCIIO_ASIC_TYPE_PIC) {
+			PCI_CONTROLLER(bus)->node = cnode;
+		}
+	}
+
+	sn_ioif_inited = 1;	/* SN I/O infrastructure now initialized */
+
+	return 0;
+}
+
+fs_initcall(sn_io_late_init);
+
+EXPORT_SYMBOL(sn_pci_fixup_slot);
+EXPORT_SYMBOL(sn_pci_unfixup_slot);
+EXPORT_SYMBOL(sn_bus_store_sysdata);
+EXPORT_SYMBOL(sn_bus_free_sysdata);
+EXPORT_SYMBOL(sn_generate_path);
+
diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c
index dc09a6a28a3..9ad843e0383 100644
--- a/arch/ia64/sn/kernel/io_init.c
+++ b/arch/ia64/sn/kernel/io_init.c
@@ -3,103 +3,28 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 1992 - 1997, 2000-2005 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 1992 - 1997, 2000-2006 Silicon Graphics, Inc. All rights reserved.
  */
 
-#include <linux/bootmem.h>
-#include <linux/nodemask.h>
 #include <asm/sn/types.h>
 #include <asm/sn/addrs.h>
-#include <asm/sn/sn_feature_sets.h>
-#include <asm/sn/geo.h>
 #include <asm/sn/io.h>
-#include <asm/sn/l1.h>
 #include <asm/sn/module.h>
-#include <asm/sn/pcibr_provider.h>
+#include <asm/sn/intr.h>
 #include <asm/sn/pcibus_provider_defs.h>
 #include <asm/sn/pcidev.h>
-#include <asm/sn/simulator.h>
 #include <asm/sn/sn_sal.h>
-#include <asm/sn/tioca_provider.h>
-#include <asm/sn/tioce_provider.h>
 #include "xtalk/hubdev.h"
-#include "xtalk/xwidgetdev.h"
-
-
-extern void sn_init_cpei_timer(void);
-extern void register_sn_procfs(void);
-
-static struct list_head sn_sysdata_list;
-
-/* sysdata list struct */
-struct sysdata_el {
-	struct list_head entry;
-	void *sysdata;
-};
-
-struct slab_info {
-	struct hubdev_info hubdev;
-};
-
-struct brick {
-	moduleid_t id;		/* Module ID of this module        */
-	struct slab_info slab_info[MAX_SLABS + 1];
-};
-
-int sn_ioif_inited;		/* SN I/O infrastructure initialized? */
-
-struct sn_pcibus_provider *sn_pci_provider[PCIIO_ASIC_MAX_TYPES];	/* indexed by asic type */
-
-static int max_segment_number;		 /* Default highest segment number */
-static int max_pcibus_number = 255;	/* Default highest pci bus number */
 
 /*
- * Hooks and struct for unsupported pci providers
+ * The code in this file will only be executed when running with
+ * a PROM that does _not_ have base ACPI IO support.
+ * (i.e., SN_ACPI_BASE_SUPPORT() == 0)
  */
 
-static dma_addr_t
-sn_default_pci_map(struct pci_dev *pdev, unsigned long paddr, size_t size, int type)
-{
-	return 0;
-}
-
-static void
-sn_default_pci_unmap(struct pci_dev *pdev, dma_addr_t addr, int direction)
-{
-	return;
-}
-
-static void *
-sn_default_pci_bus_fixup(struct pcibus_bussoft *soft, struct pci_controller *controller)
-{
-	return NULL;
-}
-
-static struct sn_pcibus_provider sn_pci_default_provider = {
-	.dma_map = sn_default_pci_map,
-	.dma_map_consistent = sn_default_pci_map,
-	.dma_unmap = sn_default_pci_unmap,
-	.bus_fixup = sn_default_pci_bus_fixup,
-};
-
-/*
- * Retrieve the DMA Flush List given nasid, widget, and device.
- * This list is needed to implement the WAR - Flush DMA data on PIO Reads.
- */
-static inline u64
-sal_get_device_dmaflush_list(u64 nasid, u64 widget_num, u64 device_num,
-			     u64 address)
-{
-	struct ia64_sal_retval ret_stuff;
-	ret_stuff.status = 0;
-	ret_stuff.v0 = 0;
+static int max_segment_number;		 /* Default highest segment number */
+static int max_pcibus_number = 255;	/* Default highest pci bus number */
 
-	SAL_CALL_NOLOCK(ret_stuff,
-			(u64) SN_SAL_IOIF_GET_DEVICE_DMAFLUSH_LIST,
-			(u64) nasid, (u64) widget_num,
-			(u64) device_num, (u64) address, 0, 0, 0);
-	return ret_stuff.status;
-}
 
 /*
  * Retrieve the hub device info structure for the given nasid.
@@ -131,93 +56,20 @@ static inline u64 sal_get_pcibus_info(u64 segment, u64 busnum, u64 address)
 	return ret_stuff.v0;
 }
 
-/*
- * Retrieve the pci device information given the bus and device|function number.
- */
-static inline u64
-sal_get_pcidev_info(u64 segment, u64 bus_number, u64 devfn, u64 pci_dev,
-		    u64 sn_irq_info)
-{
-	struct ia64_sal_retval ret_stuff;
-	ret_stuff.status = 0;
-	ret_stuff.v0 = 0;
-
-	SAL_CALL_NOLOCK(ret_stuff,
-			(u64) SN_SAL_IOIF_GET_PCIDEV_INFO,
-			(u64) segment, (u64) bus_number, (u64) devfn,
-			(u64) pci_dev,
-			sn_irq_info, 0, 0);
-	return ret_stuff.v0;
-}
-
-/*
- * sn_pcidev_info_get() - Retrieve the pcidev_info struct for the specified
- *			  device.
- */
-inline struct pcidev_info *
-sn_pcidev_info_get(struct pci_dev *dev)
-{
-	struct pcidev_info *pcidev;
-
-	list_for_each_entry(pcidev,
-			    &(SN_PCI_CONTROLLER(dev)->pcidev_info), pdi_list) {
-		if (pcidev->pdi_linux_pcidev == dev) {
-			return pcidev;
-		}
-	}
-	return NULL;
-}
-
-/* Older PROM flush WAR
- *
- * 01/16/06 -- This war will be in place until a new official PROM is released.
- * Additionally note that the struct sn_flush_device_war also has to be
- * removed from arch/ia64/sn/include/xtalk/hubdev.h
- */
-static u8 war_implemented = 0;
-
-static s64 sn_device_fixup_war(u64 nasid, u64 widget, int device,
-			       struct sn_flush_device_common *common)
-{
-	struct sn_flush_device_war *war_list;
-	struct sn_flush_device_war *dev_entry;
-	struct ia64_sal_retval isrv = {0,0,0,0};
-
-	if (!war_implemented) {
-		printk(KERN_WARNING "PROM version < 4.50 -- implementing old "
-		       "PROM flush WAR\n");
-		war_implemented = 1;
-	}
-
-	war_list = kzalloc(DEV_PER_WIDGET * sizeof(*war_list), GFP_KERNEL);
-	if (!war_list)
-		BUG();
-
-	SAL_CALL_NOLOCK(isrv, SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST,
-			nasid, widget, __pa(war_list), 0, 0, 0 ,0);
-	if (isrv.status)
-		panic("sn_device_fixup_war failed: %s\n",
-		      ia64_sal_strerror(isrv.status));
-
-	dev_entry = war_list + device;
-	memcpy(common,dev_entry, sizeof(*common));
-	kfree(war_list);
-
-	return isrv.status;
-}
 
 /*
- * sn_fixup_ionodes() - This routine initializes the HUB data strcuture for
- *	each node in the system.
+ * sn_fixup_ionodes() - This routine initializes the HUB data structure for
+ *			each node in the system. This function is only
+ *			executed when running with a non-ACPI capable PROM.
  */
 static void __init sn_fixup_ionodes(void)
 {
-	struct sn_flush_device_kernel *sn_flush_device_kernel;
-	struct sn_flush_device_kernel *dev_entry;
+
 	struct hubdev_info *hubdev;
 	u64 status;
 	u64 nasid;
-	int i, widget, device, size;
+	int i;
+	extern void sn_common_hubdev_init(struct hubdev_info *);
 
 	/*
 	 * Get SGI Specific HUB chipset information.
@@ -240,70 +92,47 @@ static void __init sn_fixup_ionodes(void)
 			max_segment_number = hubdev->max_segment_number;
 			max_pcibus_number = hubdev->max_pcibus_number;
 		}
+		sn_common_hubdev_init(hubdev);
+	}
+}
 
-		/* Attach the error interrupt handlers */
-		if (nasid & 1)
-			ice_error_init(hubdev);
-		else
-			hub_error_init(hubdev);
-
-		for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++)
-			hubdev->hdi_xwidget_info[widget].xwi_hubinfo = hubdev;
-
-		if (!hubdev->hdi_flush_nasid_list.widget_p)
-			continue;
-
-		size = (HUB_WIDGET_ID_MAX + 1) *
-			sizeof(struct sn_flush_device_kernel *);
-		hubdev->hdi_flush_nasid_list.widget_p =
-			kzalloc(size, GFP_KERNEL);
-		if (!hubdev->hdi_flush_nasid_list.widget_p)
+/*
+ * sn_pci_legacy_window_fixup - Create PCI controller windows for
+ *				legacy IO and MEM space. This needs to
+ *				be done here, as the PROM does not have
+ *				ACPI support defining the root buses
+ *				and their resources (_CRS),
+ */
+static void
+sn_legacy_pci_window_fixup(struct pci_controller *controller,
+			   u64 legacy_io, u64 legacy_mem)
+{
+		controller->window = kcalloc(2, sizeof(struct pci_window),
+					     GFP_KERNEL);
+		if (controller->window == NULL)
 			BUG();
-
-		for (widget = 0; widget <= HUB_WIDGET_ID_MAX; widget++) {
-			size = DEV_PER_WIDGET *
-				sizeof(struct sn_flush_device_kernel);
-			sn_flush_device_kernel = kzalloc(size, GFP_KERNEL);
-			if (!sn_flush_device_kernel)
-				BUG();
-
-			dev_entry = sn_flush_device_kernel;
-			for (device = 0; device < DEV_PER_WIDGET;
-			     device++,dev_entry++) {
-				size = sizeof(struct sn_flush_device_common);
-				dev_entry->common = kzalloc(size, GFP_KERNEL);
-				if (!dev_entry->common)
-					BUG();
-
-				if (sn_prom_feature_available(
-						       PRF_DEVICE_FLUSH_LIST))
-					status = sal_get_device_dmaflush_list(
-						     nasid, widget, device,
-						     (u64)(dev_entry->common));
-				else
-					status = sn_device_fixup_war(nasid,
-						     widget, device,
-						     dev_entry->common);
-				if (status != SALRET_OK)
-					panic("SAL call failed: %s\n",
-					      ia64_sal_strerror(status));
-
-				spin_lock_init(&dev_entry->sfdl_flush_lock);
-			}
-
-			if (sn_flush_device_kernel)
-				hubdev->hdi_flush_nasid_list.widget_p[widget] =
-						       sn_flush_device_kernel;
-	        }
-	}
+		controller->window[0].offset = legacy_io;
+		controller->window[0].resource.name = "legacy_io";
+		controller->window[0].resource.flags = IORESOURCE_IO;
+		controller->window[0].resource.start = legacy_io;
+		controller->window[0].resource.end =
+	    			controller->window[0].resource.start + 0xffff;
+		controller->window[0].resource.parent = &ioport_resource;
+		controller->window[1].offset = legacy_mem;
+		controller->window[1].resource.name = "legacy_mem";
+		controller->window[1].resource.flags = IORESOURCE_MEM;
+		controller->window[1].resource.start = legacy_mem;
+		controller->window[1].resource.end =
+	    	       controller->window[1].resource.start + (1024 * 1024) - 1;
+		controller->window[1].resource.parent = &iomem_resource;
+		controller->windows = 2;
 }
 
 /*
  * sn_pci_window_fixup() - Create a pci_window for each device resource.
- *			   Until ACPI support is added, we need this code
- *			   to setup pci_windows for use by
- *			   pcibios_bus_to_resource(),
- *			   pcibios_resource_to_bus(), etc.
+ *			   It will setup pci_windows for use by
+ *			   pcibios_bus_to_resource(), pcibios_resource_to_bus(),
+ *			   etc.
  */
 static void
 sn_pci_window_fixup(struct pci_dev *dev, unsigned int count,
@@ -342,60 +171,22 @@ sn_pci_window_fixup(struct pci_dev *dev, unsigned int count,
 	controller->window = new_window;
 }
 
-void sn_pci_unfixup_slot(struct pci_dev *dev)
-{
-	struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev;
-
-	sn_irq_unfixup(dev);
-	pci_dev_put(host_pci_dev);
-	pci_dev_put(dev);
-}
-
 /*
- * sn_pci_fixup_slot() - This routine sets up a slot's resources
- * consistent with the Linux PCI abstraction layer.  Resources acquired
- * from our PCI provider include PIO maps to BAR space and interrupt
- * objects.
+ * sn_more_slot_fixup() - We are not running with an ACPI capable PROM,
+ *			  and need to convert the pci_dev->resource
+ *			  'start' and 'end' addresses to mapped addresses,
+ *			  and setup the pci_controller->window array entries.
  */
-void sn_pci_fixup_slot(struct pci_dev *dev)
+void
+sn_more_slot_fixup(struct pci_dev *dev, struct pcidev_info *pcidev_info)
 {
 	unsigned int count = 0;
 	int idx;
-	int segment = pci_domain_nr(dev->bus);
-	int status = 0;
-	struct pcibus_bussoft *bs;
- 	struct pci_bus *host_pci_bus;
- 	struct pci_dev *host_pci_dev;
-	struct pcidev_info *pcidev_info;
 	s64 pci_addrs[PCI_ROM_RESOURCE + 1];
- 	struct sn_irq_info *sn_irq_info;
- 	unsigned long size;
- 	unsigned int bus_no, devfn;
-
-	pci_dev_get(dev); /* for the sysdata pointer */
-	pcidev_info = kzalloc(sizeof(struct pcidev_info), GFP_KERNEL);
-	if (!pcidev_info)
-		BUG();		/* Cannot afford to run out of memory */
-
-	sn_irq_info = kzalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
-	if (!sn_irq_info)
-		BUG();		/* Cannot afford to run out of memory */
-
-	/* Call to retrieve pci device information needed by kernel. */
-	status = sal_get_pcidev_info((u64) segment, (u64) dev->bus->number, 
-				     dev->devfn,
-				     (u64) __pa(pcidev_info),
-				     (u64) __pa(sn_irq_info));
-	if (status)
-		BUG(); /* Cannot get platform pci device information */
-
-	/* Add pcidev_info to list in sn_pci_controller struct */
-	list_add_tail(&pcidev_info->pdi_list,
-		      &(SN_PCI_CONTROLLER(dev->bus)->pcidev_info));
+	unsigned long addr, end, size, start;
 
 	/* Copy over PIO Mapped Addresses */
 	for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) {
-		unsigned long start, end, addr;
 
 		if (!pcidev_info->pdi_pio_mapped_addr[idx]) {
 			pci_addrs[idx] = -1;
@@ -419,60 +210,28 @@ void sn_pci_fixup_slot(struct pci_dev *dev)
 			dev->resource[idx].parent = &ioport_resource;
 		else
 			dev->resource[idx].parent = &iomem_resource;
+		/* If ROM, mark as shadowed in PROM */
+		if (idx == PCI_ROM_RESOURCE)
+			dev->resource[idx].flags |= IORESOURCE_ROM_BIOS_COPY;
 	}
 	/* Create a pci_window in the pci_controller struct for
 	 * each device resource.
 	 */
 	if (count > 0)
 		sn_pci_window_fixup(dev, count, pci_addrs);
-
-	/*
-	 * Using the PROMs values for the PCI host bus, get the Linux
- 	 * PCI host_pci_dev struct and set up host bus linkages
- 	 */
-
-	bus_no = (pcidev_info->pdi_slot_host_handle >> 32) & 0xff;
-	devfn = pcidev_info->pdi_slot_host_handle & 0xffffffff;
- 	host_pci_bus = pci_find_bus(segment, bus_no);
- 	host_pci_dev = pci_get_slot(host_pci_bus, devfn);
-
-	pcidev_info->host_pci_dev = host_pci_dev;
-	pcidev_info->pdi_linux_pcidev = dev;
-	pcidev_info->pdi_host_pcidev_info = SN_PCIDEV_INFO(host_pci_dev);
-	bs = SN_PCIBUS_BUSSOFT(dev->bus);
-	pcidev_info->pdi_pcibus_info = bs;
-
-	if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
-		SN_PCIDEV_BUSPROVIDER(dev) = sn_pci_provider[bs->bs_asic_type];
-	} else {
-		SN_PCIDEV_BUSPROVIDER(dev) = &sn_pci_default_provider;
-	}
-
-	/* Only set up IRQ stuff if this device has a host bus context */
-	if (bs && sn_irq_info->irq_irq) {
-		pcidev_info->pdi_sn_irq_info = sn_irq_info;
-		dev->irq = pcidev_info->pdi_sn_irq_info->irq_irq;
-		sn_irq_fixup(dev, sn_irq_info);
-	} else {
-		pcidev_info->pdi_sn_irq_info = NULL;
-		kfree(sn_irq_info);
-	}
 }
 
 /*
  * sn_pci_controller_fixup() - This routine sets up a bus's resources
- * consistent with the Linux PCI abstraction layer.
+ *			       consistent with the Linux PCI abstraction layer.
  */
-void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
+static void
+sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
 {
-	int status;
-	int nasid, cnode;
+	s64 status = 0;
 	struct pci_controller *controller;
-	struct sn_pci_controller *sn_controller;
 	struct pcibus_bussoft *prom_bussoft_ptr;
-	struct hubdev_info *hubdev_info;
-	void *provider_soft;
-	struct sn_pcibus_provider *provider;
+
 
  	status = sal_get_pcibus_info((u64) segment, (u64) busnum,
  				     (u64) ia64_tpa(&prom_bussoft_ptr));
@@ -480,261 +239,77 @@ void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
 		return;		/*bus # does not exist */
 	prom_bussoft_ptr = __va(prom_bussoft_ptr);
 
-	/* Allocate a sn_pci_controller, which has a pci_controller struct
-	 * as the first member.
-	 */
-	sn_controller = kzalloc(sizeof(struct sn_pci_controller), GFP_KERNEL);
-	if (!sn_controller)
+	controller = kzalloc(sizeof(*controller), GFP_KERNEL);
+	if (!controller)
 		BUG();
-	INIT_LIST_HEAD(&sn_controller->pcidev_info);
-	controller = &sn_controller->pci_controller;
 	controller->segment = segment;
 
-	if (bus == NULL) {
- 		bus = pci_scan_bus(busnum, &pci_root_ops, controller);
- 		if (bus == NULL)
- 			goto error_return; /* error, or bus already scanned */
- 		bus->sysdata = NULL;
-	}
-
-	if (bus->sysdata)
-		goto error_return; /* sysdata already alloc'd */
-
 	/*
-	 * Per-provider fixup.  Copies the contents from prom to local
-	 * area and links SN_PCIBUS_BUSSOFT().
+	 * Temporarily save the prom_bussoft_ptr for use by sn_bus_fixup().
+	 * (platform_data will be overwritten later in sn_common_bus_fixup())
 	 */
+	controller->platform_data = prom_bussoft_ptr;
 
-	if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES)
-		goto error_return; /* unsupported asic type */
-
-	if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
-		goto error_return; /* no further fixup necessary */
-
-	provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
-	if (provider == NULL)
-		goto error_return; /* no provider registerd for this asic */
+	bus = pci_scan_bus(busnum, &pci_root_ops, controller);
+ 	if (bus == NULL)
+ 		goto error_return; /* error, or bus already scanned */
 
 	bus->sysdata = controller;
-	if (provider->bus_fixup)
-		provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr, controller);
-	else
-		provider_soft = NULL;
-
-	if (provider_soft == NULL) {
-		/* fixup failed or not applicable */
-		bus->sysdata = NULL;
-		goto error_return;
-	}
-
-	/*
-	 * Setup pci_windows for legacy IO and MEM space.
-	 * (Temporary until ACPI support is in place.)
-	 */
-	controller->window = kcalloc(2, sizeof(struct pci_window), GFP_KERNEL);
-	if (controller->window == NULL)
-		BUG();
-	controller->window[0].offset = prom_bussoft_ptr->bs_legacy_io;
-	controller->window[0].resource.name = "legacy_io";
-	controller->window[0].resource.flags = IORESOURCE_IO;
-	controller->window[0].resource.start = prom_bussoft_ptr->bs_legacy_io;
-	controller->window[0].resource.end =
-	    controller->window[0].resource.start + 0xffff;
-	controller->window[0].resource.parent = &ioport_resource;
-	controller->window[1].offset = prom_bussoft_ptr->bs_legacy_mem;
-	controller->window[1].resource.name = "legacy_mem";
-	controller->window[1].resource.flags = IORESOURCE_MEM;
-	controller->window[1].resource.start = prom_bussoft_ptr->bs_legacy_mem;
-	controller->window[1].resource.end =
-	    controller->window[1].resource.start + (1024 * 1024) - 1;
-	controller->window[1].resource.parent = &iomem_resource;
-	controller->windows = 2;
-
-	/*
-	 * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
-	 * after this point.
-	 */
-
-	PCI_CONTROLLER(bus)->platform_data = provider_soft;
-	nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
-	cnode = nasid_to_cnodeid(nasid);
-	hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
-	SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
-	    &(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
 
-	/*
-	 * If the node information we obtained during the fixup phase is invalid
-	 * then set controller->node to -1 (undetermined)
-	 */
-	if (controller->node >= num_online_nodes()) {
-		struct pcibus_bussoft *b = SN_PCIBUS_BUSSOFT(bus);
-
-		printk(KERN_WARNING "Device ASIC=%u XID=%u PBUSNUM=%u"
-				    "L_IO=%lx L_MEM=%lx BASE=%lx\n",
-			b->bs_asic_type, b->bs_xid, b->bs_persist_busnum,
-			b->bs_legacy_io, b->bs_legacy_mem, b->bs_base);
-		printk(KERN_WARNING "on node %d but only %d nodes online."
-			"Association set to undetermined.\n",
-			controller->node, num_online_nodes());
-		controller->node = -1;
-	}
 	return;
 
 error_return:
 
-	kfree(sn_controller);
+	kfree(controller);
 	return;
 }
 
-void sn_bus_store_sysdata(struct pci_dev *dev)
+/*
+ * sn_bus_fixup
+ */
+void
+sn_bus_fixup(struct pci_bus *bus)
 {
-	struct sysdata_el *element;
-
-	element = kzalloc(sizeof(struct sysdata_el), GFP_KERNEL);
-	if (!element) {
-		dev_dbg(dev, "%s: out of memory!\n", __FUNCTION__);
-		return;
-	}
-	element->sysdata = SN_PCIDEV_INFO(dev);
-	list_add(&element->entry, &sn_sysdata_list);
-}
+	struct pci_dev *pci_dev = NULL;
+	struct pcibus_bussoft *prom_bussoft_ptr;
+	extern void sn_common_bus_fixup(struct pci_bus *,
+					struct pcibus_bussoft *);
+
+
+	if (!bus->parent) {  /* If root bus */
+		prom_bussoft_ptr = PCI_CONTROLLER(bus)->platform_data;
+		if (prom_bussoft_ptr == NULL) {
+			printk(KERN_ERR
+			       "sn_bus_fixup: 0x%04x:0x%02x Unable to "
+			       "obtain prom_bussoft_ptr\n",
+			       pci_domain_nr(bus), bus->number);
+			return;
+		}
+		sn_common_bus_fixup(bus, prom_bussoft_ptr);
+		sn_legacy_pci_window_fixup(PCI_CONTROLLER(bus),
+					   prom_bussoft_ptr->bs_legacy_io,
+					   prom_bussoft_ptr->bs_legacy_mem);
+        }
+        list_for_each_entry(pci_dev, &bus->devices, bus_list) {
+                sn_pci_fixup_slot(pci_dev);
+        }
 
-void sn_bus_free_sysdata(void)
-{
-	struct sysdata_el *element;
-	struct list_head *list, *safe;
-
-	list_for_each_safe(list, safe, &sn_sysdata_list) {
-		element = list_entry(list, struct sysdata_el, entry);
-		list_del(&element->entry);
-		list_del(&(((struct pcidev_info *)
-			     (element->sysdata))->pdi_list));
-		kfree(element->sysdata);
-		kfree(element);
-	}
-	return;
 }
 
 /*
- * Ugly hack to get PCI setup until we have a proper ACPI namespace.
+ * sn_io_init - PROM does not have ACPI support to define nodes or root buses,
+ *		so we need to do things the hard way, including initiating the
+ *		bus scanning ourselves.
  */
 
-#define PCI_BUSES_TO_SCAN 256
-
-static int __init sn_pci_init(void)
+void __init sn_io_init(void)
 {
 	int i, j;
-	struct pci_dev *pci_dev = NULL;
-
-	if (!ia64_platform_is("sn2") || IS_RUNNING_ON_FAKE_PROM())
-		return 0;
-
-	/*
-	 * prime sn_pci_provider[].  Individial provider init routines will
-	 * override their respective default entries.
-	 */
-
-	for (i = 0; i < PCIIO_ASIC_MAX_TYPES; i++)
-		sn_pci_provider[i] = &sn_pci_default_provider;
 
-	pcibr_init_provider();
-	tioca_init_provider();
-	tioce_init_provider();
-
-	/*
-	 * This is needed to avoid bounce limit checks in the blk layer
-	 */
-	ia64_max_iommu_merge_mask = ~PAGE_MASK;
 	sn_fixup_ionodes();
-	sn_irq_lh_init();
-	INIT_LIST_HEAD(&sn_sysdata_list);
-	sn_init_cpei_timer();
-
-#ifdef CONFIG_PROC_FS
-	register_sn_procfs();
-#endif
 
 	/* busses are not known yet ... */
 	for (i = 0; i <= max_segment_number; i++)
 		for (j = 0; j <= max_pcibus_number; j++)
 			sn_pci_controller_fixup(i, j, NULL);
-
-	/*
-	 * Generic Linux PCI Layer has created the pci_bus and pci_dev 
-	 * structures - time for us to add our SN PLatform specific 
-	 * information.
-	 */
-
-	while ((pci_dev =
-		pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pci_dev)) != NULL)
-		sn_pci_fixup_slot(pci_dev);
-
-	sn_ioif_inited = 1;	/* sn I/O infrastructure now initialized */
-
-	return 0;
-}
-
-/*
- * hubdev_init_node() - Creates the HUB data structure and link them to it's 
- *	own NODE specific data area.
- */
-void hubdev_init_node(nodepda_t * npda, cnodeid_t node)
-{
-	struct hubdev_info *hubdev_info;
-	int size;
-	pg_data_t *pg;
-
-	size = sizeof(struct hubdev_info);
-
-	if (node >= num_online_nodes())	/* Headless/memless IO nodes */
-		pg = NODE_DATA(0);
-	else
-		pg = NODE_DATA(node);
-
-	hubdev_info = (struct hubdev_info *)alloc_bootmem_node(pg, size);
-
-	npda->pdinfo = (void *)hubdev_info;
 }
-
-geoid_t
-cnodeid_get_geoid(cnodeid_t cnode)
-{
-	struct hubdev_info *hubdev;
-
-	hubdev = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
-	return hubdev->hdi_geoid;
-}
-
-void sn_generate_path(struct pci_bus *pci_bus, char *address)
-{
-	nasid_t nasid;
-	cnodeid_t cnode;
-	geoid_t geoid;
-	moduleid_t moduleid;
-	u16 bricktype;
-
-	nasid = NASID_GET(SN_PCIBUS_BUSSOFT(pci_bus)->bs_base);
-	cnode = nasid_to_cnodeid(nasid);
-	geoid = cnodeid_get_geoid(cnode);
-	moduleid = geo_module(geoid);
-
-	sprintf(address, "module_%c%c%c%c%.2d",
-		'0'+RACK_GET_CLASS(MODULE_GET_RACK(moduleid)),
-		'0'+RACK_GET_GROUP(MODULE_GET_RACK(moduleid)),
-		'0'+RACK_GET_NUM(MODULE_GET_RACK(moduleid)),
-		MODULE_GET_BTCHAR(moduleid), MODULE_GET_BPOS(moduleid));
-
-	/* Tollhouse requires slot id to be displayed */
-	bricktype = MODULE_GET_BTYPE(moduleid);
-	if ((bricktype == L1_BRICKTYPE_191010) ||
-	    (bricktype == L1_BRICKTYPE_1932))
-			sprintf(address, "%s^%d", address, geo_slot(geoid));
-}
-
-subsys_initcall(sn_pci_init);
-EXPORT_SYMBOL(sn_pci_fixup_slot);
-EXPORT_SYMBOL(sn_pci_unfixup_slot);
-EXPORT_SYMBOL(sn_pci_controller_fixup);
-EXPORT_SYMBOL(sn_bus_store_sysdata);
-EXPORT_SYMBOL(sn_bus_free_sysdata);
-EXPORT_SYMBOL(sn_generate_path);
diff --git a/arch/ia64/sn/kernel/iomv.c b/arch/ia64/sn/kernel/iomv.c
index 7ce3cdad627..4aa4f301d56 100644
--- a/arch/ia64/sn/kernel/iomv.c
+++ b/arch/ia64/sn/kernel/iomv.c
@@ -3,10 +3,11 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2000-2003 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2000-2003, 2006 Silicon Graphics, Inc. All rights reserved.
  */
 
 #include <linux/module.h>
+#include <linux/acpi.h>
 #include <asm/io.h>
 #include <asm/delay.h>
 #include <asm/vga.h>
@@ -15,6 +16,7 @@
 #include <asm/sn/pda.h>
 #include <asm/sn/sn_cpuid.h>
 #include <asm/sn/shub_mmr.h>
+#include <asm/sn/acpi.h>
 
 #define IS_LEGACY_VGA_IOPORT(p) \
 	(((p) >= 0x3b0 && (p) <= 0x3bb) || ((p) >= 0x3c0 && (p) <= 0x3df))
@@ -31,11 +33,14 @@ void *sn_io_addr(unsigned long port)
 {
 	if (!IS_RUNNING_ON_SIMULATOR()) {
 		if (IS_LEGACY_VGA_IOPORT(port))
-			port += vga_console_iobase;
+			return (__ia64_mk_io_addr(port));
 		/* On sn2, legacy I/O ports don't point at anything */
 		if (port < (64 * 1024))
 			return NULL;
-		return ((void *)(port | __IA64_UNCACHED_OFFSET));
+		if (SN_ACPI_BASE_SUPPORT())
+			return (__ia64_mk_io_addr(port));
+		else
+			return ((void *)(port | __IA64_UNCACHED_OFFSET));
 	} else {
 		/* but the simulator uses them... */
 		unsigned long addr;
diff --git a/arch/ia64/sn/kernel/setup.c b/arch/ia64/sn/kernel/setup.c
index 7a2d824c5ce..1d009f93244 100644
--- a/arch/ia64/sn/kernel/setup.c
+++ b/arch/ia64/sn/kernel/setup.c
@@ -388,6 +388,14 @@ void __init sn_setup(char **cmdline_p)
 	ia64_sn_plat_set_error_handling_features();	// obsolete
 	ia64_sn_set_os_feature(OSF_MCA_SLV_TO_OS_INIT_SLV);
 	ia64_sn_set_os_feature(OSF_FEAT_LOG_SBES);
+	/*
+	 * Note: The calls to notify the PROM of ACPI and PCI Segment
+	 *	 support must be done prior to acpi_load_tables(), as
+	 *	 an ACPI capable PROM will rebuild the DSDT as result
+	 *	 of the call.
+	 */
+	ia64_sn_set_os_feature(OSF_PCISEGMENT_ENABLE);
+	ia64_sn_set_os_feature(OSF_ACPI_ENABLE);
 
 
 #if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
@@ -413,6 +421,16 @@ void __init sn_setup(char **cmdline_p)
 	if (! vga_console_membase)
 		sn_scan_pcdp();
 
+	/*
+	 *	Setup legacy IO space.
+	 *	vga_console_iobase maps to PCI IO Space address 0 on the
+	 * 	bus containing the VGA console.
+	 */
+	if (vga_console_iobase) {
+		io_space[0].mmio_base = vga_console_iobase;
+		io_space[0].sparse = 0;
+	}
+
 	if (vga_console_membase) {
 		/* usable vga ... make tty0 the preferred default console */
 		if (!strstr(*cmdline_p, "console="))
diff --git a/arch/ia64/sn/kernel/tiocx.c b/arch/ia64/sn/kernel/tiocx.c
index feaf1a6e810..493380b2c05 100644
--- a/arch/ia64/sn/kernel/tiocx.c
+++ b/arch/ia64/sn/kernel/tiocx.c
@@ -552,7 +552,7 @@ static void __exit tiocx_exit(void)
 	bus_unregister(&tiocx_bus_type);
 }
 
-subsys_initcall(tiocx_init);
+fs_initcall(tiocx_init);
 module_exit(tiocx_exit);
 
 /************************************************************************
diff --git a/arch/ia64/sn/pci/pcibr/pcibr_provider.c b/arch/ia64/sn/pci/pcibr/pcibr_provider.c
index 27dd7df0f44..6846dc9b432 100644
--- a/arch/ia64/sn/pci/pcibr/pcibr_provider.c
+++ b/arch/ia64/sn/pci/pcibr/pcibr_provider.c
@@ -3,7 +3,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2001-2004 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2001-2004, 2006 Silicon Graphics, Inc. All rights reserved.
  */
 
 #include <linux/interrupt.h>
@@ -109,7 +109,6 @@ void *
 pcibr_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *controller)
 {
 	int nasid, cnode, j;
-	cnodeid_t near_cnode;
 	struct hubdev_info *hubdev_info;
 	struct pcibus_info *soft;
 	struct sn_flush_device_kernel *sn_flush_device_kernel;
@@ -186,20 +185,6 @@ pcibr_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *cont
 		return NULL;
 	}
 
-	if (prom_bussoft->bs_asic_type == PCIIO_ASIC_TYPE_TIOCP) {
-		/* TIO PCI Bridge: find nearest node with CPUs */
-		int e = sn_hwperf_get_nearest_node(cnode, NULL, &near_cnode);
-
-		if (e < 0) {
-			near_cnode = (cnodeid_t)-1; /* use any node */
-			printk(KERN_WARNING "pcibr_bus_fixup: failed to find "
-				"near node with CPUs to TIO node %d, err=%d\n",
-				cnode, e);
-		}
-		controller->node = near_cnode;
-	}
-	else
-		controller->node = cnode;
 	return soft;
 }
 
diff --git a/arch/ia64/sn/pci/tioce_provider.c b/arch/ia64/sn/pci/tioce_provider.c
index 46e16dcf597..35f854fb612 100644
--- a/arch/ia64/sn/pci/tioce_provider.c
+++ b/arch/ia64/sn/pci/tioce_provider.c
@@ -15,7 +15,6 @@
 #include <asm/sn/pcidev.h>
 #include <asm/sn/pcibus_provider_defs.h>
 #include <asm/sn/tioce_provider.h>
-#include <asm/sn/sn2/sn_hwperf.h>
 
 /*
  * 1/26/2006
@@ -990,8 +989,6 @@ tioce_target_interrupt(struct sn_irq_info *sn_irq_info)
 static void *
 tioce_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *controller)
 {
-	int my_nasid;
-	cnodeid_t my_cnode, mem_cnode;
 	struct tioce_common *tioce_common;
 	struct tioce_kernel *tioce_kern;
 	struct tioce __iomem *tioce_mmr;
@@ -1035,21 +1032,6 @@ tioce_bus_fixup(struct pcibus_bussoft *prom_bussoft, struct pci_controller *cont
 		       tioce_common->ce_pcibus.bs_persist_segment,
 		       tioce_common->ce_pcibus.bs_persist_busnum);
 
-	/*
-	 * identify closest nasid for memory allocations
-	 */
-
-	my_nasid = NASID_GET(tioce_common->ce_pcibus.bs_base);
-	my_cnode = nasid_to_cnodeid(my_nasid);
-
-	if (sn_hwperf_get_nearest_node(my_cnode, &mem_cnode, NULL) < 0) {
-		printk(KERN_WARNING "tioce_bus_fixup: failed to find "
-		       "closest node with MEM to TIO node %d\n", my_cnode);
-		mem_cnode = (cnodeid_t)-1; /* use any node */
-	}
-
-	controller->node = mem_cnode;
-
 	return tioce_common;
 }
 
diff --git a/arch/powerpc/platforms/powermac/pci.c b/arch/powerpc/platforms/powermac/pci.c
index 9923adc5248..257dc906846 100644
--- a/arch/powerpc/platforms/powermac/pci.c
+++ b/arch/powerpc/platforms/powermac/pci.c
@@ -48,7 +48,6 @@ static struct pci_controller *u3_ht;
 static int has_second_ohare;
 #endif /* CONFIG_PPC64 */
 
-extern u8 pci_cache_line_size;
 extern int pcibios_assign_bus_offset;
 
 struct device_node *k2_skiplist[2];
diff --git a/arch/sparc64/kernel/pci.c b/arch/sparc64/kernel/pci.c
index e02f01b644a..dfc41cd4bb5 100644
--- a/arch/sparc64/kernel/pci.c
+++ b/arch/sparc64/kernel/pci.c
@@ -646,13 +646,4 @@ int pci_domain_nr(struct pci_bus *pbus)
 }
 EXPORT_SYMBOL(pci_domain_nr);
 
-int pcibios_prep_mwi(struct pci_dev *dev)
-{
-	/* We set correct PCI_CACHE_LINE_SIZE register values for every
-	 * device probed on this platform.  So there is nothing to check
-	 * and this always succeeds.
-	 */
-	return 0;
-}
-
 #endif /* !(CONFIG_PCI) */
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index 510816c16da..04bee524e31 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -125,6 +125,7 @@ config I2C_I801
 	    ICH7
 	    ESB2
 	    ICH8
+	    ICH9
 
 	  This driver can also be built as a module.  If so, the module
 	  will be called i2c-i801.
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index bbb2fbee836..c7be2fdbd86 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -33,6 +33,7 @@
     ICH7		27DA
     ESB2		269B
     ICH8		283E
+    ICH9		2930
     This driver supports several versions of Intel's I/O Controller Hubs (ICH).
     For SMBus support, they are similar to the PIIX4 and are part
     of Intel's '810' and other chipsets.
@@ -457,6 +458,7 @@ static struct pci_device_id i801_ids[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_17) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_17) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_5) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_6) },
 	{ 0, }
 };
 
diff --git a/drivers/message/i2o/pci.c b/drivers/message/i2o/pci.c
index 62f1ac08332..8287f95c8c4 100644
--- a/drivers/message/i2o/pci.c
+++ b/drivers/message/i2o/pci.c
@@ -320,7 +320,6 @@ static int __devinit i2o_pci_probe(struct pci_dev *pdev,
 	struct i2o_controller *c;
 	int rc;
 	struct pci_dev *i960 = NULL;
-	int enabled = pdev->is_enabled;
 
 	printk(KERN_INFO "i2o: Checking for PCI I2O controllers...\n");
 
@@ -330,12 +329,11 @@ static int __devinit i2o_pci_probe(struct pci_dev *pdev,
 		return -ENODEV;
 	}
 
-	if (!enabled)
-		if ((rc = pci_enable_device(pdev))) {
-			printk(KERN_WARNING "i2o: couldn't enable device %s\n",
-			       pci_name(pdev));
-			return rc;
-		}
+	if ((rc = pci_enable_device(pdev))) {
+		printk(KERN_WARNING "i2o: couldn't enable device %s\n",
+		       pci_name(pdev));
+		return rc;
+	}
 
 	if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
 		printk(KERN_WARNING "i2o: no suitable DMA found for %s\n",
@@ -442,8 +440,7 @@ static int __devinit i2o_pci_probe(struct pci_dev *pdev,
 	i2o_iop_free(c);
 
       disable:
-	if (!enabled)
-		pci_disable_device(pdev);
+	pci_disable_device(pdev);
 
 	return rc;
 }
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index 3cfb0a3575e..f1dd81a1d59 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -19,7 +19,7 @@ config PCI_MSI
 
 config PCI_MULTITHREAD_PROBE
 	bool "PCI Multi-threaded probe (EXPERIMENTAL)"
-	depends on PCI && EXPERIMENTAL && BROKEN
+	depends on PCI && EXPERIMENTAL
 	help
 	  Say Y here if you want the PCI core to spawn a new thread for
 	  every PCI device that is probed.  This can cause a huge
diff --git a/drivers/pci/access.c b/drivers/pci/access.c
index ea16805a153..73a58c73d52 100644
--- a/drivers/pci/access.c
+++ b/drivers/pci/access.c
@@ -1,6 +1,7 @@
 #include <linux/pci.h>
 #include <linux/module.h>
 #include <linux/ioport.h>
+#include <linux/wait.h>
 
 #include "pci.h"
 
@@ -63,30 +64,42 @@ EXPORT_SYMBOL(pci_bus_write_config_byte);
 EXPORT_SYMBOL(pci_bus_write_config_word);
 EXPORT_SYMBOL(pci_bus_write_config_dword);
 
-static u32 pci_user_cached_config(struct pci_dev *dev, int pos)
-{
-	u32 data;
+/*
+ * The following routines are to prevent the user from accessing PCI config
+ * space when it's unsafe to do so.  Some devices require this during BIST and
+ * we're required to prevent it during D-state transitions.
+ *
+ * We have a bit per device to indicate it's blocked and a global wait queue
+ * for callers to sleep on until devices are unblocked.
+ */
+static DECLARE_WAIT_QUEUE_HEAD(pci_ucfg_wait);
 
-	data = dev->saved_config_space[pos/sizeof(dev->saved_config_space[0])];
-	data >>= (pos % sizeof(dev->saved_config_space[0])) * 8;
-	return data;
+static noinline void pci_wait_ucfg(struct pci_dev *dev)
+{
+	DECLARE_WAITQUEUE(wait, current);
+
+	__add_wait_queue(&pci_ucfg_wait, &wait);
+	do {
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		spin_unlock_irq(&pci_lock);
+		schedule();
+		spin_lock_irq(&pci_lock);
+	} while (dev->block_ucfg_access);
+	__remove_wait_queue(&pci_ucfg_wait, &wait);
 }
 
 #define PCI_USER_READ_CONFIG(size,type)					\
 int pci_user_read_config_##size						\
 	(struct pci_dev *dev, int pos, type *val)			\
 {									\
-	unsigned long flags;						\
 	int ret = 0;							\
 	u32 data = -1;							\
 	if (PCI_##size##_BAD) return PCIBIOS_BAD_REGISTER_NUMBER;	\
-	spin_lock_irqsave(&pci_lock, flags);				\
-	if (likely(!dev->block_ucfg_access))				\
-		ret = dev->bus->ops->read(dev->bus, dev->devfn,		\
+	spin_lock_irq(&pci_lock);					\
+	if (unlikely(dev->block_ucfg_access)) pci_wait_ucfg(dev);	\
+	ret = dev->bus->ops->read(dev->bus, dev->devfn,			\
 					pos, sizeof(type), &data);	\
-	else if (pos < sizeof(dev->saved_config_space))			\
-		data = pci_user_cached_config(dev, pos); 		\
-	spin_unlock_irqrestore(&pci_lock, flags);			\
+	spin_unlock_irq(&pci_lock);					\
 	*val = (type)data;						\
 	return ret;							\
 }
@@ -95,14 +108,13 @@ int pci_user_read_config_##size						\
 int pci_user_write_config_##size					\
 	(struct pci_dev *dev, int pos, type val)			\
 {									\
-	unsigned long flags;						\
 	int ret = -EIO;							\
 	if (PCI_##size##_BAD) return PCIBIOS_BAD_REGISTER_NUMBER;	\
-	spin_lock_irqsave(&pci_lock, flags);				\
-	if (likely(!dev->block_ucfg_access))				\
-		ret = dev->bus->ops->write(dev->bus, dev->devfn,	\
+	spin_lock_irq(&pci_lock);					\
+	if (unlikely(dev->block_ucfg_access)) pci_wait_ucfg(dev);	\
+	ret = dev->bus->ops->write(dev->bus, dev->devfn,		\
 					pos, sizeof(type), val);	\
-	spin_unlock_irqrestore(&pci_lock, flags);			\
+	spin_unlock_irq(&pci_lock);					\
 	return ret;							\
 }
 
@@ -117,21 +129,23 @@ PCI_USER_WRITE_CONFIG(dword, u32)
  * pci_block_user_cfg_access - Block userspace PCI config reads/writes
  * @dev:	pci device struct
  *
- * This function blocks any userspace PCI config accesses from occurring.
- * When blocked, any writes will be bit bucketed and reads will return the
- * data saved using pci_save_state for the first 64 bytes of config
- * space and return 0xff for all other config reads.
- **/
+ * When user access is blocked, any reads or writes to config space will
+ * sleep until access is unblocked again.  We don't allow nesting of
+ * block/unblock calls.
+ */
 void pci_block_user_cfg_access(struct pci_dev *dev)
 {
 	unsigned long flags;
+	int was_blocked;
 
-	pci_save_state(dev);
-
-	/* spinlock to synchronize with anyone reading config space now */
 	spin_lock_irqsave(&pci_lock, flags);
+	was_blocked = dev->block_ucfg_access;
 	dev->block_ucfg_access = 1;
 	spin_unlock_irqrestore(&pci_lock, flags);
+
+	/* If we BUG() inside the pci_lock, we're guaranteed to hose
+	 * the machine */
+	BUG_ON(was_blocked);
 }
 EXPORT_SYMBOL_GPL(pci_block_user_cfg_access);
 
@@ -140,14 +154,19 @@ EXPORT_SYMBOL_GPL(pci_block_user_cfg_access);
  * @dev:	pci device struct
  *
  * This function allows userspace PCI config accesses to resume.
- **/
+ */
 void pci_unblock_user_cfg_access(struct pci_dev *dev)
 {
 	unsigned long flags;
 
-	/* spinlock to synchronize with anyone reading saved config space */
 	spin_lock_irqsave(&pci_lock, flags);
+
+	/* This indicates a problem in the caller, but we don't need
+	 * to kill them, unlike a double-block above. */
+	WARN_ON(!dev->block_ucfg_access);
+
 	dev->block_ucfg_access = 0;
+	wake_up_all(&pci_ucfg_wait);
 	spin_unlock_irqrestore(&pci_lock, flags);
 }
 EXPORT_SYMBOL_GPL(pci_unblock_user_cfg_access);
diff --git a/drivers/pci/hotplug/acpiphp.h b/drivers/pci/hotplug/acpiphp.h
index 59c5b242d86..ddbadd95387 100644
--- a/drivers/pci/hotplug/acpiphp.h
+++ b/drivers/pci/hotplug/acpiphp.h
@@ -62,10 +62,10 @@ struct acpiphp_slot;
 struct slot {
 	struct hotplug_slot	*hotplug_slot;
 	struct acpiphp_slot	*acpi_slot;
+	struct hotplug_slot_info info;
+	char name[SLOT_NAME_SIZE];
 };
 
-
-
 /**
  * struct acpiphp_bridge - PCI bridge information
  *
diff --git a/drivers/pci/hotplug/acpiphp_core.c b/drivers/pci/hotplug/acpiphp_core.c
index c57d9d5ce84..40c79b03c7e 100644
--- a/drivers/pci/hotplug/acpiphp_core.c
+++ b/drivers/pci/hotplug/acpiphp_core.c
@@ -303,25 +303,15 @@ static int __init init_acpi(void)
 	/* read initial number of slots */
 	if (!retval) {
 		num_slots = acpiphp_get_num_slots();
-		if (num_slots == 0)
+		if (num_slots == 0) {
+			acpiphp_glue_exit();
 			retval = -ENODEV;
+		}
 	}
 
 	return retval;
 }
 
-
-/**
- * make_slot_name - make a slot name that appears in pcihpfs
- * @slot: slot to name
- *
- */
-static void make_slot_name(struct slot *slot)
-{
-	snprintf(slot->hotplug_slot->name, SLOT_NAME_SIZE, "%u",
-		 slot->acpi_slot->sun);
-}
-
 /**
  * release_slot - free up the memory used by a slot
  * @hotplug_slot: slot to free
@@ -332,8 +322,6 @@ static void release_slot(struct hotplug_slot *hotplug_slot)
 
 	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 
-	kfree(slot->hotplug_slot->info);
-	kfree(slot->hotplug_slot->name);
 	kfree(slot->hotplug_slot);
 	kfree(slot);
 }
@@ -342,26 +330,19 @@ static void release_slot(struct hotplug_slot *hotplug_slot)
 int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot)
 {
 	struct slot *slot;
-	struct hotplug_slot *hotplug_slot;
-	struct hotplug_slot_info *hotplug_slot_info;
 	int retval = -ENOMEM;
 
 	slot = kzalloc(sizeof(*slot), GFP_KERNEL);
 	if (!slot)
 		goto error;
 
-	slot->hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL);
+	slot->hotplug_slot = kzalloc(sizeof(*slot->hotplug_slot), GFP_KERNEL);
 	if (!slot->hotplug_slot)
 		goto error_slot;
 
-	slot->hotplug_slot->info = kzalloc(sizeof(*hotplug_slot_info),
-					   GFP_KERNEL);
-	if (!slot->hotplug_slot->info)
-		goto error_hpslot;
+	slot->hotplug_slot->info = &slot->info;
 
-	slot->hotplug_slot->name = kzalloc(SLOT_NAME_SIZE, GFP_KERNEL);
-	if (!slot->hotplug_slot->name)
-		goto error_info;
+	slot->hotplug_slot->name = slot->name;
 
 	slot->hotplug_slot->private = slot;
 	slot->hotplug_slot->release = &release_slot;
@@ -376,21 +357,17 @@ int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot)
 	slot->hotplug_slot->info->cur_bus_speed = PCI_SPEED_UNKNOWN;
 
 	acpiphp_slot->slot = slot;
-	make_slot_name(slot);
+	snprintf(slot->name, sizeof(slot->name), "%u", slot->acpi_slot->sun);
 
 	retval = pci_hp_register(slot->hotplug_slot);
 	if (retval) {
 		err("pci_hp_register failed with error %d\n", retval);
-		goto error_name;
+		goto error_hpslot;
  	}
 
 	info("Slot [%s] registered\n", slot->hotplug_slot->name);
 
 	return 0;
-error_name:
-	kfree(slot->hotplug_slot->name);
-error_info:
-	kfree(slot->hotplug_slot->info);
 error_hpslot:
 	kfree(slot->hotplug_slot);
 error_slot:
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index 16167b01626..0b9d0db1590 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -1693,14 +1693,10 @@ void __exit acpiphp_glue_exit(void)
  */
 int __init acpiphp_get_num_slots(void)
 {
-	struct list_head *node;
 	struct acpiphp_bridge *bridge;
-	int num_slots;
-
-	num_slots = 0;
+	int num_slots = 0;
 
-	list_for_each (node, &bridge_list) {
-		bridge = (struct acpiphp_bridge *)node;
+	list_for_each_entry (bridge, &bridge_list, list) {
 		dbg("Bus %04x:%02x has %d slot%s\n",
 				pci_domain_nr(bridge->pci_bus),
 				bridge->pci_bus->number, bridge->nr_slots,
diff --git a/drivers/pci/hotplug/ibmphp_pci.c b/drivers/pci/hotplug/ibmphp_pci.c
index d87a9e3eaee..d8f05d7a3c7 100644
--- a/drivers/pci/hotplug/ibmphp_pci.c
+++ b/drivers/pci/hotplug/ibmphp_pci.c
@@ -1371,12 +1371,12 @@ static int unconfigure_boot_bridge (u8 busno, u8 device, u8 function)
 	}
 
 	bus = ibmphp_find_res_bus (sec_number);
-	debug ("bus->busno is %x\n", bus->busno);
-	debug ("sec_number is %x\n", sec_number);
 	if (!bus) {
 		err ("cannot find Bus structure for the bridged device\n");
 		return -EINVAL;
 	}
+	debug("bus->busno is %x\n", bus->busno);
+	debug("sec_number is %x\n", sec_number);
 
 	ibmphp_remove_bus (bus, busno);
 
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
index f93e81e2d2c..f13f31323e8 100644
--- a/drivers/pci/hotplug/pciehp_core.c
+++ b/drivers/pci/hotplug/pciehp_core.c
@@ -521,14 +521,9 @@ static void __exit unload_pciehpd(void)
 
 }
 
-static int hpdriver_context = 0;
-
 static void pciehp_remove (struct pcie_device *device)
 {
-	printk("%s ENTRY\n", __FUNCTION__);	
-	printk("%s -> Call free_irq for irq = %d\n",  
-		__FUNCTION__, device->irq);
-	free_irq(device->irq, &hpdriver_context);
+	/* XXX - Needs to be adapted to device driver model */
 }
 
 #ifdef CONFIG_PM
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index 1c551c697c3..6d3f580f266 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -718,8 +718,6 @@ static void hpc_release_ctlr(struct controller *ctrl)
 		if (php_ctlr->irq) {
 			free_irq(php_ctlr->irq, ctrl);
 			php_ctlr->irq = 0;
-			if (!pcie_mch_quirk) 
-				pci_disable_msi(php_ctlr->pci_dev);
 		}
 	}
 	if (php_ctlr->pci_dev) 
diff --git a/drivers/pci/hotplug/rpadlpar_core.c b/drivers/pci/hotplug/rpadlpar_core.c
index 46825fee3ae..72383467a0d 100644
--- a/drivers/pci/hotplug/rpadlpar_core.c
+++ b/drivers/pci/hotplug/rpadlpar_core.c
@@ -63,7 +63,7 @@ static struct device_node *find_php_slot_pci_node(char *drc_name,
 	char *type;
 	int rc;
 
-	while ((np = of_find_node_by_type(np, "pci"))) {
+	while ((np = of_find_node_by_name(np, "pci"))) {
 		rc = rpaphp_get_drc_props(np, NULL, &name, &type, NULL);
 		if (rc == 0)
 			if (!strcmp(drc_name, name) && !strcmp(drc_type, type))
diff --git a/drivers/pci/hotplug/rpaphp_core.c b/drivers/pci/hotplug/rpaphp_core.c
index 141486df235..71a2cb8baa4 100644
--- a/drivers/pci/hotplug/rpaphp_core.c
+++ b/drivers/pci/hotplug/rpaphp_core.c
@@ -356,7 +356,7 @@ static int __init rpaphp_init(void)
 	info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
 	init_MUTEX(&rpaphp_sem);
 
-	while ((dn = of_find_node_by_type(dn, "pci")))
+	while ((dn = of_find_node_by_name(dn, "pci")))
 		rpaphp_add_slot(dn);
 
 	return 0;
diff --git a/drivers/pci/hotplug/sgi_hotplug.c b/drivers/pci/hotplug/sgi_hotplug.c
index b62ad31a973..5d188c55838 100644
--- a/drivers/pci/hotplug/sgi_hotplug.c
+++ b/drivers/pci/hotplug/sgi_hotplug.c
@@ -205,21 +205,6 @@ static struct hotplug_slot * sn_hp_destroy(void)
 	return bss_hotplug_slot;
 }
 
-static void sn_bus_alloc_data(struct pci_dev *dev)
-{
-	struct pci_bus *subordinate_bus;
-	struct pci_dev *child;
-
-	sn_pci_fixup_slot(dev);
-
-	/* Recursively sets up the sn_irq_info structs */
-	if (dev->subordinate) {
-		subordinate_bus = dev->subordinate;
-		list_for_each_entry(child, &subordinate_bus->devices, bus_list)
-			sn_bus_alloc_data(child);
-	}
-}
-
 static void sn_bus_free_data(struct pci_dev *dev)
 {
 	struct pci_bus *subordinate_bus;
@@ -337,6 +322,11 @@ static int sn_slot_disable(struct hotplug_slot *bss_hotplug_slot,
 	return rc;
 }
 
+/*
+ * Power up and configure the slot via a SAL call to PROM.
+ * Scan slot (and any children), do any platform specific fixup,
+ * and find device driver.
+ */
 static int enable_slot(struct hotplug_slot *bss_hotplug_slot)
 {
 	struct slot *slot = bss_hotplug_slot->private;
@@ -345,6 +335,7 @@ static int enable_slot(struct hotplug_slot *bss_hotplug_slot)
 	int func, num_funcs;
 	int new_ppb = 0;
 	int rc;
+	void pcibios_fixup_device_resources(struct pci_dev *);
 
 	/* Serialize the Linux PCI infrastructure */
 	mutex_lock(&sn_hotplug_mutex);
@@ -367,9 +358,6 @@ static int enable_slot(struct hotplug_slot *bss_hotplug_slot)
 		return -ENODEV;
 	}
 
-	sn_pci_controller_fixup(pci_domain_nr(slot->pci_bus),
-				slot->pci_bus->number,
-				slot->pci_bus);
 	/*
 	 * Map SN resources for all functions on the card
 	 * to the Linux PCI interface and tell the drivers
@@ -380,6 +368,13 @@ static int enable_slot(struct hotplug_slot *bss_hotplug_slot)
 				   PCI_DEVFN(slot->device_num + 1,
 					     PCI_FUNC(func)));
 		if (dev) {
+			/* Need to do slot fixup on PPB before fixup of children
+			 * (PPB's pcidev_info needs to be in pcidev_info list
+			 * before child's SN_PCIDEV_INFO() call to setup
+			 * pdi_host_pcidev_info).
+			 */
+			pcibios_fixup_device_resources(dev);
+			sn_pci_fixup_slot(dev);
 			if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
 				unsigned char sec_bus;
 				pci_read_config_byte(dev, PCI_SECONDARY_BUS,
@@ -387,12 +382,8 @@ static int enable_slot(struct hotplug_slot *bss_hotplug_slot)
 				new_bus = pci_add_new_bus(dev->bus, dev,
 							  sec_bus);
 				pci_scan_child_bus(new_bus);
-				sn_pci_controller_fixup(pci_domain_nr(new_bus),
-							new_bus->number,
-							new_bus);
 				new_ppb = 1;
 			}
-			sn_bus_alloc_data(dev);
 			pci_dev_put(dev);
 		}
 	}
diff --git a/drivers/pci/msi.h b/drivers/pci/msi.h
index f0cca1772f9..3898f523714 100644
--- a/drivers/pci/msi.h
+++ b/drivers/pci/msi.h
@@ -6,14 +6,6 @@
 #ifndef MSI_H
 #define MSI_H
 
-/*
- * MSI-X Address Register
- */
-#define PCI_MSIX_FLAGS_QSIZE		0x7FF
-#define PCI_MSIX_FLAGS_ENABLE		(1 << 15)
-#define PCI_MSIX_FLAGS_BIRMASK		(7 << 0)
-#define PCI_MSIX_FLAGS_BITMASK		(1 << 0)
-
 #define PCI_MSIX_ENTRY_SIZE			16
 #define  PCI_MSIX_ENTRY_LOWER_ADDR_OFFSET	0
 #define  PCI_MSIX_ENTRY_UPPER_ADDR_OFFSET	4
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index bb7456c1dba..a064f36a080 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -36,6 +36,7 @@ acpi_query_osc (
 	struct acpi_buffer	output = {ACPI_ALLOCATE_BUFFER, NULL};
 	union acpi_object 	*out_obj;
 	u32			osc_dw0;
+	acpi_status *ret_status = (acpi_status *)retval;
 
 	
 	/* Setting up input parameters */
@@ -56,6 +57,7 @@ acpi_query_osc (
 	if (ACPI_FAILURE (status)) {
 		printk(KERN_DEBUG  
 			"Evaluate _OSC Set fails. Status = 0x%04x\n", status);
+		*ret_status = status;
 		return status;
 	}
 	out_obj = output.pointer;
@@ -90,6 +92,7 @@ acpi_query_osc (
 
 query_osc_out:
 	kfree(output.pointer);
+	*ret_status = status;
 	return status;
 }
 
@@ -166,6 +169,7 @@ run_osc_out:
 acpi_status pci_osc_support_set(u32 flags)
 {
 	u32 temp;
+	acpi_status retval;
 
 	if (!(flags & OSC_SUPPORT_MASKS)) {
 		return AE_TYPE;
@@ -179,9 +183,13 @@ acpi_status pci_osc_support_set(u32 flags)
 	acpi_get_devices ( PCI_ROOT_HID_STRING,
 			acpi_query_osc,
 			ctrlset_buf,
-			NULL );
+			(void **) &retval );
 	ctrlset_buf[OSC_QUERY_TYPE] = !OSC_QUERY_ENABLE;
 	ctrlset_buf[OSC_CONTROL_TYPE] = temp;
+	if (ACPI_FAILURE(retval)) {
+		/* no osc support at all */
+		ctrlset_buf[OSC_SUPPORT_TYPE] = 0;
+	}
 	return AE_OK;
 }
 EXPORT_SYMBOL(pci_osc_support_set);
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 194f1d21d3d..e5ae3a0c13b 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -329,8 +329,8 @@ static int pci_default_resume(struct pci_dev *pci_dev)
 	/* restore the PCI config space */
 	pci_restore_state(pci_dev);
 	/* if the device was enabled before suspend, reenable */
-	if (pci_dev->is_enabled)
-		retval = pci_enable_device(pci_dev);
+	if (atomic_read(&pci_dev->enable_cnt))
+		retval = __pci_enable_device(pci_dev);
 	/* if the device was busmaster before the suspend, make it busmaster again */
 	if (pci_dev->is_busmaster)
 		pci_set_master(pci_dev);
@@ -445,9 +445,12 @@ int __pci_register_driver(struct pci_driver *drv, struct module *owner)
 
 	/* register with core */
 	error = driver_register(&drv->driver);
+	if (error)
+		return error;
 
-	if (!error)
-		error = pci_create_newid_file(drv);
+	error = pci_create_newid_file(drv);
+	if (error)
+		driver_unregister(&drv->driver);
 
 	return error;
 }
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index f952bfea48a..7a94076752d 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -42,7 +42,6 @@ pci_config_attr(subsystem_vendor, "0x%04x\n");
 pci_config_attr(subsystem_device, "0x%04x\n");
 pci_config_attr(class, "0x%06x\n");
 pci_config_attr(irq, "%u\n");
-pci_config_attr(is_enabled, "%u\n");
 
 static ssize_t broken_parity_status_show(struct device *dev,
 					 struct device_attribute *attr,
@@ -112,26 +111,36 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
 		       (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8),
 		       (u8)(pci_dev->class));
 }
-static ssize_t
-is_enabled_store(struct device *dev, struct device_attribute *attr,
-		const char *buf, size_t count)
+
+static ssize_t is_enabled_store(struct device *dev,
+				struct device_attribute *attr, const char *buf,
+				size_t count)
 {
+	ssize_t result = -EINVAL;
 	struct pci_dev *pdev = to_pci_dev(dev);
-	int retval = 0;
 
 	/* this can crash the machine when done on the "wrong" device */
 	if (!capable(CAP_SYS_ADMIN))
 		return count;
 
-	if (*buf == '0')
-		pci_disable_device(pdev);
+	if (*buf == '0') {
+		if (atomic_read(&pdev->enable_cnt) != 0)
+			pci_disable_device(pdev);
+		else
+			result = -EIO;
+	} else if (*buf == '1')
+		result = pci_enable_device(pdev);
+
+	return result < 0 ? result : count;
+}
 
-	if (*buf == '1')
-		retval = pci_enable_device(pdev);
+static ssize_t is_enabled_show(struct device *dev,
+			       struct device_attribute *attr, char *buf)
+{
+	struct pci_dev *pdev;
 
-	if (retval)
-		return retval;
-	return count;
+	pdev = to_pci_dev (dev);
+	return sprintf (buf, "%u\n", atomic_read(&pdev->enable_cnt));
 }
 
 static ssize_t
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index a544997399b..5a14b73cf3a 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -490,6 +490,47 @@ static void pci_restore_pcie_state(struct pci_dev *dev)
 	kfree(save_state);
 }
 
+
+static int pci_save_pcix_state(struct pci_dev *dev)
+{
+	int pos, i = 0;
+	struct pci_cap_saved_state *save_state;
+	u16 *cap;
+
+	pos = pci_find_capability(dev, PCI_CAP_ID_PCIX);
+	if (pos <= 0)
+		return 0;
+
+	save_state = kzalloc(sizeof(*save_state) + sizeof(u16), GFP_KERNEL);
+	if (!save_state) {
+		dev_err(&dev->dev, "Out of memory in pci_save_pcie_state\n");
+		return -ENOMEM;
+	}
+	cap = (u16 *)&save_state->data[0];
+
+	pci_read_config_word(dev, pos + PCI_X_CMD, &cap[i++]);
+	pci_add_saved_cap(dev, save_state);
+	return 0;
+}
+
+static void pci_restore_pcix_state(struct pci_dev *dev)
+{
+	int i = 0, pos;
+	struct pci_cap_saved_state *save_state;
+	u16 *cap;
+
+	save_state = pci_find_saved_cap(dev, PCI_CAP_ID_PCIX);
+	pos = pci_find_capability(dev, PCI_CAP_ID_PCIX);
+	if (!save_state || pos <= 0)
+		return;
+	cap = (u16 *)&save_state->data[0];
+
+	pci_write_config_word(dev, pos + PCI_X_CMD, cap[i++]);
+	pci_remove_saved_cap(save_state);
+	kfree(save_state);
+}
+
+
 /**
  * pci_save_state - save the PCI configuration space of a device before suspending
  * @dev: - PCI device that we're dealing with
@@ -507,6 +548,8 @@ pci_save_state(struct pci_dev *dev)
 		return i;
 	if ((i = pci_save_pcie_state(dev)) != 0)
 		return i;
+	if ((i = pci_save_pcix_state(dev)) != 0)
+		return i;
 	return 0;
 }
 
@@ -538,6 +581,7 @@ pci_restore_state(struct pci_dev *dev)
 				dev->saved_config_space[i]);
 		}
 	}
+	pci_restore_pcix_state(dev);
 	pci_restore_msi_state(dev);
 	pci_restore_msix_state(dev);
 	return 0;
@@ -568,30 +612,51 @@ pci_enable_device_bars(struct pci_dev *dev, int bars)
 }
 
 /**
- * pci_enable_device - Initialize device before it's used by a driver.
+ * __pci_enable_device - Initialize device before it's used by a driver.
  * @dev: PCI device to be initialized
  *
  *  Initialize device before it's used by a driver. Ask low-level code
  *  to enable I/O and memory. Wake up the device if it was suspended.
  *  Beware, this function can fail.
+ *
+ * Note this function is a backend and is not supposed to be called by
+ * normal code, use pci_enable_device() instead.
  */
 int
-pci_enable_device(struct pci_dev *dev)
+__pci_enable_device(struct pci_dev *dev)
 {
 	int err;
 
-	if (dev->is_enabled)
-		return 0;
-
 	err = pci_enable_device_bars(dev, (1 << PCI_NUM_RESOURCES) - 1);
 	if (err)
 		return err;
 	pci_fixup_device(pci_fixup_enable, dev);
-	dev->is_enabled = 1;
 	return 0;
 }
 
 /**
+ * pci_enable_device - Initialize device before it's used by a driver.
+ * @dev: PCI device to be initialized
+ *
+ *  Initialize device before it's used by a driver. Ask low-level code
+ *  to enable I/O and memory. Wake up the device if it was suspended.
+ *  Beware, this function can fail.
+ *
+ *  Note we don't actually enable the device many times if we call
+ *  this function repeatedly (we just increment the count).
+ */
+int pci_enable_device(struct pci_dev *dev)
+{
+	int result;
+	if (atomic_add_return(1, &dev->enable_cnt) > 1)
+		return 0;		/* already enabled */
+	result = __pci_enable_device(dev);
+	if (result < 0)
+		atomic_dec(&dev->enable_cnt);
+	return result;
+}
+
+/**
  * pcibios_disable_device - disable arch specific PCI resources for device dev
  * @dev: the PCI device to disable
  *
@@ -607,12 +672,18 @@ void __attribute__ ((weak)) pcibios_disable_device (struct pci_dev *dev) {}
  *
  * Signal to the system that the PCI device is not in use by the system
  * anymore.  This only involves disabling PCI bus-mastering, if active.
+ *
+ * Note we don't actually disable the device until all callers of
+ * pci_device_enable() have called pci_device_disable().
  */
 void
 pci_disable_device(struct pci_dev *dev)
 {
 	u16 pci_command;
 
+	if (atomic_sub_return(1, &dev->enable_cnt) != 0)
+		return;
+
 	if (dev->msi_enabled)
 		disable_msi_mode(dev, pci_find_capability(dev, PCI_CAP_ID_MSI),
 			PCI_CAP_ID_MSI);
@@ -628,7 +699,6 @@ pci_disable_device(struct pci_dev *dev)
 	dev->is_busmaster = 0;
 
 	pcibios_disable_device(dev);
-	dev->is_enabled = 0;
 }
 
 /**
@@ -831,22 +901,38 @@ pci_set_master(struct pci_dev *dev)
 	pcibios_set_master(dev);
 }
 
-#ifndef HAVE_ARCH_PCI_MWI
+#ifdef PCI_DISABLE_MWI
+int pci_set_mwi(struct pci_dev *dev)
+{
+	return 0;
+}
+
+void pci_clear_mwi(struct pci_dev *dev)
+{
+}
+
+#else
+
+#ifndef PCI_CACHE_LINE_BYTES
+#define PCI_CACHE_LINE_BYTES L1_CACHE_BYTES
+#endif
+
 /* This can be overridden by arch code. */
-u8 pci_cache_line_size = L1_CACHE_BYTES >> 2;
+/* Don't forget this is measured in 32-bit words, not bytes */
+u8 pci_cache_line_size = PCI_CACHE_LINE_BYTES / 4;
 
 /**
- * pci_generic_prep_mwi - helper function for pci_set_mwi
- * @dev: the PCI device for which MWI is enabled
+ * pci_set_cacheline_size - ensure the CACHE_LINE_SIZE register is programmed
+ * @dev: the PCI device for which MWI is to be enabled
  *
- * Helper function for generic implementation of pcibios_prep_mwi
- * function.  Originally copied from drivers/net/acenic.c.
+ * Helper function for pci_set_mwi.
+ * Originally copied from drivers/net/acenic.c.
  * Copyright 1998-2001 by Jes Sorensen, <jes@trained-monkey.org>.
  *
  * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
  */
 static int
-pci_generic_prep_mwi(struct pci_dev *dev)
+pci_set_cacheline_size(struct pci_dev *dev)
 {
 	u8 cacheline_size;
 
@@ -872,7 +958,6 @@ pci_generic_prep_mwi(struct pci_dev *dev)
 
 	return -EINVAL;
 }
-#endif /* !HAVE_ARCH_PCI_MWI */
 
 /**
  * pci_set_mwi - enables memory-write-invalidate PCI transaction
@@ -890,12 +975,7 @@ pci_set_mwi(struct pci_dev *dev)
 	int rc;
 	u16 cmd;
 
-#ifdef HAVE_ARCH_PCI_MWI
-	rc = pcibios_prep_mwi(dev);
-#else
-	rc = pci_generic_prep_mwi(dev);
-#endif
-
+	rc = pci_set_cacheline_size(dev);
 	if (rc)
 		return rc;
 
@@ -926,6 +1006,7 @@ pci_clear_mwi(struct pci_dev *dev)
 		pci_write_config_word(dev, PCI_COMMAND, cmd);
 	}
 }
+#endif /* ! PCI_DISABLE_MWI */
 
 /**
  * pci_intx - enables/disables PCI INTx for device dev
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 6bf327db5c5..398852f526a 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -1,5 +1,6 @@
 /* Functions internal to the PCI core code */
 
+extern int __must_check __pci_enable_device(struct pci_dev *);
 extern int pci_uevent(struct device *dev, char **envp, int num_envp,
 		      char *buffer, int buffer_size);
 extern int pci_create_sysfs_dev_files(struct pci_dev *pdev);
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index e159d660449..0eeac60042b 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -679,6 +679,33 @@ static int pci_setup_device(struct pci_dev * dev)
 		pci_read_bases(dev, 6, PCI_ROM_ADDRESS);
 		pci_read_config_word(dev, PCI_SUBSYSTEM_VENDOR_ID, &dev->subsystem_vendor);
 		pci_read_config_word(dev, PCI_SUBSYSTEM_ID, &dev->subsystem_device);
+
+		/*
+		 *	Do the ugly legacy mode stuff here rather than broken chip
+		 *	quirk code. Legacy mode ATA controllers have fixed
+		 *	addresses. These are not always echoed in BAR0-3, and
+		 *	BAR0-3 in a few cases contain junk!
+		 */
+		if (class == PCI_CLASS_STORAGE_IDE) {
+			u8 progif;
+			pci_read_config_byte(dev, PCI_CLASS_PROG, &progif);
+			if ((progif & 1) == 0) {
+				dev->resource[0].start = 0x1F0;
+				dev->resource[0].end = 0x1F7;
+				dev->resource[0].flags = IORESOURCE_IO;
+				dev->resource[1].start = 0x3F6;
+				dev->resource[1].end = 0x3F6;
+				dev->resource[1].flags = IORESOURCE_IO;
+			}
+			if ((progif & 4) == 0) {
+				dev->resource[2].start = 0x170;
+				dev->resource[2].end = 0x177;
+				dev->resource[2].flags = IORESOURCE_IO;
+				dev->resource[3].start = 0x376;
+				dev->resource[3].end = 0x376;
+				dev->resource[3].flags = IORESOURCE_IO;
+			}
+		}
 		break;
 
 	case PCI_HEADER_TYPE_BRIDGE:		    /* bridge header */
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 5b448381169..9ca9b9bf616 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -797,56 +797,6 @@ static void __init quirk_mediagx_master(struct pci_dev *dev)
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CYRIX,	PCI_DEVICE_ID_CYRIX_PCI_MASTER, quirk_mediagx_master );
 
 /*
- * As per PCI spec, ignore base address registers 0-3 of the IDE controllers
- * running in Compatible mode (bits 0 and 2 in the ProgIf for primary and
- * secondary channels respectively). If the device reports Compatible mode
- * but does use BAR0-3 for address decoding, we assume that firmware has
- * programmed these BARs with standard values (0x1f0,0x3f4 and 0x170,0x374).
- * Exceptions (if they exist) must be handled in chip/architecture specific
- * fixups.
- *
- * Note: for non x86 people. You may need an arch specific quirk to handle
- * moving IDE devices to native mode as well. Some plug in card devices power
- * up in compatible mode and assume the BIOS will adjust them.
- *
- * Q: should we load the 0x1f0,0x3f4 into the registers or zap them as
- * we do now ? We don't want is pci_enable_device to come along
- * and assign new resources. Both approaches work for that.
- */ 
-static void __devinit quirk_ide_bases(struct pci_dev *dev)
-{
-       struct resource *res;
-       int first_bar = 2, last_bar = 0;
-
-       if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE)
-               return;
-
-       res = &dev->resource[0];
-
-       /* primary channel: ProgIf bit 0, BAR0, BAR1 */
-       if (!(dev->class & 1) && (res[0].flags || res[1].flags)) { 
-               res[0].start = res[0].end = res[0].flags = 0;
-               res[1].start = res[1].end = res[1].flags = 0;
-               first_bar = 0;
-               last_bar = 1;
-       }
-
-       /* secondary channel: ProgIf bit 2, BAR2, BAR3 */
-       if (!(dev->class & 4) && (res[2].flags || res[3].flags)) { 
-               res[2].start = res[2].end = res[2].flags = 0;
-               res[3].start = res[3].end = res[3].flags = 0;
-               last_bar = 3;
-       }
-
-       if (!last_bar)
-               return;
-
-       printk(KERN_INFO "PCI: Ignoring BAR%d-%d of IDE controller %s\n",
-              first_bar, last_bar, pci_name(dev));
-}
-DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, quirk_ide_bases);
-
-/*
  *	Ensure C0 rev restreaming is off. This is normally done by
  *	the BIOS but in the odd case it is not the results are corruption
  *	hence the presence of a Linux check
@@ -880,11 +830,10 @@ static void __devinit quirk_svwks_csb5ide(struct pci_dev *pdev)
 		prog &= ~5;
 		pdev->class &= ~5;
 		pci_write_config_byte(pdev, PCI_CLASS_PROG, prog);
-		/* need to re-assign BARs for compat mode */
-		quirk_ide_bases(pdev);
+		/* PCI layer will sort out resources */
 	}
 }
-DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, quirk_svwks_csb5ide );
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, quirk_svwks_csb5ide );
 
 /*
  *	Intel 82801CAM ICH3-M datasheet says IDE modes must be the same
@@ -900,11 +849,9 @@ static void __init quirk_ide_samemode(struct pci_dev *pdev)
 		prog &= ~5;
 		pdev->class &= ~5;
 		pci_write_config_byte(pdev, PCI_CLASS_PROG, prog);
-		/* need to re-assign BARs for compat mode */
-		quirk_ide_bases(pdev);
 	}
 }
-DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_10, quirk_ide_samemode);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_10, quirk_ide_samemode);
 
 /* This was originally an Alpha specific thing, but it really fits here.
  * The i82375 PCI/EISA bridge appears as non-classified. Fix that.
diff --git a/drivers/pci/rom.c b/drivers/pci/rom.c
index e1dcefc69bb..d087e081771 100644
--- a/drivers/pci/rom.c
+++ b/drivers/pci/rom.c
@@ -81,7 +81,8 @@ void __iomem *pci_map_rom(struct pci_dev *pdev, size_t *size)
 		start = (loff_t)0xC0000;
 		*size = 0x20000; /* cover C000:0 through E000:0 */
 	} else {
-		if (res->flags & IORESOURCE_ROM_COPY) {
+		if (res->flags &
+			(IORESOURCE_ROM_COPY | IORESOURCE_ROM_BIOS_COPY)) {
 			*size = pci_resource_len(pdev, PCI_ROM_RESOURCE);
 			return (void __iomem *)(unsigned long)
 				pci_resource_start(pdev, PCI_ROM_RESOURCE);
@@ -165,7 +166,8 @@ void __iomem *pci_map_rom_copy(struct pci_dev *pdev, size_t *size)
 	if (!rom)
 		return NULL;
 
-	if (res->flags & (IORESOURCE_ROM_COPY | IORESOURCE_ROM_SHADOW))
+	if (res->flags & (IORESOURCE_ROM_COPY | IORESOURCE_ROM_SHADOW |
+			  IORESOURCE_ROM_BIOS_COPY))
 		return rom;
 
 	res->start = (unsigned long)kmalloc(*size, GFP_KERNEL);
@@ -191,7 +193,7 @@ void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom)
 {
 	struct resource *res = &pdev->resource[PCI_ROM_RESOURCE];
 
-	if (res->flags & IORESOURCE_ROM_COPY)
+	if (res->flags & (IORESOURCE_ROM_COPY | IORESOURCE_ROM_BIOS_COPY))
 		return;
 
 	iounmap(rom);
@@ -215,6 +217,7 @@ void pci_remove_rom(struct pci_dev *pdev)
 		sysfs_remove_bin_file(&pdev->dev.kobj, pdev->rom_attr);
 	if (!(res->flags & (IORESOURCE_ROM_ENABLE |
 			    IORESOURCE_ROM_SHADOW |
+			    IORESOURCE_ROM_BIOS_COPY |
 			    IORESOURCE_ROM_COPY)))
 		pci_disable_rom(pdev);
 }
diff --git a/include/asm-ia64/io.h b/include/asm-ia64/io.h
index 855c30af72a..6311e168cd3 100644
--- a/include/asm-ia64/io.h
+++ b/include/asm-ia64/io.h
@@ -32,7 +32,7 @@
  */
 #define IO_SPACE_LIMIT		0xffffffffffffffffUL
 
-#define MAX_IO_SPACES_BITS		4
+#define MAX_IO_SPACES_BITS		8
 #define MAX_IO_SPACES			(1UL << MAX_IO_SPACES_BITS)
 #define IO_SPACE_BITS			24
 #define IO_SPACE_SIZE			(1UL << IO_SPACE_BITS)
diff --git a/include/asm-ia64/machvec.h b/include/asm-ia64/machvec.h
index 7ffbddf5306..8f784f8e45b 100644
--- a/include/asm-ia64/machvec.h
+++ b/include/asm-ia64/machvec.h
@@ -36,6 +36,7 @@ typedef int ia64_mv_pci_legacy_read_t (struct pci_bus *, u16 port, u32 *val,
 typedef int ia64_mv_pci_legacy_write_t (struct pci_bus *, u16 port, u32 val,
 					u8 size);
 typedef void ia64_mv_migrate_t(struct task_struct * task);
+typedef void ia64_mv_pci_fixup_bus_t (struct pci_bus *);
 
 /* DMA-mapping interface: */
 typedef void ia64_mv_dma_init (void);
@@ -95,6 +96,11 @@ machvec_noop_task (struct task_struct *task)
 {
 }
 
+static inline void
+machvec_noop_bus (struct pci_bus *bus)
+{
+}
+
 extern void machvec_setup (char **);
 extern void machvec_timer_interrupt (int, void *);
 extern void machvec_dma_sync_single (struct device *, dma_addr_t, size_t, int);
@@ -159,6 +165,7 @@ extern void machvec_tlb_migrate_finish (struct mm_struct *);
 #  define platform_migrate		ia64_mv.migrate
 #  define platform_setup_msi_irq	ia64_mv.setup_msi_irq
 #  define platform_teardown_msi_irq	ia64_mv.teardown_msi_irq
+#  define platform_pci_fixup_bus	ia64_mv.pci_fixup_bus
 # endif
 
 /* __attribute__((__aligned__(16))) is required to make size of the
@@ -210,6 +217,7 @@ struct ia64_machine_vector {
 	ia64_mv_migrate_t *migrate;
 	ia64_mv_setup_msi_irq_t *setup_msi_irq;
 	ia64_mv_teardown_msi_irq_t *teardown_msi_irq;
+	ia64_mv_pci_fixup_bus_t *pci_fixup_bus;
 } __attribute__((__aligned__(16))); /* align attrib? see above comment */
 
 #define MACHVEC_INIT(name)			\
@@ -257,6 +265,7 @@ struct ia64_machine_vector {
 	platform_migrate,			\
 	platform_setup_msi_irq,			\
 	platform_teardown_msi_irq,		\
+	platform_pci_fixup_bus,			\
 }
 
 extern struct ia64_machine_vector ia64_mv;
@@ -416,5 +425,8 @@ extern int ia64_pci_legacy_write(struct pci_bus *bus, u16 port, u32 val, u8 size
 #ifndef platform_teardown_msi_irq
 # define platform_teardown_msi_irq	((ia64_mv_teardown_msi_irq_t*)NULL)
 #endif
+#ifndef platform_pci_fixup_bus
+# define platform_pci_fixup_bus	machvec_noop_bus
+#endif
 
 #endif /* _ASM_IA64_MACHVEC_H */
diff --git a/include/asm-ia64/machvec_sn2.h b/include/asm-ia64/machvec_sn2.h
index c54b165b1c1..83325f6db03 100644
--- a/include/asm-ia64/machvec_sn2.h
+++ b/include/asm-ia64/machvec_sn2.h
@@ -69,6 +69,7 @@ extern ia64_mv_dma_supported		sn_dma_supported;
 extern ia64_mv_migrate_t		sn_migrate;
 extern ia64_mv_setup_msi_irq_t		sn_setup_msi_irq;
 extern ia64_mv_teardown_msi_irq_t	sn_teardown_msi_irq;
+extern ia64_mv_pci_fixup_bus_t		sn_pci_fixup_bus;
 
 
 /*
@@ -127,6 +128,7 @@ extern ia64_mv_teardown_msi_irq_t	sn_teardown_msi_irq;
 #define platform_setup_msi_irq		((ia64_mv_setup_msi_irq_t*)NULL)
 #define platform_teardown_msi_irq	((ia64_mv_teardown_msi_irq_t*)NULL)
 #endif
+#define platform_pci_fixup_bus		sn_pci_fixup_bus
 
 #include <asm/sn/io.h>
 
diff --git a/include/asm-ia64/pci.h b/include/asm-ia64/pci.h
index ef616fd4cb1..825eb7d882e 100644
--- a/include/asm-ia64/pci.h
+++ b/include/asm-ia64/pci.h
@@ -26,16 +26,18 @@ void pcibios_config_init(void);
 struct pci_dev;
 
 /*
- * PCI_DMA_BUS_IS_PHYS should be set to 1 if there is _necessarily_ a direct correspondence
- * between device bus addresses and CPU physical addresses.  Platforms with a hardware I/O
- * MMU _must_ turn this off to suppress the bounce buffer handling code in the block and
- * network device layers.  Platforms with separate bus address spaces _must_ turn this off
- * and provide a device DMA mapping implementation that takes care of the necessary
+ * PCI_DMA_BUS_IS_PHYS should be set to 1 if there is _necessarily_ a direct
+ * correspondence between device bus addresses and CPU physical addresses.
+ * Platforms with a hardware I/O MMU _must_ turn this off to suppress the
+ * bounce buffer handling code in the block and network device layers.
+ * Platforms with separate bus address spaces _must_ turn this off and provide
+ * a device DMA mapping implementation that takes care of the necessary
  * address translation.
  *
- * For now, the ia64 platforms which may have separate/multiple bus address spaces all
- * have I/O MMUs which support the merging of physically discontiguous buffers, so we can
- * use that as the sole factor to determine the setting of PCI_DMA_BUS_IS_PHYS.
+ * For now, the ia64 platforms which may have separate/multiple bus address
+ * spaces all have I/O MMUs which support the merging of physically
+ * discontiguous buffers, so we can use that as the sole factor to determine
+ * the setting of PCI_DMA_BUS_IS_PHYS.
  */
 extern unsigned long ia64_max_iommu_merge_mask;
 #define PCI_DMA_BUS_IS_PHYS	(ia64_max_iommu_merge_mask == ~0UL)
@@ -52,9 +54,6 @@ pcibios_penalize_isa_irq (int irq, int active)
 	/* We don't do dynamic PCI IRQ allocation */
 }
 
-#define HAVE_ARCH_PCI_MWI 1
-extern int pcibios_prep_mwi (struct pci_dev *);
-
 #include <asm-generic/pci-dma-compat.h>
 
 /* pci_unmap_{single,page} is not a nop, thus... */
diff --git a/include/asm-ia64/sn/acpi.h b/include/asm-ia64/sn/acpi.h
new file mode 100644
index 00000000000..2850a7ef5e7
--- /dev/null
+++ b/include/asm-ia64/sn/acpi.h
@@ -0,0 +1,16 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2006 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#ifndef _ASM_IA64_SN_ACPI_H
+#define _ASM_IA64_SN_ACPI_H
+
+#include "acpi/acglobal.h"
+
+#define SN_ACPI_BASE_SUPPORT()   (acpi_gbl_DSDT->oem_revision >= 0x20101)
+
+#endif /* _ASM_IA64_SN_ACPI_H */
diff --git a/include/asm-ia64/sn/pcidev.h b/include/asm-ia64/sn/pcidev.h
index eac3561574b..9fe89a93d88 100644
--- a/include/asm-ia64/sn/pcidev.h
+++ b/include/asm-ia64/sn/pcidev.h
@@ -3,7 +3,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 1992 - 1997, 2000-2005 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 1992 - 1997, 2000-2006 Silicon Graphics, Inc. All rights reserved.
  */
 #ifndef _ASM_IA64_SN_PCI_PCIDEV_H
 #define _ASM_IA64_SN_PCI_PCIDEV_H
@@ -12,31 +12,29 @@
 
 /*
  * In ia64, pci_dev->sysdata must be a *pci_controller. To provide access to
- * the pcidev_info structs for all devices under a controller, we extend the
- * definition of pci_controller, via sn_pci_controller, to include a list
- * of pcidev_info.
+ * the pcidev_info structs for all devices under a controller, we keep a
+ * list of pcidev_info under pci_controller->platform_data.
  */
-struct sn_pci_controller {
-	struct pci_controller pci_controller;
+struct sn_platform_data {
+	void *provider_soft;
 	struct list_head pcidev_info;
 };
 
-#define SN_PCI_CONTROLLER(dev) ((struct sn_pci_controller *) dev->sysdata)
+#define SN_PLATFORM_DATA(busdev) \
+	((struct sn_platform_data *)(PCI_CONTROLLER(busdev)->platform_data))
 
 #define SN_PCIDEV_INFO(dev)	sn_pcidev_info_get(dev)
 
-#define SN_PCIBUS_BUSSOFT_INFO(pci_bus) \
-	(struct pcibus_info *)((struct pcibus_bussoft *)(PCI_CONTROLLER((pci_bus))->platform_data))
 /*
  * Given a pci_bus, return the sn pcibus_bussoft struct.  Note that
  * this only works for root busses, not for busses represented by PPB's.
  */
 
 #define SN_PCIBUS_BUSSOFT(pci_bus) \
-        ((struct pcibus_bussoft *)(PCI_CONTROLLER((pci_bus))->platform_data))
+	((struct pcibus_bussoft *)(SN_PLATFORM_DATA(pci_bus)->provider_soft))
 
 #define SN_PCIBUS_BUSSOFT_INFO(pci_bus) \
-	(struct pcibus_info *)((struct pcibus_bussoft *)(PCI_CONTROLLER((pci_bus))->platform_data))
+	((struct pcibus_info *)(SN_PLATFORM_DATA(pci_bus)->provider_soft))
 /*
  * Given a struct pci_dev, return the sn pcibus_bussoft struct.  Note
  * that this is not equivalent to SN_PCIBUS_BUSSOFT(pci_dev->bus) due
@@ -72,8 +70,6 @@ extern void sn_irq_fixup(struct pci_dev *pci_dev,
 			 struct sn_irq_info *sn_irq_info);
 extern void sn_irq_unfixup(struct pci_dev *pci_dev);
 extern struct pcidev_info * sn_pcidev_info_get(struct pci_dev *);
-extern void sn_pci_controller_fixup(int segment, int busnum,
- 				    struct pci_bus *bus);
 extern void sn_bus_store_sysdata(struct pci_dev *dev);
 extern void sn_bus_free_sysdata(void);
 extern void sn_generate_path(struct pci_bus *pci_bus, char *address);
diff --git a/include/asm-ia64/sn/sn_feature_sets.h b/include/asm-ia64/sn/sn_feature_sets.h
index 30dcfa442e5..bfdc36273ed 100644
--- a/include/asm-ia64/sn/sn_feature_sets.h
+++ b/include/asm-ia64/sn/sn_feature_sets.h
@@ -44,8 +44,14 @@ extern int sn_prom_feature_available(int id);
  * Once enabled, a feature cannot be disabled.
  *
  * By default, features are disabled unless explicitly enabled.
+ *
+ * These defines must be kept in sync with the corresponding
+ * PROM definitions in feature_sets.h.
  */
 #define  OSF_MCA_SLV_TO_OS_INIT_SLV	0
 #define  OSF_FEAT_LOG_SBES		1
+#define  OSF_ACPI_ENABLE		2
+#define  OSF_PCISEGMENT_ENABLE		3
+
 
 #endif /* _ASM_IA64_SN_FEATURE_SETS_H */
diff --git a/include/asm-ia64/sn/sn_sal.h b/include/asm-ia64/sn/sn_sal.h
index ba826b3f75b..be5d83ad7cb 100644
--- a/include/asm-ia64/sn/sn_sal.h
+++ b/include/asm-ia64/sn/sn_sal.h
@@ -77,6 +77,7 @@
 #define  SN_SAL_IOIF_GET_WIDGET_DMAFLUSH_LIST	   0x02000058	// deprecated
 #define  SN_SAL_IOIF_GET_DEVICE_DMAFLUSH_LIST	   0x0200005a
 
+#define SN_SAL_IOIF_INIT			   0x0200005f
 #define SN_SAL_HUB_ERROR_INTERRUPT		   0x02000060
 #define SN_SAL_BTE_RECOVER			   0x02000061
 #define SN_SAL_RESERVED_DO_NOT_USE		   0x02000062
diff --git a/include/asm-powerpc/pci.h b/include/asm-powerpc/pci.h
index 46afd29b904..721c97f09b2 100644
--- a/include/asm-powerpc/pci.h
+++ b/include/asm-powerpc/pci.h
@@ -62,19 +62,13 @@ static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
 }
 
 #ifdef CONFIG_PPC64
-#define HAVE_ARCH_PCI_MWI 1
-static inline int pcibios_prep_mwi(struct pci_dev *dev)
-{
-	/*
-	 * We would like to avoid touching the cacheline size or MWI bit
-	 * but we cant do that with the current pcibios_prep_mwi 
-	 * interface. pSeries firmware sets the cacheline size (which is not
-	 * the cpu cacheline size in all cases) and hardware treats MWI 
-	 * the same as memory write. So we dont touch the cacheline size
-	 * here and allow the generic code to set the MWI bit.
-	 */
-	return 0;
-}
+
+/*
+ * We want to avoid touching the cacheline size or MWI bit.
+ * pSeries firmware sets the cacheline size (which is not the cpu cacheline
+ * size in all cases) and hardware treats MWI the same as memory write.
+ */
+#define PCI_DISABLE_MWI
 
 extern struct dma_mapping_ops pci_dma_ops;
 
diff --git a/include/asm-sparc64/pci.h b/include/asm-sparc64/pci.h
index e1ea67bc32f..ca6560288ae 100644
--- a/include/asm-sparc64/pci.h
+++ b/include/asm-sparc64/pci.h
@@ -18,6 +18,8 @@
 
 #define PCI_IRQ_NONE		0xffffffff
 
+#define PCI_CACHE_LINE_BYTES	64
+
 static inline void pcibios_set_master(struct pci_dev *dev)
 {
 	/* No special bus mastering setup handling */
@@ -291,10 +293,6 @@ extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
 			       enum pci_mmap_state mmap_state,
 			       int write_combine);
 
-/* Platform specific MWI support. */
-#define HAVE_ARCH_PCI_MWI
-extern int pcibios_prep_mwi(struct pci_dev *dev);
-
 extern void
 pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
 			struct resource *res);
diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index d42c8339907..cf8696d4a13 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -89,6 +89,7 @@ struct resource_list {
 #define IORESOURCE_ROM_ENABLE		(1<<0)	/* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
 #define IORESOURCE_ROM_SHADOW		(1<<1)	/* ROM is copy at C000:0 */
 #define IORESOURCE_ROM_COPY		(1<<2)	/* ROM is alloc'd copy, resource field overlaid */
+#define IORESOURCE_ROM_BIOS_COPY	(1<<3)	/* ROM is BIOS copy, resource field overlaid */
 
 /* PC/ISA/whatever - the normal PC address spaces: IO and memory */
 extern struct resource ioport_resource;
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 09be0f81b27..01c707261f9 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -51,6 +51,7 @@
 #include <linux/list.h>
 #include <linux/compiler.h>
 #include <linux/errno.h>
+#include <asm/atomic.h>
 #include <linux/device.h>
 
 /* File state for mmap()s on /proc/bus/pci/X/Y */
@@ -159,7 +160,6 @@ struct pci_dev {
 	unsigned int	transparent:1;	/* Transparent PCI bridge */
 	unsigned int	multifunction:1;/* Part of multi-function device */
 	/* keep track of device state */
-	unsigned int	is_enabled:1;	/* pci_enable_device has been called */
 	unsigned int	is_busmaster:1; /* device is busmaster */
 	unsigned int	no_msi:1;	/* device may not use msi */
 	unsigned int	no_d1d2:1;   /* only allow d0 or d3 */
@@ -167,6 +167,7 @@ struct pci_dev {
 	unsigned int	broken_parity_status:1;	/* Device generates false positive parity */
 	unsigned int 	msi_enabled:1;
 	unsigned int	msix_enabled:1;
+	atomic_t	enable_cnt;	/* pci_enable_device has been called */
 
 	u32		saved_config_space[16]; /* config space saved at suspend time */
 	struct hlist_head saved_cap_space;
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index fa4e1d79978..e060a763794 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -2211,6 +2211,13 @@
 #define PCI_DEVICE_ID_INTEL_ICH8_4	0x2815
 #define PCI_DEVICE_ID_INTEL_ICH8_5	0x283e
 #define PCI_DEVICE_ID_INTEL_ICH8_6	0x2850
+#define PCI_DEVICE_ID_INTEL_ICH9_0	0x2910
+#define PCI_DEVICE_ID_INTEL_ICH9_1	0x2911
+#define PCI_DEVICE_ID_INTEL_ICH9_2	0x2912
+#define PCI_DEVICE_ID_INTEL_ICH9_3	0x2913
+#define PCI_DEVICE_ID_INTEL_ICH9_4	0x2914
+#define PCI_DEVICE_ID_INTEL_ICH9_5	0x2915
+#define PCI_DEVICE_ID_INTEL_ICH9_6	0x2930
 #define PCI_DEVICE_ID_INTEL_82855PM_HB	0x3340
 #define PCI_DEVICE_ID_INTEL_82830_HB	0x3575
 #define PCI_DEVICE_ID_INTEL_82830_CGC	0x3577
diff --git a/include/linux/pci_regs.h b/include/linux/pci_regs.h
index c321316f1bc..064b1dc71c2 100644
--- a/include/linux/pci_regs.h
+++ b/include/linux/pci_regs.h
@@ -292,6 +292,12 @@
 #define PCI_MSI_DATA_64		12	/* 16 bits of data for 64-bit devices */
 #define PCI_MSI_MASK_BIT	16	/* Mask bits register */
 
+/* MSI-X registers (these are at offset PCI_MSI_FLAGS) */
+#define PCI_MSIX_FLAGS_QSIZE	0x7FF
+#define PCI_MSIX_FLAGS_ENABLE	(1 << 15)
+#define PCI_MSIX_FLAGS_BIRMASK	(7 << 0)
+#define PCI_MSIX_FLAGS_BITMASK	(1 << 0)
+
 /* CompactPCI Hotswap Register */
 
 #define PCI_CHSWP_CSR		2	/* Control and Status Register */